:root{color-scheme:dark;--bg:#080A0D;--nav:#0D1015;--muted:#12161C;--card:#171C23;--hover:#1B2129;--fg:#F5F7FA;--body:#C7CDD5;--sub:#9098A3;--blue:#5C7CFA;--light:#6EA8FF;--ice:#8ED8FF;--line:rgba(255,255,255,.09)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:inherit;text-decoration:none}a:hover{color:var(--ice)}button{font:inherit;cursor:pointer}img{max-width:100%}.container{width:min(1180px,calc(100% - 48px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:100;background:var(--nav);box-shadow:0 2px 14px rgba(0,0,0,.2)}.topbar{height:70px;display:flex;align-items:center;gap:30px}.brand{display:flex;align-items:center;min-width:110px;flex:none;color:white;font-size:23px;letter-spacing:.03em}.brand img{max-height:38px;max-width:150px;width:auto;height:auto;object-fit:contain}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:32px;min-width:0;flex:1;white-space:nowrap}.desktop-nav a{position:relative;font-size:15px;font-weight:600;color:var(--body);padding:21px 0}.desktop-nav a:hover,.desktop-nav a[aria-current]{color:var(--light)}.desktop-nav a[aria-current]:after{position:absolute;content:"";background:var(--light);height:2px;width:23px;bottom:13px;left:0}.entry-btn,.btn{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:white!important;border-radius:999px;padding:0 23px;height:41px;white-space:nowrap;font-size:14px;font-weight:700}.entry-btn:hover,.btn:hover{background:#7390FF}.subnav{background:var(--muted)}.subnav-inner{display:flex;gap:28px;overflow-x:auto;white-space:nowrap;height:44px;align-items:center;scrollbar-width:thin}.subnav a{color:var(--sub);font-size:13px;flex:none}.subnav a:hover,.subnav a[aria-current]{color:var(--ice)}.hamburger{display:none}.mobile-drawer,.drawer-mask{display:none}.kicker{font-size:13px;color:var(--ice);font-weight:700;letter-spacing:.13em;text-transform:uppercase}.hero{display:grid;grid-template-columns:1.14fr .86fr;align-items:center;gap:38px;padding-top:35px;padding-bottom:31px}.hero h1{font-size:38px;line-height:1.28;margin:10px 0 18px;color:var(--fg)}.hero p{margin:0 0 24px;color:var(--body);max-width:630px}.hero .media{max-height:300px}.section{margin:44px auto}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:18px}.section-head h2,.section h2{font-size:25px;line-height:1.36;color:var(--fg);margin:0 0 17px}.section-head h2{margin:0}.section-head>a{font-size:14px;color:var(--ice)}h3{color:var(--fg);line-height:1.45}p{margin:0 0 15px}.muted{color:var(--sub)}.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.card{min-width:0;border:1px solid var(--line);border-radius:13px;background:var(--card);padding:22px}.card:hover{border-color:rgba(110,168,255,.25)}.card h3{font-size:18px;margin:0 0 11px}.card p{font-size:15px;line-height:1.75;color:var(--body);margin:0}.card-link{display:inline-block;color:var(--ice);font-size:14px;margin-top:14px}.media{position:relative;min-width:0;width:100%;overflow:hidden;background:#0D1015;border-radius:12px;display:flex;align-items:center;justify-content:center}.media img{display:block;width:100%;height:100%;object-fit:contain;object-position:center}.media-square{aspect-ratio:1/1}.media-landscape{aspect-ratio:16/9}.media-topic{aspect-ratio:4/3}.media-banner{aspect-ratio:16/7}.media-device{aspect-ratio:9/16}.media-natural img{width:100%;height:auto;max-height:300px;object-fit:contain;margin:auto}.media-placeholder{display:block;width:100%;height:100%;min-height:135px;background:linear-gradient(135deg,#171C23,#0D1015)}.media-natural .media-placeholder{aspect-ratio:16/9}.picture-card{background:var(--card);border:1px solid var(--line);padding:12px;border-radius:13px;min-width:0}.picture-card h3{font-size:17px;margin:12px 2px 6px}.picture-card p{font-size:13px;margin:0 2px 5px;color:var(--sub)}.pill{color:var(--ice);font-size:12px;letter-spacing:.06em}.feature-split{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}.feature-split .text-panel{padding:12px 8px}.reading-list{list-style:none;padding:0;margin:0}.reading-list li{display:grid;grid-template-columns:38px minmax(0,1fr);border-bottom:1px solid var(--line);padding:14px 0;gap:8px}.reading-list .number{color:var(--light);font-size:15px}.reading-list h3{margin:0 0 5px;font-size:17px}.reading-list p{font-size:14px;margin:0;color:var(--sub)}.hero-poster{max-width:1080px;margin:0 auto}.banner .media img{max-height:260px;height:auto}.article-header{padding:45px 0 25px;border-bottom:1px solid var(--line)}.article-header h1{font-size:33px;line-height:1.38;color:var(--fg);margin:9px 0 14px}.article-header p{max-width:790px;font-size:17px;line-height:1.8}.crumb{font-size:13px;color:var(--sub)}.crumb a{color:var(--ice)}.article-layout{display:grid;grid-template-columns:minmax(0,780px) minmax(220px,1fr);gap:40px;align-items:start;padding-top:30px}.article-body h2{margin:33px 0 12px;font-size:24px}.article-body h3{font-size:19px}.article-body p{line-height:1.85}.article-body .lead{font-size:17px;color:#DFE6EF}.article-body .media{margin:24px 0}.article-body>.media img{max-height:280px}.article-sidebar{position:sticky;top:150px;padding:24px;border:1px solid var(--line);border-radius:13px;background:var(--card)}.article-sidebar h2{font-size:17px;color:var(--fg);margin:0 0 10px}.article-sidebar a{display:block;font-size:14px;padding:8px 0;border-bottom:1px solid var(--line)}.article-sidebar a:last-child{border-bottom:0}.article-related{margin:40px 0}.note{padding:18px 22px;border-left:3px solid var(--blue);background:var(--muted);font-size:14px;color:var(--body);border-radius:0 10px 10px 0}.site-footer{background:#050608;margin-top:55px;padding:42px 0 19px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px}.footer-intro p{font-size:13px;color:var(--sub);margin:15px 0}.footer-links h3{margin:0 0 12px;font-size:15px}.footer-links a{display:block;color:var(--sub);font-size:13px;padding:3px 0}.footer-bottom{margin-top:28px;padding-top:17px;border-top:1px solid var(--line);font-size:12px;color:var(--sub);display:flex;gap:14px;justify-content:space-between}.footer-bottom p{margin:0}.mobile-bottom{display:none}.faq-list dt{font-weight:700;color:var(--fg);margin:20px 0 5px}.faq-list dd{margin:0;border-bottom:1px solid var(--line);padding-bottom:15px}.mobile-visual{max-width:220px;margin-inline:auto}.gif-row .media{max-height:190px}.banner{margin-top:40px;margin-bottom:40px}.accent{color:var(--ice)}
@media(max-width:1100px){.desktop-nav{gap:20px}.topbar{gap:18px}.footer-grid{gap:23px}.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:980px){.container{width:calc(100% - 40px)}.topbar{height:58px;justify-content:space-between;gap:14px}.desktop-nav{display:none}.hamburger{border:0;background:transparent;width:36px;height:36px;display:flex;flex-direction:column;gap:5px;justify-content:center;align-items:center;padding:0}.hamburger span{display:block;background:var(--fg);width:22px;height:2px;border-radius:2px}.topbar .brand{margin-right:auto;min-width:0}.brand img{max-height:29px;max-width:135px}.entry-btn{height:36px;min-width:76px;padding:0 13px;font-size:13px}.mobile-drawer,.drawer-mask{display:none}@media(max-width:980px){.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);height:100dvh;background:#0D1015;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;overflow-y:auto}.mobile-drawer.is-open{transform:translateX(0)}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.65);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}body.drawer-open{overflow:hidden}}.drawer-head{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid var(--line)}.drawer-close{border:0;background:transparent;color:white;font-size:29px}.drawer-group{padding:11px 22px;border-bottom:1px solid var(--line)}.drawer-group h3{font-size:14px;color:var(--ice);margin:5px 0}.drawer-group a{display:block;padding:7px 0;font-size:14px}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;height:60px;z-index:100;background:#0D1015;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;justify-content:center;align-items:center;font-size:13px}.mobile-bottom a[aria-current]{color:var(--light)}body{padding-bottom:60px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-bottom{display:block}.article-layout{grid-template-columns:minmax(0,1fr)}.article-sidebar{position:static}.hero{gap:22px}.hero h1{font-size:31px}}
@media(max-width:640px){body{font-size:15px}.container{width:calc(100% - 32px)}.topbar{gap:9px}.hero{display:flex;flex-direction:column-reverse;align-items:stretch;padding-top:23px;gap:21px}.hero h1{font-size:28px;margin:8px 0 12px}.hero p{font-size:15px}.hero .media{max-height:210px}.section{margin:30px auto}.section-head h2,.section h2{font-size:21px}.grid{gap:12px}.grid-3,.grid-4,.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.card{padding:15px}.card h3{font-size:16px}.card p{font-size:13px}.picture-card{padding:8px}.picture-card h3{font-size:15px;margin-top:9px}.picture-card .media{max-height:none}.feature-split{grid-template-columns:1fr;gap:10px}.feature-split .text-panel{padding:9px 0}.article-header{padding:28px 0 17px}.article-header h1{font-size:26px}.article-header p{font-size:15px}.article-layout{padding-top:18px;gap:22px}.article-body h2{font-size:21px;margin-top:26px}.article-body .lead{font-size:16px}.banner .media img{max-height:150px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:23px}.footer-intro{grid-column:1/-1}.footer-links a{font-size:12px}.site-footer{padding-top:28px}.section-head{gap:8px}.section-head>a{font-size:12px}}
@media(max-width:355px){.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}.picture-card .media{max-height:260px}.entry-btn{padding:0 10px}.brand img{max-width:105px}.hero h1{font-size:25px}.topbar{gap:6px}}

.article-photo{margin:0 0 24px}.article-photo img{width:100%;height:auto;object-fit:contain}.picture-card .media-natural img{width:100%;height:auto;max-height:280px;object-fit:contain}