*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#080A0D;color:#C7CDD5;font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}button,input{font:inherit}a{color:#8ED8FF;text-underline-offset:4px}a:hover{color:#F5F7FA}button{cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #8ED8FF;outline-offset:3px;border-radius:3px}h1,h2,h3{color:#F5F7FA;line-height:1.38;margin:0 0 15px}h1{font-size:32px}h2{font-size:24px}h3{font-size:19px}p{margin:0 0 17px}ul,ol{padding-left:23px}li+li{margin-top:8px}.skip-link{position:fixed;top:-80px;left:12px;z-index:1002;background:#12161C;padding:8px 18px}.skip-link:focus{top:8px}.site-header{position:sticky;top:0;z-index:100;background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.header-inner{height:68px;max-width:1200px;margin:auto;padding:0 24px;display:flex;align-items:center;gap:24px;min-width:0}.brand{display:flex;align-items:center;gap:10px;color:#F5F7FA;text-decoration:none;min-width:0;flex-shrink:0}.brand .media-natural{padding:0;border:0;background:transparent;max-width:110px}.brand img{max-height:34px;max-width:110px}.brand .media-missing{display:none}.brand-fallback{font-size:18px;font-weight:800;white-space:nowrap}.desktop-nav{display:flex;align-items:center;justify-content:flex-end;gap:21px;flex:1;min-width:0;white-space:nowrap}.desktop-nav a{font-size:14px;text-decoration:none;color:#C7CDD5}.desktop-nav a[aria-current=page],.local-nav a[aria-current=page]{color:#8ED8FF;font-weight:700;text-decoration:underline}.desktop-nav a:hover{color:#8ED8FF}.entry-btn{border-radius:8px;background:#5C7CFA;color:#080A0D;font-size:14px;font-weight:700;white-space:nowrap;line-height:1;padding:13px 17px;text-decoration:none}.entry-btn:hover{background:#8ED8FF;color:#080A0D}.menu-trigger,.panel-close{border:1px solid rgba(255,255,255,.16);background:#12161C;border-radius:8px;padding:7px 12px;color:#F5F7FA;font-size:14px;white-space:nowrap}.mobile-trigger{display:none;min-height:44px}.desktop-panel{position:absolute;top:100%;left:0;width:100%;background:#12161C;border-bottom:1px solid rgba(255,255,255,.16);box-shadow:0 20px 38px #0009}.desktop-panel[hidden],.mobile-panel[hidden],.mobile-backdrop[hidden]{display:none!important}.panel-container{max-width:1200px;margin:auto;padding:19px 24px 24px}.panel-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.panel-heading strong{color:#F5F7FA}.panel-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.panel-groups section{min-width:0}.panel-groups h2,.mobile-panel h2{font-size:15px;margin:0 0 7px}.panel-groups a{font-size:14px;display:inline-block;margin:0 13px 4px 0;color:#C7CDD5;text-decoration:none}.mobile-panel,.mobile-backdrop{display:none}.page-container{max-width:1200px;margin:auto;padding:0 24px 64px}.all-topics-inline{display:inline-block;font-size:13px;margin:12px 0 24px;color:#8ED8FF}.breadcrumbs{padding-top:21px;display:flex;gap:10px;align-items:center;color:#9098A3;font-size:13px}.breadcrumbs a{color:#9098A3}.page-intro{padding:28px 0 15px;max-width:820px}.page-intro p{font-size:16px;color:#C7CDD5}.eyebrow,.kicker{display:block;color:#8ED8FF;font-size:13px;font-weight:700;letter-spacing:.055em;margin-bottom:12px}.local-nav{border-top:1px solid rgba(255,255,255,.09);border-bottom:1px solid rgba(255,255,255,.09);display:flex;gap:10px;flex-wrap:wrap;padding:11px 0}.local-nav a{color:#C7CDD5;font-size:13px;text-decoration:none;padding:5px 10px;background:#12161C;border-radius:6px}.article-body{max-width:820px}.article-section{margin:0 0 36px}.article-section h2{margin-bottom:15px}.article-body p,.article-body li{line-height:1.82}.article-body strong,.article-body b{color:#F5F7FA}.table-scroll{max-width:100%;overflow-x:auto;margin:18px 0 24px;border:1px solid rgba(255,255,255,.09);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:14px;min-width:560px}th,td{text-align:left;padding:12px 14px;border-bottom:1px solid rgba(255,255,255,.09);vertical-align:top}th{background:#171C23;color:#F5F7FA;font-weight:700}td{background:#0D1015}.step-list li{padding-left:6px;margin:12px 0}.reading-list{margin:14px 0}.media-natural{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-missing{min-height:100px;color:#9098A3;text-align:center;font-size:13px;border:1px dashed rgba(255,255,255,.16)}.media-missing span{padding:10px}.article-body .media-natural{margin:17px 0 21px}.home-masthead{padding:34px 0 20px}.home-masthead h1{max-width:900px;font-size:37px;margin:12px 0 20px}.home-masthead .lead{max-width:930px;color:#C7CDD5;font-size:17px}.reading-cues{display:flex;gap:13px;flex-wrap:wrap;margin-top:24px}.reading-cues span{border:1px solid rgba(255,255,255,.16);padding:5px 16px;border-radius:30px;font-size:13px;color:#F5F7FA}.home-poster .media-natural{min-height:110px}.home-poster .media-natural>img{max-height:250px}.home-section{margin:44px 0}.section-head{margin-bottom:20px;max-width:850px}.section-head p{color:#9098A3}.question-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.question-item{background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:11px;padding:23px;min-width:0}.question-item a,.feature-primary a,.feature-short a{font-size:14px}.feature-split{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:18px}.feature-primary{padding:26px;background:#12161C;border-radius:12px}.feature-short{display:grid;gap:13px}.feature-short article{border:1px solid rgba(255,255,255,.09);border-radius:10px;padding:14px 18px}.feature-short span{color:#8ED8FF;font-size:13px}.feature-short h3{font-size:18px;margin:4px 0}.image-triptych{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.image-triptych figure,.catalog-grid figure{margin:0;background:#12161C;border-radius:10px;padding:10px;min-width:0}.image-triptych figcaption,.catalog-grid figcaption{font-size:13px;color:#9098A3;padding:10px 5px;line-height:1.6}.section-links{margin-top:20px}.home-strip{background:#12161C;border-left:3px solid #5C7CFA;border-radius:8px;padding:24px;display:flex;gap:20px;align-items:center;justify-content:space-between}.home-strip>div:first-child{max-width:780px}.strip-links{display:grid;gap:12px;min-width:170px}.tri-path{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.tri-path p{background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:9px;padding:18px}.service-links{display:flex;flex-wrap:wrap;gap:12px}.service-links a{background:#171C23;border-radius:7px;padding:8px 16px}.scenario{border-left:2px solid #5C7CFA;padding:10px 0 10px 18px;margin:20px 0;background:linear-gradient(90deg,#12161C,transparent)}.scenario>span{color:#8ED8FF;font-size:13px}.side-note{padding:19px;background:#171C23;border-radius:10px;margin:20px 0}.timeline-step{display:flex;gap:18px;border-bottom:1px solid rgba(255,255,255,.09);padding:18px 0}.timeline-step>b{color:#8ED8FF;font-size:22px}.timeline-step h3{margin-bottom:6px}.path-stack article{border-bottom:1px solid rgba(255,255,255,.09);padding:12px 0}.process-line{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0}.process-line span{background:#171C23;border-radius:6px;padding:8px 14px;font-size:13px}.term-index{display:flex;gap:12px;flex-wrap:wrap;margin:5px 0 30px}.term-index a{border:1px solid rgba(255,255,255,.16);padding:6px 12px;border-radius:7px}.term-group{margin:0 0 30px;scroll-margin-top:95px}.term-entry{padding:16px;border-left:2px solid #5C7CFA;margin:12px 0;background:#0D1015}.term-entry p{margin-bottom:5px;font-size:15px}.observation-rows article,.bookmark-list article{display:grid;grid-template-columns:120px minmax(0,1fr);gap:20px;border-top:1px solid rgba(255,255,255,.09);padding:17px 0}.observation-rows article>b,.bookmark-list article>span{color:#8ED8FF}.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.catalog-id{font-weight:700;color:#8ED8FF;margin:2px 5px 9px}.gallery-study{margin:30px 0 45px;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.09)}.gallery-study .media-natural{--image-max-height:290px}.intent-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.intent-grid article{background:#12161C;padding:18px;border-radius:9px;min-width:0}.intent-grid article a{margin-right:12px;display:inline-block}.all-categories{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.all-categories section{background:#12161C;padding:18px;border-radius:9px}.all-categories ul{margin:0}.mechanism{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.mechanism>div{padding:17px;background:#12161C;border-radius:8px}.mechanism span{font-size:13px;color:#8ED8FF}.diagnostics article{border-left:3px solid #5C7CFA;padding:16px 20px;margin-bottom:18px;background:#12161C}.faq-list details{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:8px;margin:10px 0;padding:13px 17px}.faq-list summary{color:#F5F7FA;cursor:pointer;font-weight:700}.faq-list details p{margin:12px 0 0}.site-footer{background:#050608;border-top:1px solid rgba(255,255,255,.09)}.footer-inner{max-width:1200px;margin:auto;padding:34px 24px}.footer-brand a{font-size:20px;font-weight:800;color:#F5F7FA;text-decoration:none}.footer-brand span{display:block;color:#9098A3;font-size:12px}.footer-brand p{font-size:14px}.site-footer nav{display:flex;gap:16px;flex-wrap:wrap;margin:19px 0}.site-footer nav a{font-size:14px}.disclaimer{font-size:13px;color:#9098A3;max-width:900px}.back-to-top{position:fixed;bottom:24px;right:24px;width:42px;height:42px;background:#5C7CFA;border:0;border-radius:9px;color:#080A0D;font-weight:800;z-index:45}.back-to-top[hidden]{display:none}
@media(max-width:1040px){.desktop-nav{display:none}.mobile-trigger{display:inline-flex;align-items:center;justify-content:center;margin-left:auto}.header-inner{gap:14px}.brand{max-width:96px}.brand .media-natural{max-width:96px}.brand img{max-width:96px}.mobile-backdrop{display:block;position:fixed;inset:0;background:#000a;z-index:101}.mobile-panel{display:block;position:fixed;bottom:0;left:0;right:0;z-index:102;max-height:85vh;max-height:85dvh;overflow-y:auto;overscroll-behavior:contain;background:#12161C;border-radius:16px 16px 0 0;padding:18px 20px calc(18px + env(safe-area-inset-bottom));box-shadow:0 -10px 40px #0009}.mobile-panel-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.mobile-panel-head strong{color:#F5F7FA}.mobile-map-link{display:block;padding:13px;background:#171C23;border-radius:8px;margin-bottom:20px}.mobile-panel section{border-top:1px solid rgba(255,255,255,.09);padding:15px 0 8px}.mobile-panel ul{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;list-style:none;margin:0;padding:0}.mobile-panel li{margin:0}.mobile-panel li a{color:#C7CDD5;display:block;padding:8px 0;font-size:14px}.menu-open{overflow:hidden}}
@media(max-width:767px){body{font-size:15px}.header-inner{height:66px;padding:0 16px}.entry-btn{padding:12px 11px;font-size:13px}.page-container{padding:0 16px 46px}.home-masthead{padding:28px 0 13px}.home-masthead h1{font-size:28px}.home-masthead .lead{font-size:15px}.page-intro{padding:23px 0 12px}.page-intro h1{font-size:26px}.page-intro p{font-size:15px}.article-section h2,.home-section h2{font-size:21px}.article-section h3,.home-section h3{font-size:17px}.home-section{margin:30px 0}.question-grid,.feature-split,.image-triptych,.tri-path,.intent-grid,.all-categories,.mechanism{grid-template-columns:minmax(0,1fr)}.home-strip{display:block}.strip-links{display:flex;flex-wrap:wrap}.catalog-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:10px}.catalog-grid figure{padding:6px}.image-triptych .media-natural>img{max-height:210px}.home-poster .media-natural>img{max-height:170px}.article-body .media-natural>img{max-height:min(var(--image-max-height,280px),210px)}.observation-rows article,.bookmark-list article{grid-template-columns:58px minmax(0,1fr);gap:12px}.footer-inner{padding:28px 16px}.mobile-panel ul{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:359px){.brand-fallback{font-size:15px}.header-inner{gap:8px}.entry-btn{padding:11px 8px}.catalog-grid{grid-template-columns:1fr}.mobile-panel 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}}