:root{color-scheme:dark;--bg:#080A0D;--surface:#0D1015;--panel:#12161C;--panel2:#171C23;--hover:#1B2129;--text:#F5F7FA;--body:#C7CDD5;--muted:#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:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif}img{display:block;max-width:100%;height:auto}a{color:var(--ice);text-decoration:none}a:hover{color:#b5e7ff}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ice);outline-offset:3px}button{font:inherit;cursor:pointer}.wrap{width:min(1200px,calc(100% - 48px));margin-inline:auto;min-width:0}.skip-link{position:absolute;top:-80px;left:12px;background:var(--blue);padding:10px;z-index:200}.skip-link:focus{top:12px}
.site-header{height:76px;background:rgba(8,10,13,.96);border-bottom:1px solid var(--line);position:relative;z-index:30}.header-inner{height:100%;display:flex;align-items:center;gap:20px;min-width:0}.brand{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;flex:0 0 225px;min-width:0;color:var(--text);line-height:1.2}.brand img{max-height:36px;width:auto;object-fit:contain}.brand strong{font-size:23px}.brand small{font-size:10px;letter-spacing:.11em;color:var(--muted);margin-top:5px;white-space:nowrap}.desktop-nav{display:flex;gap:clamp(12px,1.5vw,23px);align-items:center;white-space:nowrap;flex:1;justify-content:center}.desktop-nav a{font-size:14px;color:var(--body);padding:26px 0 23px;border-bottom:2px solid transparent}.desktop-nav a.active,.desktop-nav a:hover{color:var(--light);border-bottom-color:var(--light)}.enter-button{color:white;background:var(--blue);border-radius:999px;padding:7px 20px;min-height:42px;display:flex;align-items:center;justify-content:center;white-space:nowrap;font-size:14px;font-weight:700;flex-shrink:0}.enter-button:hover{background:#7390FF;color:white}.menu-button{display:none;border:1px solid var(--line);width:40px;height:40px;flex:0 0 40px;border-radius:10px;background:var(--panel);padding:10px}.menu-button span{display:block;height:2px;margin:4px 0;background:var(--text);border-radius:3px}.quick-band{background:#10141A;border-bottom:1px solid var(--line)}.quick-inner{display:flex;align-items:center;gap:28px;min-height:44px;white-space:nowrap}.quick-inner a{font-size:13px;color:var(--muted)}.quick-inner a:hover{color:var(--light)}
.drawer-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.68);z-index:70;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer{position:fixed;left:0;top:0;bottom:0;width:min(390px,86vw);overflow-y:auto;padding:22px;background:var(--surface);border-right:1px solid var(--line);z-index:80;transform:translateX(-102%);visibility:hidden;pointer-events:none;transition:transform .2s,visibility .2s}.drawer-open{overflow:hidden}.drawer-open .drawer-backdrop{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid var(--line)}.drawer-brand{font-size:22px;font-weight:bold;color:white}.drawer-brand img{max-height:36px;width:auto;object-fit:contain}.drawer-close{border:1px solid var(--line);background:var(--panel2);color:var(--text);font-size:24px;width:38px;height:38px;border-radius:10px}.drawer-group{padding:20px 0 4px}.drawer-group h2{font-size:13px;letter-spacing:.1em;color:var(--muted);margin:0 0 10px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:3px 12px}.drawer-links a{color:var(--body);font-size:14px;padding:7px 0}.drawer-links a:hover{color:var(--light)}
.site-main{padding-bottom:72px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:11px;align-items:center;margin:24px 0 20px;font-size:13px;color:var(--muted)}.breadcrumbs a{color:var(--muted)}.breadcrumbs strong{color:var(--body);font-weight:400}h1,h2,h3{color:var(--text);line-height:1.4;margin-top:0}h1{font-size:clamp(32px,3vw,42px);line-height:1.3;letter-spacing:-.025em}h2{font-size:26px}h3{font-size:19px}p{margin:0 0 17px}section{min-width:0}.eyebrow{font-size:12px;letter-spacing:.19em;text-transform:uppercase;color:var(--light);font-weight:700;margin:0 0 13px}.lead{font-size:17px;color:var(--body);line-height:1.85;max-width:790px}.page-heading{margin:36px 0 37px;padding:0 0 25px;border-bottom:1px solid var(--line)}.page-heading h1{font-size:35px;max-width:940px}.page-heading p{max-width:790px}.section-title{display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:22px}.section-title small{color:var(--muted);font-size:12px;letter-spacing:.1em}.section-block{margin:56px 0}.prose-section{margin-bottom:36px}.prose-section h2{margin-bottom:17px}.prose-section p{line-height:1.84}.longform{max-width:800px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:52px;align-items:start}.article-layout>.longform{max-width:none}.toc{position:sticky;top:30px;border-top:2px solid var(--blue);background:var(--panel);padding:20px;border-radius:0 0 13px 13px}.toc h2{font-size:16px}.toc a{display:block;margin:9px 0;color:var(--body);font-size:14px}.toc a:hover{color:var(--ice)}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:35px;align-items:center}.split-uneven{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr)}.split>*{min-width:0}.text-panel,.editorial-card{background:var(--panel);border:1px solid var(--line);padding:24px;border-radius:13px;min-width:0}.text-panel h3,.editorial-card h3{margin-bottom:11px}.subtle{color:var(--muted);font-size:14px}.border-top{border-top:1px solid var(--line);padding-top:24px}.linkline{display:flex;flex-wrap:wrap;gap:10px 25px;margin-top:15px}.linkline a{font-size:14px}.linkline a:after{content:' ↗';font-size:12px}.media-frame{margin:0;min-width:0;max-width:100%;background:var(--surface);border:1px solid var(--line);border-radius:13px;overflow:hidden;padding:12px}.media-frame img{display:block;width:100%;height:auto;max-width:100%;max-height:245px;object-fit:contain;object-position:center center;margin:0 auto}.media-frame figcaption{font-size:13px;color:var(--muted);line-height:1.6;margin:12px 4px 2px}.image-placeholder{min-height:145px;display:grid;place-items:center;color:#6f7885;font-size:13px;text-align:center}.hero-media img{max-height:245px}.hero-media .image-placeholder{min-height:245px}.thumb img{max-height:180px}.thumb .image-placeholder{min-height:150px}.feature-media img{max-height:240px}.device-media{max-width:270px;margin-inline:auto}.device-media img{max-height:340px}.device-media .image-placeholder{min-height:290px}.gif-media img{max-height:175px}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.gallery-grid>*{min-width:0}.gallery-grid .media-frame img{max-height:225px}.gallery-grid .media-frame figcaption{min-height:46px}.gallery-grid .wide{grid-column:span 2}.gallery-grid .wide img{max-height:260px}.feature-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:23px}.three-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.steps{counter-reset:steps;display:grid;gap:15px}.step{display:grid;grid-template-columns:43px minmax(0,1fr);gap:17px;padding:18px 0;border-top:1px solid var(--line)}.step:before{counter-increment:steps;content:counter(steps,decimal-leading-zero);color:var(--light);font-size:19px;font-weight:700}.step h2,.step h3{font-size:19px;margin-bottom:7px}.step p{margin:0}.comparison{width:100%;border-collapse:collapse;margin:25px 0 35px;font-size:14px}.comparison th,.comparison td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:14px 13px}.comparison th{color:var(--text);background:var(--panel2)}.comparison td:first-child{color:var(--ice);white-space:nowrap}.related{border-top:1px solid var(--line);margin:48px 0 0;padding:30px 0}.related h2{font-size:22px}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.related-item{border-left:2px solid #334c84;padding:2px 14px}.related-item a{font-weight:700}.related-item p{color:var(--muted);font-size:13px;margin:6px 0 0;line-height:1.65}.index-entry{display:grid;grid-template-columns:48px minmax(0,1fr);gap:18px;border-top:1px solid var(--line);padding:22px 0}.index-entry>span{font-size:18px;color:var(--light)}.index-entry h3{margin:0 0 8px}.index-entry p{margin:0}.faq-list details{border-bottom:1px solid var(--line);padding:17px 5px}.faq-list summary{cursor:pointer;color:var(--text);font-weight:700;line-height:1.6}.faq-list details p{padding:12px 0 2px;margin:0;color:var(--body)}.quote-note{border-left:3px solid var(--blue);padding:18px 22px;background:var(--panel);border-radius:0 12px 12px 0;margin:25px 0}.quote-note p:last-child{margin:0}.site-footer{background:#050608;border-top:1px solid var(--line);padding:50px 0 22px}.footer-columns{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:58px}.footer-columns h2{font-size:15px;color:var(--text);margin-bottom:18px}.footer-brand img{max-height:36px;width:auto;object-fit:contain}.footer-brand strong{font-size:24px}.footer-brand p{font-size:14px;margin-top:20px;max-width:310px;color:var(--muted)}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}.footer-links a{font-size:13px;color:var(--muted)}.footer-links a:hover{color:var(--light)}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding-top:22px;margin-top:42px;color:var(--muted);font-size:12px}.back-to-top{position:fixed;right:20px;bottom:25px;opacity:0;visibility:hidden;pointer-events:none;background:var(--blue);color:white;border:0;border-radius:50%;height:44px;width:44px;z-index:25;transition:opacity .2s}.back-to-top.visible{opacity:1;visibility:visible;pointer-events:auto}
.home-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(0,1fr);gap:38px;align-items:center;margin:44px 0 65px}.home-hero h1{font-size:42px}.home-hero .lead{font-size:16px}.home-hero .hero-media{width:100%}.home-hero .hero-media img{max-height:245px}.home-hero .hero-media .image-placeholder{min-height:245px}.section-number{font-size:12px;color:var(--light);letter-spacing:.15em;font-weight:700;margin-bottom:12px}.home-index{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 35px}.home-index>a{display:block;color:inherit;padding:22px 0;border-top:1px solid var(--line)}.home-index h3{color:var(--ice);margin-bottom:7px}.home-index p{margin:0;font-size:14px}.visual-notes{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.visual-notes .media-frame img{max-height:155px}.visual-notes .media-frame figcaption{font-size:12px}.home-service-band{padding:28px 30px;background:var(--panel);border-top:2px solid var(--blue);border-radius:0 0 13px 13px}
@media(max-width:1100px){.desktop-nav{gap:12px}.brand{flex-basis:205px}.desktop-nav a{font-size:13px}}
@media(max-width:979px){.wrap{width:calc(100% - 40px)}.site-header{height:64px}.header-inner{justify-content:space-between;position:relative}.menu-button{display:block}.brand{position:absolute;left:50%;transform:translateX(-50%);align-items:center;flex:unset;width:clamp(105px,30%,205px)}.brand img{max-height:28px}.brand small{display:none}.desktop-nav{display:none}.enter-button{height:40px;min-height:40px;padding:5px 15px;font-size:13px}.quick-inner{gap:24px;overflow-x:auto;scrollbar-width:none;overscroll-behavior-x:contain;white-space:nowrap}.quick-inner::-webkit-scrollbar{display:none}.article-layout{grid-template-columns:1fr;gap:20px}.toc{position:static;order:-1}.footer-columns{gap:32px}}
@media(max-width:767px){.split,.split-uneven{grid-template-columns:1fr;gap:22px}.feature-grid{grid-template-columns:1fr}.three-grid,.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid .wide{grid-column:span 2}.related-links{grid-template-columns:1fr}.home-hero{grid-template-columns:1fr;gap:25px;margin:27px 0 40px}.home-hero .hero-media{grid-row:1}.home-hero .hero-text{grid-row:2}.home-hero h1{font-size:31px}.section-block{margin:35px 0}.page-heading{margin:26px 0}.page-heading h1{font-size:27px}.site-main{padding-bottom:42px}h2{font-size:22px}.footer-columns{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-brand{grid-column:span 2}.footer-bottom{display:block}.footer-bottom span{display:block;margin-bottom:7px}.visual-notes{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-media .image-placeholder{min-height:180px}.home-hero .hero-media img{max-height:145px}.media-frame img{max-height:185px}.device-media{max-width:220px}.thumb img{max-height:155px}.gif-media img{max-height:145px}}
@media(max-width:480px){.wrap{width:calc(100% - 32px)}body{font-size:15px}.brand{width:30%;max-width:130px}.brand img{max-height:28px}.brand strong{font-size:19px}.menu-button{width:40px;flex-basis:40px}.enter-button{padding:4px 12px;font-size:12px}.quick-inner{gap:21px}.home-hero h1{font-size:29px}.home-index{grid-template-columns:1fr}.gallery-grid{gap:12px}.gallery-grid .media-frame{padding:8px}.gallery-grid .media-frame figcaption{font-size:12px}.gallery-grid .media-frame img{max-height:160px}.visual-notes{gap:10px}.visual-notes .media-frame{padding:8px}.text-panel,.editorial-card{padding:17px}.comparison th,.comparison td{padding:9px 7px;font-size:12px}.footer-links{grid-template-columns:1fr}.drawer{width:min(340px,86vw)}}
@media(max-width:355px){.gallery-grid{grid-template-columns:1fr}.gallery-grid .wide{grid-column:auto}.enter-button{padding:4px 9px}.brand{max-width:110px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}