:root{color-scheme:dark;--bg:#080A0D;--surface:#0D1015;--block:#12161C;--raised:#171C23;--hover:#1B2129;--text:#F5F7FA;--body:#C7CDD5;--muted:#9098A3;--blue:#5C7CFA;--bright:#6EA8FF;--line:rgba(255,255,255,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif}body.drawer-open{overflow:hidden}a{color:inherit;text-decoration:none}a:hover{color:var(--bright)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--bright);outline-offset:3px}img{display:block;max-width:100%;height:auto}button{font:inherit}.shell{width:min(100% - 48px,1200px);margin-inline:auto}.skip-link{position:absolute;top:-70px;left:10px;z-index:50;padding:8px 15px;background:var(--blue);color:#fff}.skip-link:focus{top:8px}.site-header{background:rgba(8,10,13,.96);border-bottom:1px solid var(--line);position:relative;z-index:11}.header-inner{height:76px;display:flex;align-items:center;gap:20px;min-width:0}.brand{display:flex;align-items:center;gap:10px;flex:0 1 224px;min-width:0}.brand-logo{height:36px;width:auto;max-width:130px;object-fit:contain}.brand-english{font-size:9px;line-height:1.3;letter-spacing:1.1px;color:var(--muted)}.desktop-navigation{display:flex;align-items:center;justify-content:center;gap:19px;white-space:nowrap;margin-left:auto}.desktop-navigation a{font-size:13px;padding:26px 0 24px;border-bottom:2px solid transparent}.desktop-navigation a.active{border-bottom-color:var(--bright);color:var(--bright)}.entry-link{background:var(--blue);color:#fff;border-radius:999px;padding:8px 19px;line-height:26px;font-size:13px;white-space:nowrap;margin-left:auto}.entry-link:hover{background:#7390FF;color:white}.menu-trigger{display:none}.quick-strip{background:#10141A;border-bottom:1px solid var(--line)}.quick-inner{min-height:44px}.desktop-quick{display:flex;align-items:center;gap:29px;min-height:44px}.quick-strip a{font-size:13px;color:#AFB8C5}.quick-strip a:hover{color:var(--bright)}.mobile-quick{display:none}.page-main{padding-top:28px;padding-bottom:66px;min-height:65vh}.breadcrumbs{display:flex;flex-wrap:wrap;gap:10px;color:var(--muted);font-size:13px;margin-bottom:30px}.breadcrumbs a{color:var(--bright)}.eyebrow{font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--bright);font-weight:700;margin:0 0 10px}.page-intro{max-width:850px;margin-bottom:38px}.page-intro h1,.hero h1{font-size:34px;line-height:1.36;color:var(--text);letter-spacing:-.6px;margin:0 0 18px}.page-intro .lead,.hero .lead{font-size:17px;line-height:1.85;color:#D5DBE3;max-width:800px}.section-head{display:flex;align-items:center;gap:16px;margin:0 0 23px}.section-head:before{content:'';height:23px;width:3px;background:var(--blue);border-radius:8px}.section-head h2{font-size:26px;line-height:1.4;color:var(--text);margin:0}.content-section{margin:0 0 45px}.content-section p,.article-copy p{margin:0 0 17px;max-width:820px}.content-section h3{font-size:19px;line-height:1.5;color:var(--text);margin:25px 0 12px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:48px;align-items:start}.reading-aside{position:sticky;top:18px;border:1px solid var(--line);background:var(--surface);border-radius:13px;padding:20px}.reading-aside h2{font-size:16px;color:var(--text);margin:0 0 12px}.reading-aside a{display:block;border-top:1px solid var(--line);padding:10px 0;font-size:13px}.editorial-note{padding:20px 24px;background:var(--block);border-left:2px solid var(--blue);margin:24px 0 38px;font-size:15px}.editorial-note p{margin:0}.related-links{border-top:1px solid var(--line);padding:26px 0;margin-top:36px}.related-links strong{display:block;color:var(--text);font-size:18px;margin-bottom:14px}.related-links div{display:flex;gap:12px;flex-wrap:wrap}.related-links a{border:1px solid var(--line);background:var(--surface);padding:7px 14px;border-radius:8px;font-size:14px}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.topic-tile{display:block;border:1px solid var(--line);background:var(--block);border-radius:13px;padding:23px;min-width:0}.topic-tile:hover{background:var(--hover)}.tile-label{font-size:12px;color:var(--bright)}.topic-tile h3{margin:5px 0 10px;color:var(--text);font-size:20px}.topic-tile p{margin:0;color:var(--body);font-size:14px}.tile-arrow{display:inline-block;color:var(--bright);font-size:13px;margin-top:15px}.hero{display:grid;grid-template-columns:minmax(0,52fr) minmax(0,48fr);align-items:center;gap:28px;padding:16px 0 30px;border-bottom:1px solid var(--line);margin-bottom:50px}.hero h1{font-size:41px}.hero p{margin-bottom:24px}.hero-links{display:flex;gap:22px;font-weight:600;font-size:14px;color:var(--bright)}.visual-figure{margin:0;min-width:0;max-width:100%;background:var(--surface);border:1px solid var(--line);border-radius:13px;padding:13px}.visual-figure img{object-fit:contain;object-position:center;display:block;width:100%;height:auto;max-height:245px}.visual-figure figcaption{font-size:12px;color:var(--muted);padding:10px 3px 0;line-height:1.65}.visual-figure.hero-image img{max-height:245px}.visual-figure.device-image{max-width:270px}.visual-figure.device-image img{max-height:340px}.visual-figure.small-image img{max-height:175px}.image-placeholder{background:radial-gradient(circle at 70% 35%,#1A273F,#101721 44%,#0D1015);border:1px solid var(--line);border-radius:10px;min-height:135px;display:flex;align-items:center;justify-content:center;color:#7385A5;font-size:12px;letter-spacing:3px}.hero-image .image-placeholder{height:245px}.device-image .image-placeholder{height:300px}.media-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.media-grid .visual-figure img{max-height:180px}.media-grid .visual-figure figcaption{min-height:62px}.art-wall{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.art-wall .visual-figure img{max-height:250px}.art-wall .visual-figure:first-child{grid-column:span 2}.split-section{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:center;margin:42px 0}.split-section>*{min-width:0}.split-section h2{font-size:26px;line-height:1.4;color:var(--text);margin:0 0 16px}.split-section p{margin-top:0}.numbered-index{counter-reset:item;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}.index-item{background:var(--bg);padding:20px;min-width:0}.index-item:before{counter-increment:item;content:counter(item,decimal-leading-zero);color:var(--bright);font-size:12px;display:block}.index-item h3{color:var(--text);margin:6px 0;font-size:18px}.index-item p{font-size:14px;margin:0}.knowledge-table{width:100%;border-collapse:collapse;margin:22px 0 30px;font-size:14px}.knowledge-table th,.knowledge-table td{text-align:left;border-bottom:1px solid var(--line);padding:15px 12px;vertical-align:top}.knowledge-table th{color:var(--text);background:var(--block)}.faq-list details{border-bottom:1px solid var(--line);padding:18px 4px}.faq-list summary{cursor:pointer;color:var(--text);font-weight:600}.faq-list p{max-width:850px;margin:13px 0 0}.site-footer{background:#050608;border-top:1px solid var(--line);padding:42px 0 20px}.footer-grid{display:grid;grid-template-columns:1.25fr 1.2fr 1fr;gap:48px}.footer-logo{height:33px;width:auto;object-fit:contain;max-width:150px}.footer-brand p{font-size:13px;max-width:300px;margin-top:16px;color:var(--muted)}.site-footer h2{color:var(--text);font-size:15px;margin:0 0 14px}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}.footer-links a{font-size:13px;color:var(--muted)}.footer-bottom{display:flex;gap:25px;justify-content:space-between;border-top:1px solid var(--line);padding-top:19px;margin-top:38px;color:var(--muted);font-size:12px}.back-to-top{position:fixed;right:22px;bottom:22px;width:42px;height:42px;background:var(--blue);border:0;color:#fff;border-radius:50%;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s}.back-to-top.visible{opacity:1;pointer-events:auto}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.69);z-index:19;visibility:hidden;pointer-events:none}.drawer-overlay.is-open{visibility:visible;pointer-events:auto}.site-drawer{position:fixed;left:0;top:0;bottom:0;z-index:20;overflow-y:auto;background:var(--surface);width:min(86vw,390px);padding:20px 24px;transform:translateX(-101%);transition:transform .25s,visibility .25s;visibility:hidden;pointer-events:none}.site-drawer.is-open{transform:none;visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:20px}.drawer-logo{height:32px;width:auto;max-width:140px;object-fit:contain}.drawer-close{background:transparent;color:white;border:1px solid var(--line);width:36px;height:36px;border-radius:50%;font-size:22px;cursor:pointer}.drawer-group{padding:15px 0;border-bottom:1px solid var(--line)}.drawer-group h2{font-size:12px;color:var(--bright);letter-spacing:1px;margin:0 0 9px}.drawer-group a{display:block;font-size:14px;padding:5px 0}.home-section{margin-bottom:56px}.home-section>p{max-width:830px}.compact-entries{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.compact-entries article{border-top:1px solid var(--line);padding-top:15px}.compact-entries h3{color:var(--text);margin:0 0 12px}.info-strip{background:var(--block);border:1px solid var(--line);padding:23px;border-radius:12px;font-size:14px}.page-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.page-index a{border-bottom:1px solid var(--line);padding:14px 3px}.page-index strong{display:block;color:var(--text)}.page-index span{display:block;color:var(--muted);font-size:13px}.ordered-steps{list-style:none;counter-reset:steps;padding:0}.ordered-steps li{counter-increment:steps;border-bottom:1px solid var(--line);padding:20px 0 20px 60px;position:relative}.ordered-steps li:before{content:counter(steps,decimal-leading-zero);position:absolute;left:5px;top:22px;font-weight:bold;color:var(--bright)}@media(max-width:1100px){.desktop-navigation{gap:12px}.desktop-navigation a{font-size:12px}.brand-english{display:none}.brand{flex-basis:130px}}@media(max-width:979px){.shell{width:min(100% - 40px,1200px)}.site-header .header-inner{position:relative;height:64px;justify-content:space-between}.desktop-navigation{display:none}.menu-trigger{display:flex;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;background:transparent;padding:9px;flex-shrink:0;cursor:pointer}.menu-trigger span{background:var(--body);width:20px;height:2px}.brand{position:absolute;left:50%;transform:translateX(-50%);width:auto;max-width:132px;justify-content:center}.brand-logo{height:28px;max-width:130px}.entry-link{margin-left:auto;padding:6px 12px;font-size:12px;line-height:26px}.desktop-quick{display:none}.mobile-quick{display:flex;gap:26px;min-height:44px;align-items:center;overflow-x:auto;white-space:nowrap;scrollbar-width:none}.mobile-quick::-webkit-scrollbar{display:none}.article-layout{grid-template-columns:minmax(0,1fr) 210px;gap:25px}.footer-grid{gap:22px}}@media(max-width:767px){.shell{width:calc(100% - 32px)}.page-main{padding-top:20px}.hero{grid-template-columns:1fr;gap:16px}.hero .hero-image{grid-row:1}.hero h1{font-size:30px}.page-intro h1{font-size:26px}.page-intro .lead,.hero .lead{font-size:15px}.hero-image .image-placeholder{height:165px}.visual-figure.hero-image img{max-height:200px}.section-head h2,.split-section h2{font-size:22px}.content-section{margin-bottom:32px}.home-section{margin-bottom:36px}.feature-grid,.compact-entries,.split-section,.article-layout{grid-template-columns:1fr}.reading-aside{position:static}.media-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.media-grid .visual-figure img{max-height:155px}.art-wall{grid-template-columns:repeat(2,minmax(0,1fr))}.art-wall .visual-figure:first-child{grid-column:span 2}.visual-figure img{max-height:185px}.visual-figure.device-image{max-width:220px}.visual-figure.device-image img{max-height:340px}.numbered-index{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-brand{grid-column:span 2}.footer-bottom{flex-direction:column;gap:7px}.page-index{grid-template-columns:1fr}body{font-size:15px}}@media(max-width:374px){.brand{max-width:112px}.brand-logo{max-width:105px}.entry-link{font-size:11px;padding:6px 10px}.media-grid,.art-wall{grid-template-columns:1fr}.art-wall .visual-figure:first-child{grid-column:auto}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
