*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#111318;color:#D5D8DF;font:16px/1.75 system-ui,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:#f2c478;text-decoration:none;touch-action:manipulation;overflow-wrap:anywhere}a:hover,a:focus-visible{color:#FF684E}button{font:inherit;cursor:pointer;touch-action:manipulation}a,button{min-height:40px}img{max-width:100%}.shell{width:min(1200px,calc(100% - 40px));margin-inline:auto}h1,h2,h3{line-height:1.3;color:#F7F8FA;letter-spacing:.01em}h1{font-size:clamp(28px,3.5vw,42px);margin:14px 0 20px}h2{font-size:clamp(22px,2.5vw,28px);margin:0 0 16px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}ul,ol{padding-left:1.45em}li{margin:0 0 8px}strong{color:#f7f8fa}.eyebrow{font-size:12px;letter-spacing:.14em;color:#D7A84B;text-transform:uppercase;font-weight:700}.muted{color:#AEB4C0}.site-header{background:#151820;border-bottom:1px solid rgba(255,255,255,.09)}.header-main{min-height:74px;display:flex;align-items:center;gap:30px}.brandmark{display:inline-flex;align-items:center;gap:10px;color:#fff;min-width:0;white-space:nowrap}.brandmark .media--logo{width:43px;height:43px;flex:none}.brandmark b{font-size:22px;line-height:1.1}.brandmark small{font-size:10px;display:block;letter-spacing:.13em;color:#AEB4C0}.desktop-primary{display:flex;flex:1;justify-content:center;align-items:center;gap:clamp(10px,2vw,25px);white-space:nowrap}.desktop-primary a,.header-secondary a{color:#d5d8df;font-weight:600;font-size:14px;display:flex;align-items:center;min-height:44px;border-bottom:2px solid transparent}.desktop-primary a.active,.header-secondary a.active{color:#fff;border-color:#F45132}.register{color:#fff;background:#F45132;border-radius:8px;display:inline-flex;justify-content:center;align-items:center;min-width:76px;min-height:42px;font-weight:700}.register:hover{background:#FF684E;color:#fff}.header-secondary{border-top:1px solid rgba(255,255,255,.07)}.header-secondary .shell{display:flex;gap:28px}.header-secondary a{font-size:13px;min-height:40px}.menu-button{display:none}.page-content{padding-top:34px;padding-bottom:85px;min-width:0}.page-intro{max-width:850px;margin:10px 0 35px}.page-intro p{font-size:17px}.section{margin:52px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section-heading h2{margin:0}.section-heading a{white-space:nowrap}.panel{background:#1A1E27;border:1px solid rgba(255,255,255,.09);border-radius:15px;padding:24px;min-width:0}.panel-soft{background:#222733;border-radius:12px;padding:18px}.accent-line{border-left:3px solid #F45132;padding-left:18px}.feature-grid,.three-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.two-grid,.content-with-side{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(260px,1fr);gap:24px}.two-grid.equal{grid-template-columns:repeat(2,minmax(0,1fr))}.reading-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.reading-links a,.pill{display:inline-flex;border:1px solid rgba(255,255,255,.15);border-radius:9px;padding:9px 15px;align-items:center;background:#222733;font-size:14px}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#12151c;aspect-ratio:16/9;min-width:0}.media>img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media--portrait{aspect-ratio:4/5}.media--app{aspect-ratio:3/4;max-width:360px;margin-inline:auto}.media--logo{aspect-ratio:auto;overflow:visible;background:transparent;border-radius:0}.media--logo img{position:static;width:100%;height:100%;object-fit:contain}.media-fallback{display:block;width:100%;height:100%;background:linear-gradient(130deg,#1b2230,#282e3b)}.media--logo .media-fallback{border-radius:9px;background:#303847}.image-article{display:grid;grid-template-columns:minmax(230px,.9fr) minmax(0,1.1fr);gap:24px;align-items:center;margin:26px 0}.image-article.reverse .media{order:2}.image-article>div{min-width:0}.image-article h3{margin-top:10px}.art-card{padding:16px;background:#1A1E27;border:1px solid rgba(255,255,255,.08);border-radius:14px;min-width:0}.art-card .media{margin-bottom:15px}.art-card p{font-size:15px}.art-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.art-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}.list-rows{padding:0;margin:0;list-style:none}.list-rows li{padding:16px 0;border-bottom:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:20px}.list-rows li:last-child{border:0}.list-rows span{color:#AEB4C0}.info-table{width:100%;border-collapse:collapse;text-align:left}.info-table th,.info-table td{padding:14px 12px;border-bottom:1px solid rgba(255,255,255,.12);vertical-align:top}.info-table th{color:#F7F8FA;background:#222733}.topic-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.topic-list article{padding:22px;background:#1A1E27;border-radius:12px}.topic-list h3{color:#fff}.article-body{max-width:830px;margin-inline:auto}.article-body section{margin:35px 0}.toc{display:flex;flex-wrap:wrap;gap:8px;margin:22px 0}.toc a{background:#222733;padding:7px 12px;border-radius:7px}.note{margin:20px 0;background:#222733;padding:16px 20px;border-left:3px solid #D7A84B;border-radius:5px}.link-list{display:grid;gap:8px}.link-list a{display:block;background:#222733;padding:12px 15px;border-radius:8px}.hero-carousel{position:relative}.hero-slide[hidden]{display:none!important}.hero-slide .media{height:clamp(220px,24vw,300px);aspect-ratio:auto}.hero-controls{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:12px}.hero-controls button{background:#222733;color:#fff;border:1px solid rgba(255,255,255,.16);border-radius:50%;width:42px;height:42px}.hero-controls .hero-dot{width:12px;height:12px;min-height:12px;padding:0;background:#777}.hero-dot[aria-pressed="true"]{background:#F45132}.hero-intro{margin:24px auto 38px;text-align:center;max-width:850px}.hero-intro h1{margin-bottom:14px}.skip-link{position:absolute;top:-100px;left:5px;background:#fff;color:#111;padding:10px;z-index:15000}.skip-link:focus{top:5px}.site-footer{background:#151820;border-top:1px solid rgba(255,255,255,.09);padding:47px 0 20px}.footer-grid{display:grid;grid-template-columns:1.8fr repeat(3,1fr);gap:34px}.footer-grid>div{display:flex;flex-direction:column;align-items:flex-start}.footer-grid h2{font-size:16px;margin:0 0 15px}.footer-grid a:not(.brandmark){color:#AEB4C0;font-size:14px;margin-bottom:5px}.footer-grid p{font-size:13px;margin:18px 0}.footer-bottom{border-top:1px solid rgba(255,255,255,.09);margin-top:22px;padding-top:18px;display:flex;justify-content:space-between;gap:20px;color:#AEB4C0;font-size:12px}.mobile-bottom,.mobile-drawer,.drawer-mask{display:none}.drawer-heading,.drawer-group{padding:20px;border-bottom:1px solid rgba(255,255,255,.12)}.drawer-heading{display:flex;justify-content:space-between;align-items:center}.drawer-heading button{background:#222733;border:0;color:#fff;border-radius:8px;padding:5px 14px}.drawer-group h2{font-size:12px;color:#D7A84B;margin:0 0 8px}.drawer-group a{display:block;padding:8px;color:#eee;min-height:43px}.drawer-open{overflow:hidden}
@media(max-width:1024px){.desktop-primary,.header-secondary{display:none}.header-main{min-height:64px;justify-content:space-between;gap:8px}.menu-button{display:flex;align-items:center;justify-content:center;min-width:44px;height:44px;background:transparent;border:1px solid rgba(255,255,255,.15);border-radius:8px;color:#fff;font-size:23px}.header-main .brandmark{margin-inline:auto}.header-main .brandmark .media--logo{width:35px;height:35px}.header-main .brandmark b{font-size:18px}.header-main .register{min-width:64px}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);max-width:100%;height:100dvh;overflow-y:auto;background:#151820;color:#F7F8FA;z-index:12000;transform:translateX(-105%);transition:transform .2s ease}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:1000;background:#151820;border-top:1px solid #333; padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:grid;place-items:center;color:#fff;font-size:13px;min-height:55px}.mobile-bottom a:last-child{background:#F45132}.site-footer{padding-bottom:95px}.footer-grid{grid-template-columns:repeat(2,1fr)}.art-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-content{padding-bottom:95px}}
@media(max-width:720px){.shell{width:calc(100% - 32px)}body{font-size:15.5px}.page-content{padding-top:22px}.page-intro p{font-size:16px}.feature-grid,.three-grid,.two-grid,.two-grid.equal,.content-with-side,.topic-list{grid-template-columns:minmax(0,1fr)}.image-article{grid-template-columns:minmax(0,1fr);gap:14px}.image-article.reverse .media{order:0}.art-grid,.art-grid.three{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.art-card{padding:11px}.art-card p{font-size:14px}.section{margin:38px 0}.panel{padding:18px}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.hero-slide .media{height:clamp(140px,40vw,180px)}.section-heading{align-items:start;flex-direction:column;gap:8px}.media--portrait{max-height:260px;aspect-ratio:4/5;margin-inline:auto}.register{font-size:14px}.brandmark small{font-size:9px}}@media(max-width:360px){.header-main .brandmark{gap:5px}.header-main .brandmark b{font-size:16px}.header-main .brandmark .media--logo{width:30px;height:30px}.header-main .register{min-width:57px}.art-grid{grid-template-columns:1fr}.art-card .media{max-height:240px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}