*{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}a{color:#8ED8FF;text-decoration:none}a:hover{color:#fff}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #8ED8FF;outline-offset:4px}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center center}h1,h2,h3{color:#F5F7FA;line-height:1.4;margin:0 0 17px}h1{font-size:clamp(27px,3.1vw,42px);letter-spacing:-.03em}h2{font-size:clamp(21px,2.15vw,27px)}h3{font-size:19px}p{margin:0 0 17px}ul,ol{padding-left:1.5em}.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.skip{position:absolute;left:-9999px;top:8px;z-index:9999;background:#fff;color:#111;padding:8px}.skip:focus{left:8px}.site-header{position:relative;z-index:12;background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.head-inner{height:76px;display:flex;align-items:center;gap:20px;min-width:0}.brand{display:flex;align-items:center;gap:7px;flex:0 0 auto;min-width:0;color:white}.brand img{max-height:36px;width:auto;max-width:175px}.brand strong{font-size:24px}.brand small{font-size:9px;letter-spacing:.12em;color:#9098A3;max-width:76px;line-height:1.45}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:clamp(12px,1.55vw,24px);margin-left:auto;white-space:nowrap;min-width:0}.desktop-nav a{color:#C7CDD5;font-size:14px;padding:25px 0 21px;border-bottom:2px solid transparent}.desktop-nav a[aria-current=page]{color:#6EA8FF;border-color:#6EA8FF}.enter{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;background:#5C7CFA;color:white;padding:0 21px;height:42px;border-radius:999px;white-space:nowrap;font-size:14px}.enter:hover{background:#7390FF;color:white}.menu-toggle{display:none;border:0;background:none;width:40px;height:40px;padding:10px;flex:0 0 40px}.menu-toggle span{display:block;height:2px;background:#F5F7FA;margin:5px 0}.quick-nav{background:#10141A;border-bottom:1px solid rgba(255,255,255,.09)}.quick-inner{min-width:0}.quick-desktop{min-height:45px;display:flex;align-items:center;gap:25px;min-width:0;white-space:nowrap}.quick-nav a{color:#AAB4C3;font-size:13px}.quick-nav a:hover{color:#6EA8FF}.quick-mobile{display:none}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.66);z-index:20;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer{position:fixed;top:0;bottom:0;left:0;width:min(86vw,390px);overflow-y:auto;background:#0D1015;border-right:1px solid #292f3b;z-index:21;transform:translateX(-101%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s;padding:20px 22px}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #2a2e36;padding-bottom:16px}.drawer-brand{font-size:21px;font-weight:bold;color:white}.drawer-brand small{display:block;color:#9098A3;font-size:11px;font-weight:normal}.drawer-close{border:1px solid #434a55;background:#171C23;color:white;width:38px;height:38px;border-radius:8px}.drawer-section{margin-top:21px}.drawer-section h2{font-size:15px;color:#8ED8FF;margin-bottom:8px}.drawer-linklist{display:grid;grid-template-columns:1fr 1fr;gap:4px 12px}.drawer-linklist a{color:#C7CDD5;font-size:14px;padding:6px 0}.main-content{padding-top:30px;padding-bottom:70px;min-height:60vh}.breadcrumbs{font-size:13px;color:#9098A3;margin:1px 0 32px;display:flex;gap:12px;flex-wrap:wrap}.breadcrumbs a{color:#9098A3}.eyebrow{color:#8ED8FF;text-transform:uppercase;letter-spacing:.16em;font-size:12px;font-weight:bold;margin:0 0 13px}.page-intro{max-width:810px;margin-bottom:42px}.page-intro p{font-size:17px;color:#AAB4C3}.rule{border:0;border-top:1px solid rgba(255,255,255,.12);margin:30px 0}.hero{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);align-items:center;gap:38px;padding:28px 0 52px}.hero p{max-width:600px}.hero h1{margin-bottom:23px}.hero .image-shell{height:290px}.text-links{display:flex;gap:22px;flex-wrap:wrap;margin-top:21px}.text-links a{border-bottom:1px solid #5C7CFA;padding-bottom:3px}.section{margin:48px 0 58px}.section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:18px;margin-bottom:20px;border-bottom:1px solid #292e37;padding-bottom:13px}.section-heading small{color:#9098A3}.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.panel{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:22px;min-width:0}.panel h3{margin:0 0 10px}.panel p:last-child{margin-bottom:0}.split{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);gap:38px}.split.equal{grid-template-columns:repeat(2,minmax(0,1fr))}.split.reverse{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}.story{max-width:820px}.story h2{margin-top:36px}.story h3{margin-top:24px}.story p{line-height:1.85}.story ul{margin-bottom:25px}.related{border-left:2px solid #5C7CFA;padding:0 0 0 22px;align-self:start}.related h2{font-size:20px}.related ul{list-style:none;padding:0}.related li{border-top:1px solid #2d333d;padding:9px 0}.article-layout{display:grid;grid-template-columns:minmax(0,820px) minmax(0,250px);gap:55px;align-items:start}.figure{margin:0;min-width:0;max-width:100%}.image-shell{display:flex;align-items:center;justify-content:center;min-width:0;max-width:100%;background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:13px;overflow:hidden;padding:9px;min-height:110px}.image-shell img{max-width:100%;max-height:100%;width:auto;height:auto}.figure figcaption{color:#9098A3;font-size:13px;line-height:1.6;margin-top:9px}.missing-image{display:grid;place-items:center;min-height:120px;width:100%;color:#6d7888;font-size:12px}.hero .missing-image{height:265px}.thumb .image-shell{height:170px}.feature .image-shell{height:220px}.banner .image-shell{height:210px}.device .image-shell{height:340px;max-width:270px;margin:auto}.gif .image-shell{height:150px}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.gallery-grid .image-shell{height:230px}.gallery-grid .panel{padding:14px}.gallery-grid h3{font-size:17px;margin-top:12px}.number-list{counter-reset:topic;list-style:none;padding:0;margin:0}.number-list li{counter-increment:topic;border-top:1px solid #303743;padding:19px 0 19px 44px;position:relative}.number-list li:before{content:counter(topic,decimal-leading-zero);position:absolute;left:0;color:#6EA8FF;font-size:13px;font-weight:bold}.callout{border-left:3px solid #7775FF;background:#12161C;padding:20px 24px;margin:26px 0;border-radius:0 12px 12px 0}.data-table{width:100%;border-collapse:collapse;font-size:14px;margin:20px 0 28px}.data-table th,.data-table td{border-bottom:1px solid #343b46;padding:15px;text-align:left;vertical-align:top}.data-table th{color:#8ED8FF;background:#12161C}.faq-item{border-bottom:1px solid #303743;padding:13px 0}.faq-item summary{cursor:pointer;font-weight:bold;color:#F5F7FA}.faq-item p{padding:10px 0 0}.site-footer{background:#050608;border-top:1px solid rgba(255,255,255,.09);padding:48px 0 22px}.footer-grid{display:grid;grid-template-columns:1fr 1.4fr .65fr;gap:45px}.footer-grid h2{font-size:16px}.footer-grid p{color:#9098A3;font-size:14px}.footer-brand{font-size:24px;color:white;font-weight:bold;margin-bottom:16px}.footer-brand img{max-height:36px;width:auto}.footer-links{display:flex;flex-wrap:wrap;gap:8px 17px}.footer-links a{font-size:13px;color:#AAB4C3}.footer-bottom{border-top:1px solid #22262c;margin-top:33px;padding-top:22px;font-size:12px;color:#9098A3;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}#back-top{position:fixed;right:20px;bottom:24px;width:42px;height:42px;border-radius:50%;border:1px solid #444d5c;background:#171C23;color:#fff;opacity:0;pointer-events:none;transition:opacity .2s}#back-top.is-visible{opacity:1;pointer-events:auto}@media(max-width:1100px){.desktop-nav{gap:12px}.desktop-nav a{font-size:13px}.brand small{display:none}}@media(max-width:979px){.container{width:calc(100% - 40px)}.head-inner{height:64px;justify-content:space-between;position:relative}.menu-toggle{display:block}.desktop-nav{display:none}.brand{position:absolute;left:50%;transform:translateX(-50%)}.brand img{max-height:28px;max-width:135px}.brand strong{font-size:20px}.enter{height:40px;padding:0 14px;font-size:13px;margin-left:auto}.quick-desktop{display:none}.quick-mobile{display:flex;gap:27px;overflow-x:auto;white-space:nowrap;scrollbar-width:none;padding:11px 0}.quick-mobile::-webkit-scrollbar{display:none}.quick-mobile a{flex:0 0 auto}.article-layout{grid-template-columns:minmax(0,1fr) 200px;gap:28px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>nav:last-child{grid-column:span 2}}@media(max-width:767px){.main-content{padding-top:24px}.hero,.split,.split.equal,.split.reverse,.article-layout,.grid-two{grid-template-columns:minmax(0,1fr)}.hero{gap:24px;padding:0 0 26px}.hero .figure{grid-row:1}.hero .image-shell{height:215px}.section{margin:34px 0}.grid-three{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout .related{margin-top:20px}.footer-grid{gap:24px}.page-intro{margin-bottom:25px}.page-intro p{font-size:16px}.feature .image-shell{height:180px}.banner .image-shell{height:150px}.thumb .image-shell{height:150px}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid .image-shell{height:160px}.data-table{display:block;overflow-x:auto}.section-heading{align-items:flex-start}}@media(max-width:480px){.container{width:calc(100% - 32px)}h1{font-size:29px}body{font-size:15px}.brand img{max-width:112px;max-height:28px}.enter{font-size:12px;padding:0 10px;height:38px}.menu-toggle{width:40px}.grid-three,.gallery-grid{grid-template-columns:1fr}.panel{padding:17px}.hero .image-shell{height:185px}.thumb .image-shell{height:142px}.feature .image-shell{height:165px}.device .image-shell{max-width:220px;height:320px}.gif .image-shell{height:120px}.footer-grid{grid-template-columns:1fr}.footer-grid>nav:last-child{grid-column:auto}.footer-links{gap:5px 14px}.section-heading small{display:none}}@media(max-width:340px){.brand img{max-width:95px}.enter{padding:0 8px}.head-inner{gap:3px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important}}