:root{color-scheme:dark;--bg:#080A0D;--panel:#0D1015;--card:#12161C;--sub:#171C23;--hover:#1B2129;--text:#F5F7FA;--body:#C7CDD5;--muted:#9098A3;--blue:#5C7CFA;--bright:#6EA8FF;--ice:#8ED8FF;--edge:rgba(255,255,255,.09);--edge-hi:rgba(255,255,255,.16)}
*{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}img{display:block;width:100%;height:auto;max-width:100%;object-fit:contain;object-position:center}figure{margin:0}a{color:var(--bright);text-decoration:none}a:hover{color:var(--ice)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ice);outline-offset:4px}button{font:inherit;cursor:pointer}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--text);line-height:1.35}h1{font-size:34px}h2{font-size:26px}h3{font-size:19px}p{margin-bottom:16px}.wrap{width:min(100% - 48px,1200px);margin-inline:auto}.skip-link{position:absolute;left:-999px;top:0;z-index:1000;background:#fff;color:#000;padding:8px}.skip-link:focus{left:10px}.site-header{background:rgba(8,10,13,.96);border-bottom:1px solid var(--edge);position:relative;z-index:30}.header-inner{height:76px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:12px;flex:0 0 220px;min-width:0}.brand-logo{display:block;max-width:126px;max-height:36px}.brand-english{font-size:9px;line-height:1.4;letter-spacing:1px;max-width:94px;color:var(--muted)}.image-logo{display:block;background:transparent;border:0;border-radius:0}.image-logo img{max-height:36px;width:auto}.image-logo.missing .image-placeholder{width:90px;height:34px;background:linear-gradient(90deg,#283248,#121722);border-radius:4px}.main-nav{display:flex;align-items:center;gap:19px;flex:1;justify-content:center;min-width:0;white-space:nowrap}.main-nav a{position:relative;color:var(--body);font-size:14px}.main-nav a:hover,.main-nav a.active{color:var(--bright)}.main-nav a.active:after{position:absolute;content:"";height:2px;bottom:-9px;left:0;right:0;background:var(--bright)}.enter-btn{display:inline-flex;align-items:center;justify-content:center;white-space:nowrap;height:42px;padding:0 21px;border-radius:999px;background:var(--blue);color:#fff;font-size:14px;font-weight:700}.enter-btn:hover{background:#7390FF;color:white}.quick-nav{background:#10141A;border-bottom:1px solid var(--edge)}.quick-desktop{height:44px;display:flex;align-items:center;gap:30px}.quick-desktop a{color:var(--muted);font-size:13px;white-space:nowrap}.quick-desktop a:hover,.quick-desktop a.active{color:var(--ice)}.quick-mobile{display:none}.menu-toggle{display:none;width:40px;height:40px;flex:0 0 40px;border:1px solid var(--edge);background:var(--panel);border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px}.menu-toggle span{height:2px;width:18px;background:#fff;border-radius:2px}.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.67);visibility:hidden;pointer-events:none;opacity:0;transition:opacity .18s;z-index:60}.site-drawer{position:fixed;inset:0 auto 0 0;width:min(390px,86vw);overflow-y:auto;background:#0D1015;box-shadow:8px 0 50px #0006;padding:23px;z-index:70;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s}.drawer-open{overflow:hidden}.drawer-open .drawer-mask{visibility:visible;pointer-events:auto;opacity:1}.drawer-open .site-drawer{visibility:visible;pointer-events:auto;transform:translateX(0)}.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--edge)}.drawer-brand{max-width:140px}.drawer-close{width:40px;height:40px;border:1px solid var(--edge);color:white;background:var(--card);border-radius:10px;font-size:28px;line-height:1}.drawer-group{padding:15px 0;border-bottom:1px solid var(--edge)}.drawer-group h2{font-size:13px;letter-spacing:2px;color:var(--muted);margin-bottom:9px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 9px}.drawer-links a{display:block;padding:7px 0;color:var(--body);font-size:14px}.drawer-links a:hover{color:var(--ice)}.site-main{padding-top:34px;padding-bottom:85px;min-height:65vh}.breadcrumbs{font-size:13px;color:var(--muted);display:flex;gap:12px;align-items:center;margin-bottom:34px;flex-wrap:wrap}.breadcrumbs strong{color:var(--body);font-weight:400}.breadcrumbs a{color:var(--muted)}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:2px;color:var(--ice);display:block;margin-bottom:15px}.page-opening{max-width:890px;margin-bottom:42px;padding-bottom:24px;border-bottom:1px solid var(--edge)}.page-opening h1{max-width:900px;line-height:1.35}.lead{font-size:18px;line-height:1.85;color:var(--body);max-width:800px}.longread{max-width:820px}.prose-section{margin:0 0 46px}.prose-section h2{border-top:1px solid var(--edge);padding-top:22px;margin-bottom:22px}.prose-section p,.longread p{line-height:1.85}.prose-section p:first-of-type{font-size:17px;color:#D8DFE8}.article-layout{display:grid;grid-template-columns:minmax(0,820px) minmax(0,250px);gap:42px;align-items:start}.side-index{border-left:1px solid var(--edge);padding-left:24px;position:sticky;top:24px}.side-index h2{font-size:16px}.side-index a{display:block;padding:7px 0;font-size:14px}.related-reading{border-top:1px solid var(--edge);padding-top:28px;margin-top:48px}.related-reading h2{font-size:21px}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.related-item{background:var(--card);border:1px solid var(--edge);padding:18px;border-radius:12px;min-width:0}.related-item a{font-size:17px;display:block;color:var(--text)}.related-item span{font-size:13px;line-height:1.6;color:var(--muted);display:block;margin-top:7px}.image-frame{min-width:0;max-width:100%;background:var(--panel);border:1px solid var(--edge);border-radius:13px;overflow:hidden;padding:14px}.image-frame img{width:100%;max-height:245px;height:auto;object-fit:contain}.image-frame figcaption{font-size:13px;color:var(--muted);line-height:1.6;padding-top:10px}.image-placeholder{height:170px;min-height:100px;background:linear-gradient(145deg,#151C29,#0D1015 68%);border:1px dashed #394457;border-radius:8px}.image-hero img{max-height:310px}.image-hero .image-placeholder{height:290px}.image-thumb img{max-height:175px}.image-thumb .image-placeholder{height:150px}.image-device{max-width:270px;margin-inline:auto}.image-device img{max-height:340px}.image-device .image-placeholder{height:320px}.image-gif img{max-height:175px}.image-gif .image-placeholder{height:140px}.image-banner img{max-height:245px}.image-banner .image-placeholder{height:220px}.image-logo{padding:0}.image-logo .image-placeholder{height:34px;min-height:34px}.picture-text{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:36px;align-items:center;margin:35px 0 54px}.picture-text>*,.split>*,.editorial-grid>*{min-width:0}.picture-text.reverse{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr)}.split{display:grid;grid-template-columns:1.15fr .85fr;gap:45px;margin:44px 0}.section-label{color:var(--ice);font-size:13px;letter-spacing:1.5px}.feature-box{background:var(--card);border:1px solid var(--edge);border-radius:14px;padding:24px}.feature-box h2{font-size:21px}.feature-box p:last-child{margin-bottom:0}.numbered{counter-reset:item;list-style:none;padding:0}.numbered li{counter-increment:item;padding:18px 0 18px 52px;position:relative;border-bottom:1px solid var(--edge)}.numbered li:before{content:counter(item,decimal-leading-zero);position:absolute;top:19px;left:0;color:var(--ice);font-weight:700;font-size:14px}.numbered a{font-weight:700}.editorial-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.editorial-card{border-top:1px solid var(--edge-hi);padding:20px 0}.editorial-card h3{font-size:21px}.visual-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin:24px 0 40px}.visual-grid .image-frame img{max-height:165px}.visual-grid .image-placeholder{height:145px}.visual-grid h3{font-size:17px;margin:13px 0 8px}.visual-grid p{font-size:14px;line-height:1.75}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.gallery-grid>.gallery-card:first-child{grid-column:span 2}.gallery-card{border:1px solid var(--edge);background:var(--card);border-radius:12px;padding:14px;min-width:0}.gallery-card h3{font-size:18px;margin:12px 0}.gallery-card p{font-size:14px}.data-table{width:100%;border-collapse:collapse;margin:20px 0 30px;font-size:15px}.data-table th,.data-table td{padding:12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--edge)}.data-table th{color:var(--text);background:var(--sub)}.faq details{background:var(--card);border:1px solid var(--edge);padding:13px 18px;margin-bottom:10px;border-radius:10px}.faq summary{cursor:pointer;color:var(--text);font-weight:700}.faq details p{margin:12px 0 0;font-size:15px}.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:35px;align-items:center;margin-bottom:52px}.hero h1{font-size:41px}.hero p{font-size:17px}.hero-links{display:flex;gap:24px;flex-wrap:wrap;margin-top:22px}.hero-links a{border-bottom:1px solid var(--bright)}.home-section{margin-bottom:60px}.home-section>h2{padding-top:20px;border-top:1px solid var(--edge)}.home-section>p{max-width:850px}.home-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.home-index article{padding:24px;background:var(--card);border:1px solid var(--edge);border-radius:12px}.home-index h3 a{color:var(--text)}.mini-list a{display:block;padding:12px 0;border-bottom:1px solid var(--edge)}.site-footer{background:#050608;border-top:1px solid var(--edge);padding-top:48px}.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:50px}.footer-intro{max-width:330px}.footer-intro>.image-logo{max-width:115px}.footer-intro p{font-size:13px;color:var(--muted)}.footer-links h2{font-size:16px}.footer-links>div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 12px}.footer-links a{font-size:13px;color:var(--muted)}.footer-bottom{display:flex;gap:20px;justify-content:space-between;border-top:1px solid var(--edge);margin-top:38px;padding:20px 0;color:var(--muted);font-size:12px}.back-top{position:fixed;right:24px;bottom:24px;width:42px;height:42px;border-radius:50%;border:1px solid var(--edge-hi);background:var(--sub);color:white;visibility:hidden;opacity:0;pointer-events:none;transition:opacity .2s}.back-top.shown{visibility:visible;opacity:1;pointer-events:auto}
@media(max-width:1100px){.main-nav{gap:12px}.brand{flex-basis:190px}.brand-english{display:none}}
@media(max-width:979px){.wrap{width:min(100% - 40px,1200px)}.header-inner{height:64px;position:relative;justify-content:space-between}.menu-toggle{display:flex}.brand{flex:none;position:absolute;left:50%;transform:translateX(-50%);justify-content:center;width:130px;max-width:130px}.brand-logo{max-width:130px}.brand-logo img{max-height:28px}.main-nav,.quick-desktop{display:none}.quick-mobile{display:flex;width:100%;overflow-x:auto;scrollbar-width:none;gap:27px;padding:0 20px;height:44px;align-items:center;white-space:nowrap}.quick-mobile::-webkit-scrollbar{display:none}.quick-mobile a{font-size:14px;flex-shrink:0;color:var(--body)}.enter-btn{height:39px;padding:0 15px;font-size:13px}.article-layout{grid-template-columns:minmax(0,1fr)}.side-index{position:static;display:none}.footer-grid{gap:25px}}
@media(max-width:767px){.site-main{padding-top:22px;padding-bottom:55px}.breadcrumbs{margin-bottom:22px}.page-opening{margin-bottom:30px}.page-opening h1{font-size:26px}.lead{font-size:16px}.split,.picture-text,.picture-text.reverse,.hero{grid-template-columns:minmax(0,1fr);gap:20px}.hero{display:flex;flex-direction:column-reverse;align-items:stretch}.hero h1{font-size:30px}.home-index,.editorial-grid{grid-template-columns:1fr}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid>.gallery-card:first-child{grid-column:auto}.related-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-intro{grid-column:span 2}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:8px}h2{font-size:22px}.image-hero img{max-height:205px}.image-hero .image-placeholder{height:190px}.image-thumb img{max-height:155px}.image-banner img{max-height:145px}.image-device{max-width:220px}.image-device img{max-height:340px}.image-gif img{max-height:145px}.image-frame{padding:9px}.home-section{margin-bottom:35px}.prose-section{margin-bottom:35px}}
@media(max-width:480px){.wrap{width:calc(100% - 32px)}.brand{max-width:105px}.brand-logo{max-width:105px}.enter-btn{padding:0 11px}.visual-grid,.gallery-grid,.related-grid{grid-template-columns:1fr}.gallery-card{padding:12px}.footer-grid{grid-template-columns:1fr}.footer-intro{grid-column:auto}.footer-links>div{grid-template-columns:1fr 1fr}.data-table{font-size:13px}.data-table th,.data-table td{padding:8px}.page-opening h1{font-size:25px}body{font-size:15px}.prose-section p:first-of-type{font-size:16px}}
@media(max-width:350px){.brand{max-width:85px}.enter-btn{font-size:12px;padding:0 9px}.header-inner{gap:5px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
