*{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:inherit;text-decoration:none}a:hover{color:#8ED8FF}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid #8ED8FF;outline-offset:4px}button{font:inherit;cursor:pointer}img{display:block;max-width:100%;height:auto}h1,h2,h3,p,figure{margin-top:0}h1,h2,h3{color:#F5F7FA;line-height:1.37}h1{font-size:clamp(28px,3.1vw,42px);letter-spacing:-.035em}h2{font-size:clamp(21px,2.2vw,27px)}h3{font-size:19px}p{margin-bottom:17px}small,.muted{color:#9098A3}.shell{width:min(1200px,calc(100% - 48px));margin-inline:auto;min-width:0}.skip-link{position:absolute;left:12px;top:-80px;padding:8px;background:#5C7CFA;color:white;z-index:100}.skip-link:focus{top:10px}.site-header{background:rgba(8,10,13,.96);border-bottom:1px solid rgba(255,255,255,.09)}.brand-row{height:76px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;gap:10px;width:220px;min-width:0;flex:none}.brand-en{font-size:9px;letter-spacing:.04em;color:#9098A3;line-height:1.3}.media-frame{margin:0;min-width:0;max-width:100%;background:#0D1015;border:1px solid rgba(255,255,255,.09);border-radius:13px;overflow:hidden;display:flex;align-items:center;justify-content:center;position:relative}.media-frame img{width:100%;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-placeholder{width:100%;min-height:145px;display:flex;align-items:center;justify-content:center;color:#6E7886;font-size:13px;background:linear-gradient(140deg,#111824,#0D1015)}.brand-image,.drawer-logo,.footer-logo{border:0;background:none;border-radius:0;flex:none}.brand-image{width:105px;height:36px}.brand-image img{max-height:36px;width:auto}.brand-image .media-placeholder,.drawer-logo .media-placeholder,.footer-logo .media-placeholder{min-height:30px;font-size:10px}.primary-nav{display:flex;gap:clamp(12px,1.6vw,24px);align-items:center;justify-content:center;flex:1;white-space:nowrap}.primary-nav a{font-size:14px;line-height:76px;border-bottom:2px solid transparent}.primary-nav a.is-current{color:#6EA8FF;border-color:#6EA8FF}.entry-button{margin-left:auto;flex:none;background:#5C7CFA;color:#fff!important;border-radius:999px;padding:0 19px;display:inline-flex;align-items:center;justify-content:center;height:42px;font-size:14px;font-weight:700}.entry-button:hover{background:#7390FF}.quick-band{background:#10141A;border-bottom:1px solid rgba(255,255,255,.09)}.quick-desktop{height:44px;display:flex;align-items:center;gap:29px}.quick-desktop a{font-size:13px}.quick-desktop [aria-current]{color:#6EA8FF}.quick-mobile{display:none}.menu-toggle{display:none}.drawer-overlay{position:fixed;inset:0;z-index:50;background:rgba(0,0,0,.65);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .22s,visibility .22s}.site-drawer{position:fixed;inset:0 auto 0 0;z-index:51;width:min(390px,86vw);max-width:100%;overflow-y:auto;background:#0D1015;padding:22px;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s}.drawer-open{overflow:hidden}.drawer-open .site-drawer{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}.drawer-logo{width:110px;height:40px}.drawer-logo img{max-height:36px;width:auto}.drawer-close{border:0;color:white;background:transparent;font-size:29px}.drawer-group{border-top:1px solid rgba(255,255,255,.09);padding:14px 0}.drawer-group h2{font-size:13px;color:#8ED8FF;letter-spacing:.06em;margin:0 0 9px}.drawer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 14px}.drawer-links a{font-size:14px;padding:5px 0}.main-content{padding-block:40px 70px}.breadcrumb{font-size:13px;color:#9098A3;display:flex;gap:10px;flex-wrap:wrap;margin:-12px 0 28px}.page-lead{max-width:840px;margin:0 0 34px}.eyebrow{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:#8ED8FF;font-weight:700;margin-bottom:12px}.lede{font-size:18px;color:#CFD8E4;line-height:1.75}.article-shell{display:grid;grid-template-columns:minmax(0,790px) minmax(190px,1fr);gap:55px;align-items:start}.article-shell>*,.split>*,.feature-split>*{min-width:0}.article-body>section{margin:0 0 42px}.article-body>section h2{border-left:3px solid #5C7CFA;padding-left:15px;margin-bottom:18px}.article-body p{line-height:1.85}.section-number{color:#6EA8FF;font-size:12px;font-weight:700;letter-spacing:.14em}.side-index{position:sticky;top:20px;border-top:1px solid rgba(255,255,255,.16);padding:18px 0}.side-index h2{font-size:15px}.side-index a{display:block;padding:7px 0;color:#9FAAB9;font-size:14px}.side-index a:hover{color:#8ED8FF}.related{margin-top:46px;padding:26px 0 6px;border-top:1px solid rgba(255,255,255,.16)}.related h2{font-size:22px}.related-grid{display:flex;gap:12px;flex-wrap:wrap}.related-grid a{border:1px solid rgba(255,255,255,.12);padding:9px 17px;border-radius:100px;color:#DAE3EE;font-size:14px}.related-grid a:hover{border-color:#5C7CFA;color:#8ED8FF}.text-link{color:#8ED8FF;display:inline-block;font-weight:600;font-size:14px;margin:7px 0}.issue-line{color:#9098A3;font-size:13px;margin-bottom:22px}.plain-panel{background:#12161C;border:1px solid rgba(255,255,255,.09);border-radius:13px;padding:22px;margin:18px 0}.plain-panel p:last-child{margin-bottom:0}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}.feature-split{display:grid;grid-template-columns:.9fr 1.1fr;gap:35px;align-items:center}.full-width{width:100%}.image-hero{min-height:260px;max-height:310px}.image-hero img{max-height:308px;width:auto}.image-hero .media-placeholder{min-height:260px}.article-image{margin:20px 0;min-height:180px;max-height:245px}.article-image img{width:auto;max-height:240px}.image-device{max-width:270px;max-height:340px;margin:auto}.image-device img{width:auto;max-height:338px}.image-device .media-placeholder{min-height:250px}.image-gif{max-height:175px}.image-gif img{max-height:170px;width:auto}.image-tile{min-height:140px;max-height:190px}.image-tile img{max-height:185px;width:auto}.image-tile .media-placeholder{min-height:140px}.image-banner{max-height:245px}.image-banner img{max-height:240px;width:auto}.image-banner .media-placeholder{min-height:170px}.image-caption{font-size:13px;color:#9098A3;margin:7px 0 0}.number-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.number-card{border-top:1px solid rgba(255,255,255,.16);padding:19px 10px 14px 0}.number-card h3{margin-bottom:7px}.number-card p{font-size:15px}.section-divider{border-top:1px solid rgba(255,255,255,.12);margin-block:52px 28px}.section-heading{display:flex;align-items:baseline;gap:20px;margin-bottom:23px}.section-heading span{font-size:12px;color:#6EA8FF;letter-spacing:.1em}.section-heading h2{margin:0}.home-hero{margin:2px 0 54px;grid-template-columns:1.06fr .94fr}.home-hero h1{font-size:clamp(29px,3.2vw,42px)}.home-hero p{max-width:560px}.home-hero .image-hero{align-self:stretch}.hero-actions{display:flex;gap:22px;flex-wrap:wrap}.home-block{margin:52px 0}.editorial-columns{display:grid;grid-template-columns:1.35fr .65fr;gap:45px}.note-list{counter-reset:item}.note-list>div{border-top:1px solid rgba(255,255,255,.12);padding:12px 0}.note-list strong{display:block;color:#8ED8FF;font-size:13px}.note-list a{color:#F5F7FA}.visual-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.visual-grid>article{min-width:0}.visual-grid h3{font-size:17px;margin:13px 0 7px}.visual-grid p{font-size:14px;color:#AAB4C1}.visual-grid figure{width:100%}.image-study-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:17px}.image-study-grid h3{font-size:16px;margin:12px 0}.image-study-grid p{font-size:14px}.index-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px}.index-list>article{border-top:1px solid rgba(255,255,255,.12);padding:17px 0}.index-list small{color:#6EA8FF}.index-list h3{margin:4px 0 9px}.index-list p{font-size:14px}.full-article{max-width:820px;margin:auto}.comparison{width:100%;border-collapse:collapse;font-size:14px;margin:22px 0}.comparison th,.comparison td{text-align:left;padding:13px;vertical-align:top;border-bottom:1px solid rgba(255,255,255,.14)}.comparison th{color:#F5F7FA;background:#171C23}.step-list{display:grid;gap:18px}.step-list>section{border-left:1px solid #5C7CFA;padding:4px 0 6px 22px}.step-list h2{font-size:21px}.faq-list details{border-bottom:1px solid rgba(255,255,255,.13);padding:15px 0}.faq-list summary{cursor:pointer;font-weight:700;color:#F5F7FA}.faq-list details p{padding:12px 14px 4px;margin:0}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.gallery-grid>article{min-width:0}.gallery-grid article:nth-child(3n){grid-column:1/-1;max-width:800px}.gallery-grid p{font-size:14px;margin-top:10px}.gallery-grid .media-frame{min-height:185px;max-height:270px}.gallery-grid img{max-height:265px;width:auto}.service-strip{border-top:1px solid rgba(255,255,255,.16);padding-top:22px}.site-footer{background:#050608;border-top:1px solid rgba(255,255,255,.1);padding:42px 0 16px}.footer-layout{display:grid;grid-template-columns:1fr 1.4fr .7fr;gap:35px}.footer-layout nav h2{font-size:16px}.footer-layout p,.footer-links a{font-size:13px;color:#9098A3}.footer-logo{width:125px;height:45px;margin-bottom:12px}.footer-logo img{width:auto;max-height:42px}.footer-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px 8px}.footer-layout nav:last-child .footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-bottom{display:flex;gap:25px;border-top:1px solid rgba(255,255,255,.09);margin-top:26px;padding-top:15px;font-size:12px;color:#9098A3}.footer-bottom p{margin:0}.back-top{position:fixed;right:22px;bottom:22px;border:1px solid rgba(255,255,255,.2);border-radius:50%;width:42px;height:42px;background:#171C23;color:white;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s}.back-top.is-visible{opacity:1;visibility:visible;pointer-events:auto}@media(max-width:1100px){.brand{width:170px}.brand-en{display:none}.primary-nav{gap:12px}.primary-nav a{font-size:13px}}@media(max-width:979px){.shell{width:calc(100% - 40px)}.brand-row{height:64px;justify-content:space-between}.primary-nav{display:none}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;width:40px;height:40px;border:1px solid rgba(255,255,255,.14);border-radius:10px;background:transparent;color:white;flex:none}.menu-toggle span{display:block;width:19px;height:2px;background:#F5F7FA}.brand{position:absolute;left:50%;transform:translateX(-50%);width:auto;max-width:120px;justify-content:center}.brand-image{height:28px;width:100px}.brand-image img{max-height:28px}.entry-button{height:40px;font-size:12px;padding-inline:13px}.quick-desktop{display:none}.quick-mobile{display:flex;align-items:center;gap:26px;height:44px;white-space:nowrap;overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-width:none;padding:0 20px}.quick-mobile::-webkit-scrollbar{display:none}.quick-mobile a{font-size:13px;flex:none}.article-shell{grid-template-columns:minmax(0,1fr)}.side-index{position:static;order:-1;display:none}.footer-layout{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}}@media(max-width:767px){body{font-size:15px}.main-content{padding-block:25px 52px}.split,.feature-split,.editorial-columns{grid-template-columns:1fr;gap:24px}.home-hero .image-hero{order:-1}.home-hero{margin-bottom:36px}.image-hero{min-height:170px;max-height:205px}.image-hero img{max-height:200px}.image-hero .media-placeholder{min-height:170px}.section-divider{margin-block:36px 20px}.home-block{margin:37px 0}.number-grid,.index-list{grid-template-columns:1fr}.visual-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.image-study-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-image{min-height:145px;max-height:185px}.article-image img{max-height:180px}.image-device{max-width:220px}.image-banner{max-height:145px}.image-banner img{max-height:140px}.image-gif{max-height:145px}.image-gif img{max-height:140px}.image-tile{min-height:120px;max-height:155px}.image-tile img{max-height:150px}.footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-layout{gap:25px}.lede{font-size:16px}.gallery-grid{gap:15px}}@media(max-width:430px){.shell{width:calc(100% - 32px)}.brand-row{height:62px}.brand-image{width:86px}.brand-image img{max-height:28px}.entry-button{height:38px;padding:0 12px}.visual-grid,.image-study-grid{gap:11px}.visual-grid p,.image-study-grid p{font-size:13px}.gallery-grid{grid-template-columns:1fr}.gallery-grid article:nth-child(3n){grid-column:auto}.footer-layout{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-bottom{display:block}.footer-layout nav .footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}.site-drawer{padding:16px}.section-heading{gap:10px}.section-heading h2{font-size:20px}}@media(max-width:350px){.visual-grid,.image-study-grid{grid-template-columns:1fr}.entry-button{padding:0 9px;font-size:11px}.brand-image{width:78px}.quick-mobile{gap:20px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
