*{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}body.drawer-open{overflow:hidden}a{color:#8ED8FF;text-decoration:none}a:hover{text-decoration:underline}button{font:inherit;cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3{line-height:1.35;color:#F5F7FA;margin:0 0 17px}h1{font-size:34px;letter-spacing:-.025em}h2{font-size:26px}h3{font-size:20px}p{margin:0 0 16px} .wrap{width:min(1200px,calc(100% - 48px));margin-inline:auto;min-width:0}.narrow{max-width:820px}.eyebrow{color:#6EA8FF;text-transform:uppercase;font-size:12px;font-weight:700;letter-spacing:.16em;margin-bottom:15px}.muted{color:#9098A3}.site-header{height:74px;background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09);position:relative;z-index:20}.header-inner{max-width:1200px;margin:auto;height:100%;position:relative;display:flex;align-items:center;justify-content:space-between;padding:0 24px}.menu-toggle{height:44px;width:44px;border:1px solid #303740;border-radius:9px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;background:#12161C;color:#F5F7FA}.menu-toggle span{display:block;width:20px;height:2px;background:currentColor}.header-logo{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);height:36px;width:min(210px,35vw);display:flex;align-items:center;justify-content:center}.header-logo .media,.drawer-logo .media,.footer-logo .media{background:transparent;border:0;border-radius:0;height:100%;max-height:none;min-height:0}.header-logo img,.drawer-logo img,.footer-logo img{width:100%;height:100%;object-fit:contain}.header-logo .media-placeholder,.drawer-logo .media-placeholder,.footer-logo .media-placeholder{background:transparent;border:1px solid rgba(255,255,255,.08)}.entry-link{height:42px;padding:0 21px;display:inline-flex;align-items:center;justify-content:center;background:#5C7CFA;border-radius:999px;color:#fff;font-size:14px;font-weight:700;white-space:nowrap}.entry-link:hover{text-decoration:none;background:#6EA8FF;color:#080A0D}.channel-bar{height:48px;background:#0D1015;border-bottom:1px solid rgba(255,255,255,.09);overflow-x:auto;overflow-y:hidden;scrollbar-width:thin}.channel-inner{display:flex;justify-content:space-between;align-items:stretch;gap:10px;max-width:1200px;min-width:max-content;margin:auto;padding:0 24px;height:100%}.channel-item{color:#C7CDD5;font-size:14px;white-space:nowrap;padding:10px 10px 8px;border-bottom:2px solid transparent}.channel-item.is-active{color:#6EA8FF;border-bottom-color:#6EA8FF}.drawer-shade{position:fixed;inset:0;background:rgba(0,0,0,.67);z-index:90;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.site-drawer{position:fixed;left:0;top:0;bottom:0;width:min(420px,86vw);background:#0D1015;border-right:1px solid #2e3540;z-index:100;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s;display:flex;flex-direction:column;box-shadow:14px 0 50px #0008}.drawer-shade.open{opacity:1;visibility:visible;pointer-events:auto}.site-drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:22px 24px 10px}.drawer-logo{width:160px;height:34px}.drawer-close{border:1px solid #2d3640;border-radius:10px;background:#171C23;color:#fff;width:40px;height:40px;font-size:28px;line-height:1}.drawer-intro{font-size:13px;color:#9098A3;padding:0 24px 12px}.drawer-scroll{overflow-y:auto;padding:0 24px 28px;flex:1}.drawer-group{padding:17px 0;border-top:1px solid rgba(255,255,255,.09)}.drawer-group h2{font-size:13px;color:#9098A3;letter-spacing:.07em;margin:0 0 9px}.drawer-links{display:grid;grid-template-columns:1fr 1fr;gap:3px 12px}.drawer-links a{font-size:14px;color:#C7CDD5;padding:6px 10px;border-left:2px solid transparent}.drawer-links a.is-active{border-left-color:#6EA8FF;color:#6EA8FF;background:#171C23}.skip-link{position:absolute;left:-9999px;top:0}.skip-link:focus{position:fixed;left:10px;top:10px;background:#fff;color:#000;padding:9px;z-index:200}main{min-height:60vh}.section{margin:0 auto;padding:52px 0;border-bottom:1px solid rgba(255,255,255,.07)}.section:first-child{padding-top:46px}.page-hero{padding:55px 0 28px}.page-hero .intro{max-width:820px;font-size:17px;color:#B2BBC7}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 265px;gap:48px;padding:22px 0 40px}.article-content{max-width:820px;min-width:0}.article-block{padding:10px 0 20px;scroll-margin-top:26px}.article-block h2{font-size:26px;padding-bottom:10px;border-bottom:1px solid #2a3038}.article-block p{line-height:1.9}.article-side{min-width:0}.sticky{position:sticky;top:24px}.side-panel,.card,.index-item,.mini-panel,.topic-panel{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:20px;min-width:0}.side-panel h2{font-size:18px}.side-panel a{display:block;padding:8px 0;border-bottom:1px solid #272c34;color:#C7CDD5;font-size:14px}.side-panel a:hover{color:#6EA8FF}.related{border-top:1px solid #29303a;padding:25px 0 45px}.related h2{font-size:22px}.related-links{display:flex;flex-wrap:wrap;gap:12px}.related-links a,.text-link{color:#8ED8FF;border-bottom:1px solid #425b78;padding-bottom:2px}.hero-grid,.split{display:grid;grid-template-columns:minmax(0,1.13fr) minmax(0,.87fr);align-items:center;gap:36px}.hero-grid{min-height:300px}.hero-copy h1{font-size:40px;max-width:650px}.hero-copy p{max-width:640px}.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:25px}.hero-actions a{border:1px solid #354152;border-radius:999px;padding:8px 18px}.hero-actions a:first-child{background:#5C7CFA;color:white;border-color:#5C7CFA}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-heading p{margin:0;max-width:570px;color:#9098A3;font-size:14px}.grid-two{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.grid-four{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.quick-card{padding:20px;background:#12161C;border:1px solid #282e38;border-radius:13px;min-width:0}.quick-card .num{display:block;color:#6EA8FF;font-size:13px;margin-bottom:10px}.quick-card h3,.card h3{font-size:18px;margin-bottom:10px}.quick-card p,.card p{font-size:14px;color:#AEB7C1;line-height:1.8}.quick-card a,.card a{font-size:14px}.article-feature{background:#12161C;border:1px solid #29303a;border-radius:13px;padding:28px}.article-feature h3{font-size:23px}.simple-stack{display:grid;gap:13px}.stack-link{display:block;padding:15px 18px;background:#12161C;border-left:2px solid #5C7CFA;border-radius:0 8px 8px 0;color:#F5F7FA}.stack-link span{display:block;font-size:13px;color:#9098A3}.media{display:flex;align-items:center;justify-content:center;overflow:hidden;background:#0D1015;border-radius:14px;width:100%;min-width:0;max-width:100%;border:1px solid #282e37;max-height:350px}.media img{width:100%;height:100%;max-width:100%;max-height:100%;object-fit:contain;object-position:center center;display:block}.media-wide{height:170px}.media-square{height:170px}.media-hero{height:305px}.media-banner{height:240px}.media-device{height:350px}.media-gif{height:160px}.media-placeholder{background:#0D1015}.card .media{margin-bottom:17px}.card h3{margin-top:4px}.image-caption{font-size:13px;color:#9098A3;margin-top:8px}.number-list{display:grid;gap:0}.number-item{display:grid;grid-template-columns:48px minmax(0,1fr) auto;gap:18px;padding:18px 0;border-bottom:1px solid #2c323a;align-items:start}.number-item strong{font-size:18px;color:#6EA8FF}.number-item h3{font-size:17px;margin:0 0 7px}.number-item p{font-size:14px;color:#AAB4C0;margin:0}.number-item a{font-size:14px;white-space:nowrap}.note-strip{border-left:3px solid #5C7CFA;background:#12161C;padding:18px 22px;border-radius:0 9px 9px 0}.index-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.index-item h3{margin:0 0 10px}.index-item p{font-size:14px;color:#AAB4C0}.index-item .inline-links{display:flex;gap:13px;flex-wrap:wrap}.timeline{border-left:2px solid #354152;padding-left:22px}.timeline .article-block{position:relative}.timeline .article-block:before{content:"";position:absolute;left:-29px;top:20px;width:12px;height:12px;border-radius:50%;background:#6EA8FF}.faq-list{max-width:900px;margin:0 auto 50px}.faq-list details{border:1px solid #30343c;background:#12161C;border-radius:12px;margin:12px 0;padding:14px 20px}.faq-list summary{cursor:pointer;font-size:17px;font-weight:700;color:#F5F7FA}.faq-list p{padding-top:12px;margin:0}.site-footer{background:#050608;border-top:1px solid #242934;margin-top:50px;padding-top:44px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px}.footer-grid h2{font-size:16px}.footer-grid a:not(.footer-logo){display:block;color:#A8B2BE;font-size:14px;margin:8px 0}.footer-about p{font-size:14px;color:#9098A3}.footer-logo{display:block;width:160px;height:36px;margin-bottom:17px}.footer-bottom{border-top:1px solid #252a32;padding:22px 0 27px;margin-top:30px;display:flex;justify-content:space-between;gap:20px;color:#9098A3;font-size:13px}.footer-bottom p{margin:0}.back-top{position:fixed;bottom:23px;right:23px;border:1px solid #42506c;border-radius:50%;background:#171C23;color:#fff;width:44px;height:44px;z-index:18;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s}.back-top.visible{opacity:1;visibility:visible;pointer-events:auto}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #8ED8FF;outline-offset:3px}
@media(max-width:980px){.wrap{width:calc(100% - 40px)}.article-shell{grid-template-columns:minmax(0,1fr) 215px;gap:24px}.grid-four{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-three{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.media-hero{height:265px}}
@media(max-width:768px){.hero-grid,.split{grid-template-columns:minmax(0,1fr)}.hero-grid>.media,.split>.media{grid-row:1}.article-shell{grid-template-columns:minmax(0,1fr)}.article-side .sticky{position:static}.side-panel{display:none}.grid-two{grid-template-columns:minmax(0,1fr)}.section{padding:36px 0}.page-hero{padding:36px 0 15px}.hero-copy h1{font-size:34px}.media-hero{height:230px}.media-banner{height:190px}}
@media(max-width:520px){body{font-size:15px}.wrap{width:calc(100% - 32px)}.site-header{height:62px}.header-inner{padding:0 16px}.menu-toggle{width:40px;height:40px}.header-logo{height:28px;width:min(140px,36vw)}.entry-link{height:38px;padding:0 12px;font-size:12px}.channel-bar{height:44px}.channel-inner{padding:0 12px;gap:2px}.channel-item{font-size:13px;padding:8px 10px}.hero-copy h1{font-size:29px}.page-hero h1{font-size:26px}h2,.article-block h2{font-size:22px}h3{font-size:18px}.hero-grid{gap:19px}.media-hero{height:195px}.media-wide,.media-square{height:145px}.media-banner{height:135px}.media-device{height:330px}.media-gif{height:125px}.section{padding:31px 0}.section:first-child{padding-top:28px}.grid-three,.grid-four,.index-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.quick-card,.card,.index-item{padding:13px}.quick-card h3,.card h3{font-size:16px}.quick-card p,.card p{font-size:13px}.section-heading{display:block}.number-item{grid-template-columns:30px minmax(0,1fr);gap:8px}.number-item a{grid-column:2}.article-feature{padding:20px}.footer-grid{gap:25px 18px}.footer-bottom{display:block}.footer-bottom p{margin-top:9px}.drawer-head{padding:17px 18px 8px}.drawer-scroll{padding:0 18px 28px}.drawer-intro{padding:0 18px 12px}}
@media(max-width:350px){.header-logo{width:108px;height:26px}.entry-link{padding:0 9px;font-size:11px}.grid-three,.grid-four,.index-grid{grid-template-columns:1fr}.quick-card{padding:17px}.footer-grid{grid-template-columns:1fr 1fr}.media-hero{height:175px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.site-drawer,.drawer-shade,.back-top{transition:none}}