*{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:#F5F7FA}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #8ED8FF;outline-offset:3px}button{font:inherit;cursor:pointer}.shell{max-width:1200px;margin:0 auto;padding:0 24px;min-width:0}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:#F5F7FA;line-height:1.38}h1{font-size:34px;letter-spacing:-.02em}h2{font-size:26px}h3{font-size:19px}p{margin-bottom:16px}small,.muted,.eyebrow{color:#9098A3}.eyebrow{letter-spacing:.14em;font-size:13px;text-transform:uppercase;font-weight:700}.site-header{background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.topbar{height:76px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;flex:0 0 218px;min-width:0;color:#F5F7FA}.brand-copy{line-height:1.15;display:grid;gap:4px}.brand-copy b{font-size:19px}.brand-copy small{font-size:9px;letter-spacing:.02em;white-space:nowrap}.logo{display:flex;align-items:center;justify-content:center;min-width:0;max-width:100%;height:36px;min-height:30px;background:transparent;border:0;border-radius:0}.logo img{display:block;max-width:100%;height:100%;width:auto;object-fit:contain}.placeholder{font-size:13px;color:#778391;padding:14px;text-align:center}.logo .placeholder{font-size:10px;padding:0}.desktop-nav{display:flex;gap:19px;align-items:center;flex:1;justify-content:center;white-space:nowrap}.desktop-nav a{color:#C7CDD5;font-size:14px;padding:6px 0;border-bottom:2px solid transparent}.desktop-nav a:hover,.desktop-nav a.active{color:#6EA8FF;border-color:#6EA8FF}.enter{background:#5C7CFA;color:#fff;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;height:42px;white-space:nowrap;font-size:14px;font-weight:700}.enter:hover{background:#7390FF;color:#fff}.menu-trigger{display:none}.quickbar{background:#10141A;border-bottom:1px solid rgba(255,255,255,.09)}.quick-links{min-height:44px;display:flex;align-items:center;gap:30px}.quick-links a{font-size:14px;color:#AAB5C2}.quick-links a:hover{color:#8ED8FF}.mobile-quick{display:none}.content{padding-top:35px;padding-bottom:65px}.breadcrumb{font-size:13px;color:#9098A3;margin-bottom:22px}.breadcrumb span{padding:0 10px;color:#576271}.breadcrumb strong{font-weight:400;color:#B7C1CC}.page-lead{max-width:900px;margin-bottom:38px}.page-lead p{font-size:17px;color:#B9C4D1;max-width:820px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:58px;align-items:start}.article{min-width:0;max-width:820px}.article-section{margin:0 0 45px;padding-top:6px;border-top:1px solid rgba(255,255,255,.12)}.article-section h2{margin-top:18px}.article-section p{max-width:790px}.side-index{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:14px;padding:22px;position:sticky;top:20px}.side-index h2{font-size:17px}.side-index a{display:block;padding:7px 0;font-size:14px;color:#AEBAC7;border-bottom:1px solid rgba(255,255,255,.06)}.side-index a:hover{color:#8ED8FF}.related{border-top:1px solid rgba(255,255,255,.16);padding-top:28px;margin-top:40px}.related h2{font-size:21px}.related-links{display:flex;flex-wrap:wrap;gap:10px}.related-links a,.text-link{border:1px solid rgba(255,255,255,.16);border-radius:999px;padding:7px 16px;font-size:14px}.visual{width:100%;min-width:0;max-width:100%;min-height:120px;display:flex;align-items:center;justify-content:center;background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:13px;overflow:hidden;padding:9px}.visual img{width:auto;max-width:100%;height:auto;max-height:240px;object-fit:contain;object-position:center center;display:block}.visual.hero-visual{height:300px}.hero-visual img{max-height:100%}.visual.thumb{height:175px}.thumb img{max-height:100%}.visual.device{max-width:270px;min-height:230px;max-height:340px;margin:auto}.device img{max-height:320px}.visual.gif-visual{min-height:120px;max-height:175px}.gif-visual img{max-height:165px}.visual.logo{min-height:0;padding:0}.visual.logo img{max-height:100%}.figure{margin:18px 0 30px;min-width:0;max-width:100%}.figure figcaption{color:#9098A3;font-size:13px;line-height:1.7;margin-top:9px}.figure-small{max-width:540px}.feature-figure{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:28px;align-items:center;margin-bottom:42px}.feature-figure .figure{margin:0}.section-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.panel{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:24px;min-width:0}.panel h3{margin:0 0 12px}.panel p{font-size:15px}.panel a{font-size:14px}.hero{display:grid;grid-template-columns:52fr 48fr;gap:35px;align-items:center;margin:15px 0 60px}.hero h1{font-size:41px}.hero p{font-size:17px;max-width:590px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:25px}.hero-actions a{border-bottom:1px solid #5C7CFA;padding:3px 0}.home-section{margin:50px 0 62px}.home-section>.section-header{max-width:790px;margin-bottom:28px}.section-no{font-size:12px;color:#6EA8FF;letter-spacing:.2em;font-weight:700}.feature-row{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:start}.feature-row.reverse{grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr)}.feature-row .article-section{margin-bottom:20px}.note-list{list-style:none;margin:0;padding:0}.note-list li{border-top:1px solid rgba(255,255,255,.12);padding:14px 0}.note-list b{display:inline-block;color:#6EA8FF;min-width:32px}.note-list a{color:#F5F7FA}.image-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:19px}.image-grid .figure{margin:0}.image-grid .figure figcaption{font-size:14px}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.gallery-grid .figure{margin:0}.gallery-grid .visual{height:210px}.gallery-grid .visual img{max-height:100%}.gallery-grid h3{font-size:17px;margin:12px 0 5px}.gallery-grid p{font-size:14px;color:#B5C0CB}.gallery-grid .figure figcaption{color:#B5C0CB}.index-stack{border-top:1px solid rgba(255,255,255,.12)}.index-item{display:grid;grid-template-columns:44px minmax(0,1fr) 120px;gap:20px;padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12)}.index-item>span{color:#6EA8FF}.index-item h3{margin:0 0 8px}.index-item p{margin:0;font-size:15px}.index-item>a{align-self:start;text-align:right;font-size:14px}.faq-list details{border-bottom:1px solid rgba(255,255,255,.12);padding:18px 0}.faq-list summary{cursor:pointer;color:#F5F7FA;font-size:17px;font-weight:700}.faq-list details p{margin:12px 0 0;max-width:850px}.comparison{width:100%;border-collapse:collapse;margin:22px 0 30px}.comparison th,.comparison td{padding:15px;border:1px solid rgba(255,255,255,.12);text-align:left;vertical-align:top}.comparison th{color:#F5F7FA;background:#171C23}.footer{background:#050608;border-top:1px solid rgba(255,255,255,.09);padding:45px 0 22px}.footer-columns{display:grid;grid-template-columns:1fr 1.6fr 1fr;gap:48px}.footer-columns h2{font-size:17px}.footer-columns p{font-size:14px;color:#9098A3}.footer-brand{display:flex;gap:12px;align-items:center;color:#F5F7FA}.footer-links{display:flex;flex-wrap:wrap;gap:9px 18px}.footer-links a{font-size:13px;color:#A9B4C1}.copyright{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.09);padding-top:20px;margin-top:32px;color:#9098A3;font-size:12px}.copyright p{margin:0}.menu-trigger,.drawer-close{background:none;border:0;color:#F5F7FA}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:99;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s}.drawer-overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;z-index:100;inset:0 auto 0 0;width:min(86vw,390px);max-width:390px;background:#0D1015;border-right:1px solid rgba(255,255,255,.13);overflow-y:auto;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s;padding:25px}.drawer.is-open{transform:translateX(0);visibility:visible;pointer-events:auto}.menu-open{overflow:hidden}.drawer-head{display:flex;align-items:center;justify-content:space-between}.drawer-brand{display:flex;align-items:center;gap:12px;color:#F5F7FA}.drawer-close{font-size:29px}.drawer-group{margin-top:30px}.drawer-group h2{font-size:14px;color:#9098A3;letter-spacing:.12em}.drawer-group div{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 14px}.drawer-group a{color:#D0D8E1;font-size:14px;padding:5px 0}.to-top{position:fixed;right:20px;bottom:22px;border:1px solid rgba(255,255,255,.17);border-radius:50%;background:#171C23;color:#F5F7FA;width:43px;height:43px} @media(max-width:1100px){.desktop-nav{gap:11px}.brand{flex-basis:190px}.desktop-nav a{font-size:13px}}@media(max-width:979px){.shell{padding-left:20px;padding-right:20px}.topbar{height:64px;justify-content:space-between;position:relative}.menu-trigger{display:grid;gap:5px;align-content:center;justify-content:center;width:40px;height:40px;padding:8px;flex:0 0 40px}.menu-trigger span{width:21px;height:2px;background:#E4EDF7;display:block}.desktop-nav,.brand-copy,.quick-links{display:none}.topbar>.brand{position:absolute;left:50%;transform:translateX(-50%);width:100px;flex-basis:auto;justify-content:center;pointer-events:auto}.topbar>.brand .logo{height:28px;max-width:100px}.enter{height:40px;padding:0 14px;font-size:13px}.mobile-quick{display:flex;align-items:center;gap:26px;white-space:nowrap;overflow-x:auto;scrollbar-width:none;height:44px}.mobile-quick::-webkit-scrollbar{display:none}.mobile-quick a{font-size:14px;color:#B8C5D1}.page-layout{grid-template-columns:1fr}.side-index{position:static;order:-1}.side-index div{display:flex;flex-wrap:wrap;gap:5px 18px}.side-index a{border:0}.footer-columns{grid-template-columns:1fr 1.7fr}.footer-columns nav:last-child{grid-column:1/-1}.hero h1{font-size:36px}}@media(max-width:767px){.shell{padding-left:16px;padding-right:16px}.content{padding-top:25px;padding-bottom:40px}.hero,.feature-row,.feature-row.reverse,.feature-figure{grid-template-columns:1fr;gap:20px}.hero{margin:0 0 42px}.hero .hero-visual{grid-row:1}.hero h1{font-size:29px}.hero p,.page-lead p{font-size:16px}.visual.hero-visual{height:195px}.hero-actions{margin-top:18px}.home-section{margin:30px 0 42px}.section-grid{grid-template-columns:1fr}.image-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.gallery-grid .visual{height:155px}.visual.thumb{height:145px}.visual.device{max-width:220px;max-height:340px}.visual.gif-visual{max-height:145px}.gif-visual img{max-height:135px}.panel{padding:17px}h1{font-size:27px}h2{font-size:22px}h3{font-size:18px}.article-section{margin-bottom:31px}.index-item{grid-template-columns:30px minmax(0,1fr);gap:12px}.index-item>a{grid-column:2;text-align:left}.footer-columns{grid-template-columns:1fr 1fr;gap:25px}.footer-columns section{grid-column:1/-1}.footer-columns nav:last-child{grid-column:auto}.copyright{display:block}.copyright p{margin:6px 0}.comparison{font-size:13px}.comparison th,.comparison td{padding:10px}}@media(max-width:370px){.topbar>.brand{max-width:78px}.topbar>.brand .logo{max-width:78px}.enter{padding:0 10px;font-size:12px}.gallery-grid{grid-template-columns:1fr}.image-grid{grid-template-columns:1fr}.drawer{padding:18px}body{font-size:15px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}