
:root{color-scheme:dark;--bg:#080A0D;--panel:#0D1015;--soft:#12161C;--hover:#1B2129;--text:#F5F7FA;--body:#C7CDD5;--muted:#9098A3;--blue:#6EA8FF;--border:rgba(255,255,255,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--body);font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}button{font:inherit;cursor:pointer}img{max-width:100%}.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.site-header{background:rgba(8,10,13,.96);border-bottom:1px solid var(--border);position:relative;z-index:20}.topbar{height:74px;max-width:1200px;margin:auto;display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;padding:0 24px}.menu-toggle{display:flex;width:44px;height:44px;padding:11px 9px;flex-direction:column;justify-content:space-between;background:transparent;color:var(--body);border:1px solid var(--border);border-radius:10px}.menu-toggle span{display:block;height:2px;background:currentColor;border-radius:3px}.brand{justify-self:center;display:flex;align-items:center;justify-content:center;min-width:0}.brand img{display:block;width:auto;max-width:175px;height:36px;object-fit:contain}.brand strong{color:var(--text);font-size:23px;white-space:nowrap}.enter-btn{justify-self:end;height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:999px;background:#5C7CFA;color:white;font-weight:700;white-space:nowrap;font-size:14px}.enter-btn:hover{background:#7390FF;color:white}.channels{background:#0D1015;border-top:1px solid var(--border);height:47px;max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-width:thin}.channel-inner{display:flex;min-width:max-content;max-width:1200px;margin:auto;justify-content:space-around;gap:24px;padding:0 24px;height:100%}.channels a{display:flex;align-items:center;border-bottom:2px solid transparent;font-size:14px;white-space:nowrap}.channels a.active,.channels a:hover{color:var(--blue);border-bottom-color:var(--blue)}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:29;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer{position:fixed;z-index:30;top:0;bottom:0;left:0;width:420px;max-width:86vw;background:#0D1015;transform:translateX(-103%);visibility:hidden;pointer-events:none;transition:transform .25s,visibility .25s;overflow-y:auto;box-shadow:10px 0 24px rgba(0,0,0,.3)}body.drawer-open{overflow:hidden}body.drawer-open .drawer{transform:translateX(0);visibility:visible;pointer-events:auto}body.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;min-height:80px;padding:16px 23px;border-bottom:1px solid var(--border)}.drawer-brand img{height:34px;width:auto;object-fit:contain}.close-menu{width:40px;height:40px;border:1px solid var(--border);border-radius:9px;color:var(--text);background:var(--soft);font-size:29px;line-height:1}.drawer-nav{padding:7px 23px 30px}.drawer-nav section{border-bottom:1px solid var(--border);padding:10px 0 17px}.drawer-nav h2{font-size:14px;color:var(--muted);margin:9px 0}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px}.drawer-links a{font-size:14px;padding:7px 9px;border-left:2px solid transparent}.drawer-links a.active{color:var(--blue);border-color:var(--blue)}main{padding-top:30px;padding-bottom:70px;min-height:60vh}h1,h2,h3{color:var(--text);line-height:1.4;margin-top:0;overflow-wrap:anywhere}h1{font-size:34px;line-height:1.35}h2{font-size:26px}h3{font-size:19px}p{margin:0 0 16px}article p{line-height:1.85}.eyebrow{color:var(--blue);font-size:13px;letter-spacing:.09em;font-weight:700}.lead{font-size:17px;line-height:1.85;max-width:830px}.hero,.feature-split,.two-col{display:grid;grid-template-columns:1.08fr .92fr;gap:25px;align-items:center}.hero{padding:28px;background:linear-gradient(125deg,#12161C,#0D1015);border:1px solid var(--border);border-radius:14px}.hero h1{font-size:42px}.hero .lead{max-width:620px}.hero-links{display:flex;gap:16px;flex-wrap:wrap;margin-top:20px}.hero-links a,.text-link{color:var(--blue);font-weight:600}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:14px;background:#0D1015;border:1px solid var(--border)}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media-square{aspect-ratio:1/1}.media-wide{aspect-ratio:16/9}.media-banner{aspect-ratio:16/7}.media-device{aspect-ratio:9/16;max-height:360px;margin:auto;width:auto;max-width:100%;min-width:170px}.media-placeholder{position:absolute;inset:0;background:linear-gradient(145deg,#171C23,#0D1015);border:1px solid rgba(255,255,255,.03);border-radius:inherit}.hero-media .media{max-height:340px}.section{margin-top:48px}.section-heading{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:20px}.section-heading h2{margin:0}.section-heading a{font-size:14px;color:var(--blue)}.panel{background:var(--panel);border:1px solid var(--border);border-radius:13px;padding:23px}.panel.soft{background:var(--soft)}.panel h3{margin-bottom:10px}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}.grid.four{grid-template-columns:repeat(4,minmax(0,1fr))}.card{min-width:0}.card .media{margin-bottom:12px}.card h3{font-size:18px}.card p{font-size:15px}.article-list{list-style:none;margin:0;padding:0;counter-reset:article}.article-list li{counter-increment:article;display:grid;grid-template-columns:42px 1fr;gap:12px;padding:19px 0;border-bottom:1px solid var(--border)}.article-list li:before{content:counter(article,decimal-leading-zero);color:var(--blue);font-size:20px;font-weight:700}.article-list li a{font-weight:700;color:var(--text)}.article-list li a:hover{color:var(--blue)}.article-list li p{font-size:14px;color:var(--muted);margin:4px 0}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:32px;align-items:start}.article-body{min-width:0}.article-body>section{margin:34px 0}.article-body h2{font-size:25px;margin-bottom:15px}.article-body p{font-size:16px}.sidebar{position:sticky;top:20px}.sidebar a,.related a{display:block;padding:9px 0;border-bottom:1px solid var(--border);color:var(--body)}.sidebar a:hover,.related a:hover{color:var(--blue)}.aside-label{font-size:13px;letter-spacing:.06em;color:var(--blue)}.page-intro{margin:10px 0 36px;max-width:900px}.page-intro h1{margin:10px 0 15px}.article-wide{max-width:850px;margin:auto}.article-wide .page-intro{max-width:850px}.image-grid .media{height:auto;max-height:185px;aspect-ratio:16/9}.image-grid .media-square{aspect-ratio:1/1;max-height:185px}.compact-media .media{max-height:240px}.banner-box .media{max-height:260px}.notice{border-left:3px solid var(--blue);padding:14px 19px;background:var(--soft);margin:24px 0}.faq-list details{border-bottom:1px solid var(--border);padding:14px 0}.faq-list summary{cursor:pointer;font-weight:700;color:var(--text);font-size:17px}.faq-list p{margin:10px 0}.site-footer{background:#050608;border-top:1px solid var(--border);padding:45px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:38px}.footer-grid h2{font-size:17px;margin:0 0 15px}.footer-grid a{display:block;font-size:14px;margin:7px 0}.footer-grid p{font-size:14px}.footer-logo img{height:34px;width:auto;object-fit:contain}.footer-bottom{border-top:1px solid var(--border);margin-top:30px;padding-top:20px;display:flex;justify-content:space-between;gap:24px;font-size:13px;color:var(--muted)}.footer-bottom p{margin:0}.back-top{position:fixed;right:20px;bottom:20px;width:42px;height:42px;border:1px solid var(--border);border-radius:50%;background:#171C23;color:white;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:10}.back-top.shown{opacity:1;visibility:visible;pointer-events:auto}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--blue);outline-offset:3px}@media(max-width:980px){.article-shell{grid-template-columns:minmax(0,1fr) 240px}.grid.four{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{gap:22px}}@media(max-width:767px){body{font-size:15px}.container{width:calc(100% - 32px)}.topbar{height:64px;padding:0 16px}.menu-toggle{width:40px;height:40px}.brand img{height:28px;max-width:125px}.brand strong{font-size:18px}.enter-btn{height:40px;padding:0 12px;font-size:12px}.channels{height:46px}.channel-inner{gap:24px;padding-inline:16px}main{padding-top:19px;padding-bottom:42px}.hero,.feature-split,.two-col{grid-template-columns:1fr}.hero{padding:17px}.hero .hero-media{grid-row:1}.hero h1{font-size:30px}.hero-media .media{max-height:210px}.section{margin-top:32px}.section-heading h2,h2{font-size:21px}h1{font-size:27px}.lead{font-size:15px}.grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.grid.two{grid-template-columns:1fr}.panel{padding:16px}.card h3{font-size:16px}.card p{font-size:14px}.article-shell{grid-template-columns:1fr}.sidebar{position:static}.article-body h2{font-size:22px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 16px}.footer-bottom{display:block}.footer-bottom p{margin-top:8px}.image-grid .media,.image-grid .media-square{max-height:165px}.banner-box .media{max-height:145px}.compact-media .media{max-height:195px}.section-heading{align-items:center}.media-device{max-height:360px}.drawer{width:min(86vw,340px)}}@media(max-width:370px){.topbar{padding-inline:12px}.enter-btn{padding:0 10px;font-size:11px}.brand img{max-width:108px}.hero h1{font-size:28px}.grid{gap:9px}.grid .panel{padding:12px}.section-heading{gap:8px}.section-heading a{font-size:12px}}@media(min-width:768px) and (max-width:1199px){.container{width:calc(100% - 40px)}}
