:root{--ink:#17202a;--muted:#4b5563;--line:#dce1e6;--paper:#fff;--orange:#d94b24;--green:#718a70;--sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:98px}body{margin:0;color:var(--ink);background:var(--paper);font:15px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:6px}svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-defs{position:absolute;width:0;height:0;overflow:hidden}.wrap,.header-inner{width:min(1184px,calc(100% - 96px));margin:auto}h1,h2,h3,p{margin:0}.site-header{height:100px;border-bottom:1px solid 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@media(max-width:1050px){.wrap,.header-inner{width:calc(100% - 64px)}.hero{grid-template-columns:1fr 1fr;gap:8px;min-height:610px}.hero-art{transform:scale(.88);transform-origin:right center;width:112%;margin-left:-12%}.hero h1{font-size:46px}.band-inner>div{gap:23px}.guide-layout{gap:45px}.download-card{padding:22px}.recommended{font-size:8px}.closing{padding:30px}.closing-mark{display:none}}
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@media(max-width:380px){.hero-art{transform:scale(.86);width:113%;margin-left:-6.5%;height:390px}.hero h1{font-size:43px}.download-grid{grid-template-columns:1fr}.download-card{min-height:280px}.band-inner>div>span{font-size:8px;gap:3px}.band-inner>div{gap:5px}.recommended{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* v1.1: white surfaces, stronger contrast and readable text at every width. */
body{font-size:16px;line-height:1.7}.site-header{background:#fff}.brand-en{color:#475569;font-size:9px}nav{font-size:14px;color:#374151}.nav-cta{font-size:14px;font-weight:600}.eyebrow{font-size:12px;color:#374151}.hero-desc{font-size:16px;color:#4b5563}.button{font-size:15px;padding:15px 25px;font-weight:600}.hero-caption{font-size:12px;color:#4b5563}.hero-caption span{color:#64748b}.band-title{font-size:14px;color:#475569}.band-inner>div>span{font-size:14px;color:#374151}.band-inner svg{stroke-width:1.8}.platform-band{background:#fafbfc}.section-kicker{font-size:12px;color:#475569}.section-heading h2,.guide-layout h2{font-size:34px;color:#17202a}.section-heading>p{font-size:14px;color:#4b5563}.download-grid{gap:20px}.download-card{background:#fff;border-color:#d5dce3;padding:27px;min-height:340px;box-shadow:0 2px 5px #17202a03}.download-card:hover{border-color:#d94b24;transform:translateY(-2px)}.download-card.is-recommended{background:#fff;border-color:#d94b24;box-shadow:inset 0 0 0 1px #d94b24}.recommended{background:#fff0e9;color:#9a3412;border-color:#f4c2ad;font-size:11px;font-weight:600;padding:4px 9px}.platform-icon{color:#17202a}.platform-icon svg{stroke-width:1.8;width:32px;height:32px}.download-card h3{font-size:26px;font-weight:650;color:#111827}.platform-label{font-size:14px;color:#374151;margin-top:7px}.platform-desc{font-size:14px;color:#4b5563;max-width:none;margin-top:18px;line-height:1.85}.platform-meta{font-size:12px;color:#4b5563;letter-spacing:0;line-height:1.6}.card-actions{margin-top:15px}.download-button{min-height:49px;font-size:14px;font-weight:600;background:#17202a;border-color:#17202a;color:#fff;padding:12px 15px}.download-button:hover{background:#303d4c}.download-button.pending{background:#f1f3f5;color:#4b5563;border-color:#d5dce3;opacity:1;font-weight:500}.download-note{font-size:12px;color:#4b5563;gap:13px}.download-note svg{width:16px;height:16px}.device-hint{font-size:13px;color:#9a3412}.device-hint svg{color:#b13d1b;width:17px;height:17px}.all-releases{color:#9a3412}.guide-section{background:#f6f7f9;border-color:#dce1e6}.guide-intro{font-size:14px;color:#4b5563}.guide-stamp{font-size:12px;color:#475569}.guide-stamp span{border-color:#8190a2;color:#475569}.step-no{font-size:13px;color:#475569}.steps{border-color:#dce1e6}.steps li{border-color:#dce1e6}.steps h3{font-size:17px;color:#17202a;font-weight:600}.steps p{font-size:14px;color:#4b5563}.faq-note{font-size:13px;color:#4b5563}summary{font-size:15px;color:#17202a;font-weight:550}summary>span{color:#475569}details>p{font-size:14px;color:#4b5563}.closing{background:#fff0e7;border:1px solid #f0d3c0}.closing .eyebrow{font-size:12px;color:#843b20}.closing h2{color:#17202a}.closing-mark{color:#843b20;border-color:#bc7959}footer p,.back-top{font-size:12px;color:#4b5563}.footer-brand strong{color:#17202a}
@media(max-width:1050px){.band-inner>div{gap:20px}.band-inner>div>span{font-size:12px}.download-card{padding:23px}.recommended{font-size:10px}}
@media(max-width:760px){.hero h1{font-size:48px}.hero-desc{font-size:16px;line-height:1.9}.hero-caption{font-size:11px}.hero-caption span{padding:0 5px}nav{font-size:13px}.brand strong{font-size:18px}.eyebrow{font-size:12px}.section-heading h2,.guide-layout h2{font-size:29px}.section-heading>p,.guide-intro{font-size:14px}.download-grid{gap:14px}.download-card{padding:22px;min-height:350px}.download-card h3{font-size:25px}.platform-label,.platform-desc{font-size:14px}.platform-meta{font-size:12px}.download-button{font-size:14px;min-height:48px}.recommended{font-size:10px}.download-note{font-size:12px;line-height:1.8}.band-title{font-size:13px}.band-inner>div{flex-wrap:wrap;justify-content:flex-start;column-gap:24px;row-gap:13px}.band-inner>div>span{font-size:12px}.band-inner svg{width:20px;height:20px}.steps h3{font-size:17px}.steps p{font-size:14px}summary{font-size:15px;line-height:1.8}details>p{font-size:14px}.closing h2{font-size:26px}.closing .button{font-size:14px}.closing .eyebrow{font-size:12px}footer p,.back-top{font-size:12px}.device-hint{font-size:13px}}
@media(max-width:540px){.download-grid{grid-template-columns:1fr}.download-card{min-height:0;padding:25px}.card-top{margin-bottom:20px;flex-wrap:nowrap}.download-card h3{font-size:27px}.platform-desc{margin-top:14px}.platform-meta{margin-top:23px}.recommended{font-size:11px}.download-button{font-size:15px;min-height:51px}.brand strong{font-size:17px}nav{gap:17px}.hero h1{font-size:46px;letter-spacing:-2px}}
/* Keep supporting copy comfortably readable, especially on phones. */
.platform-label,.platform-desc{font-size:15px}.platform-meta{font-size:13px}.steps p,details>p{font-size:15px}.download-button{font-size:15px}
@media(max-width:760px){.platform-label,.platform-desc{font-size:16px}.platform-meta{font-size:13px}.steps p,details>p{font-size:16px}.download-button{font-size:16px}.section-heading>p{font-size:15px}}