*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}body{margin:0;color:#161616;background:#fff;font-family:Arial,'Microsoft YaHei',sans-serif}a{color:inherit;text-decoration:none}header{height:64px;border-bottom:1px solid #ddd;display:flex;align-items:center;gap:40px;padding:0 32px;background:white;position:sticky;top:0;z-index:5}.brand{font-size:25px;font-weight:900;letter-spacing:-1px}.brand span{display:block;font-size:9px;letter-spacing:3px}nav{display:flex;gap:32px;margin-right:auto;font-size:14px}select{background:transparent;border:1px solid #aaa;padding:12px;color:inherit}header select{border:0}.hero{display:grid;grid-template-columns:1fr 1fr;min-height:600px}.hero>div:first-child{padding:58px 40px}.eyebrow,small{font-size:12px;letter-spacing:1px}.eyebrow{margin:0 0 32px}h1{font-size:clamp(40px,4.5vw,72px);font-weight:400;line-height:1.16;letter-spacing:-2px;max-width:650px;margin:0 0 30px}.lead{font-size:19px;line-height:1.7;max-width:490px;color:#525252}.button{background:#0f62fe;color:#fff;display:inline-flex;justify-content:space-between;gap:50px;border:0;padding:20px 24px;font-size:16px;cursor:pointer;margin-top:24px}.button:hover{background:#0043ce}.textlink{display:block;color:#0f62fe;margin-top:24px}.art{position:relative;overflow:hidden;background:#e8edf3;display:flex;align-items:center;justify-content:center;min-height:480px}.orb{width:330px;height:330px;border-radius:50%;background:repeating-radial-gradient(ellipse at 30% 30%,#a6c8ff 0 2px,#0f62fe 3px 5px,#001d6c 7px 9px);box-shadow:35px 50px 70px #00114155;transform:rotate(-30deg)}.axis{position:absolute;width:550px;height:180px;border:1px solid #4589ff;border-radius:50%;transform:rotate(-35deg)}.art>span{position:absolute;top:30px;left:32px;font-size:18px;line-height:1.5}.art>small{position:absolute;bottom:25px;left:32px}.recommend{display:grid;grid-template-columns:1fr 1fr 1fr 1fr;border-top:1px solid #ccc;border-bottom:1px solid #ccc}.recommend>p,.recommend>a{padding:28px 32px;margin:0;border-right:1px solid #ccc}.recommend a:hover{background:#edf5ff}h3{font-size:23px;font-weight:400;line-height:1.4}.section{padding:72px 40px;border-bottom:1px solid #ccc}.sectionhead{display:grid;grid-template-columns:1fr 1fr;gap:40px;margin-bottom:50px}h2{font-size:clamp(32px,3.4vw,50px);font-weight:400;margin:0;line-height:1.25;letter-spacing:-1px}.section p{line-height:1.8;color:#525252}.cards{display:grid;grid-template-columns:repeat(3,1fr)}article{padding:24px;border:1px solid #ddd;margin-right:-1px}article a{color:#0f62fe}.diagram{height:190px;display:grid;place-items:center;font-size:130px;color:#0f62fe;background:#f4f4f4;margin:-24px -24px 24px}.blue{background:#d0e2ff}.black{background:#161616;color:#a6c8ff}.global{background:#f4f4f4}.global select{margin-left:24px;max-width:100%}.contact{display:grid;grid-template-columns:1fr 1fr;gap:60px}label{display:block;font-size:14px}input,textarea{display:block;width:100%;margin:10px 0 25px;border:0;border-bottom:1px solid #777;background:#f4f4f4;padding:14px;font:inherit}input:focus,textarea:focus,select:focus,a:focus-visible,button:focus-visible{outline:2px solid #0f62fe;outline-offset:3px}.note{font-size:12px}footer{background:#161616;color:white;padding:50px 40px;display:flex;align-items:center;justify-content:space-between;gap:30px}footer strong{font-size:30px}@media(max-width:760px){header{padding:0 16px;gap:10px}nav{gap:12px;font-size:12px}.brand{font-size:18px}header select{width:96px}.hero,.sectionhead,.contact{grid-template-columns:1fr}.hero>div:first-child,.section{padding:40px 24px}.art{min-height:380px}.recommend{grid-template-columns:1fr 1fr}.cards{grid-template-columns:1fr}.global select{margin:16px 0}footer{flex-wrap:wrap}h1{letter-spacing:-1px}}

/* v1.0.0: preserve type and link spacing; scroll navigation on narrow screens. */
header .brand,header #language{flex-shrink:0}header nav{min-width:0;overflow-x:auto;white-space:nowrap;align-items:center;align-self:stretch}header nav a{flex-shrink:0;display:flex;align-items:center}header #language{width:120px}html[dir=rtl] nav{margin-right:0;margin-left:auto}html[dir=rtl] h1,html[dir=rtl] h2{letter-spacing:normal}html[dir=rtl] .global select{margin-left:0;margin-right:24px}

/* Expandable navigation */
header nav .nav-trigger{font:inherit;letter-spacing:inherit;color:inherit;border:0;background:transparent;padding:0;display:flex;align-items:center;gap:10px;flex-shrink:0;cursor:pointer;white-space:nowrap}
.nav-trigger::after{content:"";width:7px;height:7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg);transition:transform .22s}
.nav-trigger[aria-expanded=true]{color:#0f62fe;box-shadow:inset 0 -2px #0f62fe}.nav-trigger[aria-expanded=true]::after{transform:rotate(225deg)}
.menu-backdrop{position:fixed;inset:64px 0 0;background:#16161655;z-index:7}.mega-menu{position:fixed;inset:64px 0 auto;background:#fff;z-index:8;display:grid;grid-template-columns:25% 1fr;min-height:440px;max-height:calc(100dvh - 64px);overflow:auto;border-bottom:1px solid #ccc;box-shadow:0 14px 24px #0001;opacity:0;transform:translateY(-12px)}
.mega-menu.is-open{opacity:1;transform:translateY(0);animation:menu-reveal .24s ease-out}.mega-menu[hidden],.menu-backdrop[hidden]{display:none}
@keyframes menu-reveal{from{opacity:0;transform:translateY(-12px)}to{opacity:1;transform:translateY(0)}}
.mega-sidebar{border-inline-end:1px solid #ddd;padding:20px 0 0 30px;display:flex;flex-direction:column;justify-content:space-between;gap:40px}.mega-categories button{font:inherit;font-size:16px;line-height:1.5;display:block;width:100%;text-align:start;border:0;background:white;padding:12px 20px;cursor:pointer}.mega-categories button:hover,.mega-categories button.is-selected{background:#e8e8e8}.mega-all{display:block;padding:20px;background:#0f62fe;color:white;font-size:16px}.mega-content{padding:28px 50px 48px 40px}.mega-heading{display:block;color:#0f62fe;font-size:32px;margin-bottom:44px;padding-inline-end:30px}.mega-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:38px}.mega-card{font-size:16px;line-height:1.5;padding:8px}.mega-card:hover{background:#f4f4f4;color:#0f62fe}.mega-card p{margin:8px 0;color:#525252}.mega-close{position:absolute;inset-inline-end:12px;top:8px;border:0;background:none;font-size:28px;cursor:pointer}.mega-card,.mega-all{transition:background .18s}.mega-menu a:focus-visible,.mega-menu button:focus-visible{outline:2px solid #0f62fe;outline-offset:-2px}
@media(max-width:760px){.mega-menu{grid-template-columns:1fr;min-height:0}.mega-sidebar{padding:12px 32px 0 12px;border-inline-end:0;border-bottom:1px solid #ddd;gap:12px}.mega-categories{display:flex;overflow-x:auto}.mega-categories button{width:auto;white-space:nowrap}.mega-all{padding:12px 16px}.mega-content{padding:24px}.mega-heading{font-size:25px;margin-bottom:20px}.mega-grid{grid-template-columns:1fr;gap:12px}}
@media(prefers-reduced-motion:reduce){.mega-menu.is-open{animation:none}.nav-trigger::after,.mega-card,.mega-all{transition:none}}