/* Geometry measured from the user-confirmed video frame, not extracted source CSS.
   Reference viewport: 1920 × 736; hero text x≈528, nav 466×44 at y≈12.
   The user's names replace the original two-line headline. */
:root{color-scheme:dark;--home-bg:#080808;--home-ink:#ededed;--home-muted:#7c7c7c;--home-line:rgba(255,255,255,.085);font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--home-bg);color:var(--home-ink)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-width:320px;background:var(--home-bg)}
a{color:inherit}
button{font:inherit;cursor:pointer}
.home-skip{position:fixed;z-index:1500;top:-80px;left:16px;padding:12px 18px;background:#fff;color:#111;text-decoration:none}
.home-skip:focus{top:16px}
.home-hero{position:relative;min-height:max(640px,100svh);overflow:hidden;isolation:isolate}
.home-backdrop,.home-video,.home-shade{position:absolute;inset:0;width:100%;height:100%}
.home-backdrop{z-index:-1;background:var(--home-bg)}
.home-video{display:block;object-fit:cover;pointer-events:none}
.home-shade{background:linear-gradient(90deg,rgba(0,0,0,.65),rgba(0,0,0,.38) 60%,rgba(0,0,0,.5)),linear-gradient(180deg,rgba(0,0,0,.18),transparent 50%,rgba(0,0,0,.5));opacity:0}
.home-backdrop.has-video .home-shade{opacity:1}
/* Frosted glass over the loop film (chosen 2026-10-12): a light frost everywhere plus a heavier frost behind the copy,
   clearing toward the right; fine static grain, no reflections. Sizes follow the hero width (cqw). */
.home-backdrop{container-type:inline-size}
.home-glass{position:absolute;inset:0;display:none;pointer-events:none}
.home-backdrop.has-video .home-glass{display:block}
.home-glass i{position:absolute;inset:0}
.home-glass i:nth-child(1){-webkit-backdrop-filter:blur(.16cqw) contrast(.95);backdrop-filter:blur(.16cqw) contrast(.95)}
.home-glass i:nth-child(2){-webkit-backdrop-filter:blur(.4cqw);backdrop-filter:blur(.4cqw);-webkit-mask-image:linear-gradient(90deg,#000 0,#000 40%,transparent 75%);mask-image:linear-gradient(90deg,#000 0,#000 40%,transparent 75%)}
.home-glass i:nth-child(3){background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .5 0 0 0 0 .5 0 0 0 0 .5 0 0 0 .9 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");background-size:120px;opacity:.15;mix-blend-mode:overlay}
@media(max-aspect-ratio:3/4){.home-glass i:nth-child(2){-webkit-mask-image:linear-gradient(180deg,transparent 8%,#000 26%,#000 82%,rgba(0,0,0,.45) 100%);mask-image:linear-gradient(180deg,transparent 8%,#000 26%,#000 82%,rgba(0,0,0,.45) 100%)}}
.home-copy{position:absolute;top:50%;left:50%;width:min(864px,calc(100% - 80px));transform:translate(-50%,-45%)}
.home-kicker{margin:0 0 26px;display:flex;align-items:center;gap:14px;color:#787878;font:400 9px/14px ui-monospace,"SFMono-Regular",Menlo,monospace;letter-spacing:.2em}
.home-kicker>span{width:17px;height:1px;background:#272727}
#home-title{margin:0;font-weight:400;letter-spacing:-.045em}
.home-name{display:block;color:#eee;font-size:96px;line-height:1;letter-spacing:-.065em;font-weight:520}
.home-name-en{display:block;margin-top:4px;color:#797979;font-family:"Helvetica Neue","Arial",sans-serif;font-size:64px;line-height:1.05;letter-spacing:-.035em;font-weight:200}
.home-intro{max-width:470px;margin:28px 0 42px;color:#858585;font-size:13px;line-height:1.85;letter-spacing:.012em}
.home-intro strong{color:#c5c5c5;font-weight:400}
.home-facts{display:grid;grid-template-columns:1fr 1fr 1.1fr;width:486px;max-width:100%;margin:0;border-top:1px solid var(--home-line);border-bottom:1px solid var(--home-line)}
.home-facts>div{min-height:66px;padding:14px 15px 13px 0}
.home-facts>div+div{padding-left:18px;border-left:1px solid var(--home-line)}
.home-facts dt{margin:0 0 7px;color:#656565;font-size:9px;line-height:1.2}
.home-facts dd{margin:0;color:#c8c8c8;font-size:11px;line-height:1.5;white-space:nowrap}
.home-scroll{position:absolute;left:max(calc(50% - 432px),40px);bottom:29px;display:flex;gap:8px;align-items:center;min-height:32px;text-decoration:none;color:#737373;font:400 8px/1 ui-monospace,"SFMono-Regular",Menlo,monospace;letter-spacing:.24em}
.home-scroll i{height:26px;width:1px;background:linear-gradient(#757575,#292929)}
.home-scroll:hover{color:#ddd}
.home-video-toggle{position:absolute;right:24px;bottom:26px;width:40px;height:40px;border:1px solid #424242;border-radius:50%;background:#08080880;color:#bbb;font-size:11px}
.home-video-toggle[hidden]{display:none}
.home-video-toggle[aria-pressed=true] span{font-size:0}
.home-video-toggle[aria-pressed=true] span::after{content:"▶";font-size:9px;padding-left:2px}
.home-footer{max-width:1024px;min-height:96px;margin:auto;display:flex;align-items:center;gap:24px;font:400 9px/1.5 ui-monospace,"SFMono-Regular",Menlo,monospace;color:#676767}
.home-footer>span{margin-right:auto;letter-spacing:.12em}
.home-footer a{min-height:44px;display:flex;align-items:center;text-decoration:none}
:focus-visible{outline:1px solid #ddd;outline-offset:5px}
@media(max-width:1199px){
 .home-copy{width:calc(100% - 96px)}
 .home-name{font-size:88px}.home-name-en{font-size:58px}
 .home-footer{margin-inline:80px}
 .home-scroll{left:48px}
}
@media(max-width:820px){
 .home-copy{width:calc(100% - 96px)}.home-name{font-size:86px}.home-name-en{font-size:56px}
 .home-footer{margin-inline:40px}.home-scroll{left:48px}
}
@media(max-width:520px){
 .home-hero{min-height:max(680px,100svh)}
 .home-copy{width:calc(100% - 48px);transform:translate(-50%,-44%)}
 .home-kicker{font-size:8px;letter-spacing:.15em;margin-bottom:24px}
 .home-name{font-size:76px}.home-name-en{font-size:42px;letter-spacing:-.045em;line-height:1.2;margin-top:7px}
 .home-intro{font-size:12px;line-height:1.9;margin:24px 0 30px;max-width:330px}
 .home-intro br{display:none}
 .home-facts{grid-template-columns:1fr}
 .home-facts>div,.home-facts>div+div{min-height:39px;display:grid;grid-template-columns:64px 1fr;align-items:center;gap:12px;padding:10px 0;border-left:0}
 .home-facts>div+div{border-top:1px solid var(--home-line)}
 .home-facts dt{margin:0;font-size:10px}.home-facts dd{font-size:11px}
 .home-scroll{left:24px;bottom:20px}
 .home-footer{margin-inline:24px;gap:16px;flex-wrap:wrap;padding:12px 0 24px}
 .home-footer>span{flex-basis:100%;margin-bottom:0}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* F101 retains the B10 bilingual introduction and its one-shot typed signal. */
.home-intro{margin:26px 0 30px;max-width:486px}
.home-intro>p:first-child{margin:0;color:#c3c3bf;font-size:14px;line-height:1.95;max-width:35em}
.cover-english{max-width:48ch;margin:15px 0 0;color:#91918d;font:400 11px/1.75 ui-monospace,"SFMono-Regular",Menlo,monospace}
.cover-typing{min-height:18px;margin:22px 0 0;color:#d0d0cc;font:400 10px/1.8 ui-monospace,"SFMono-Regular",Menlo,monospace}
.typing-caret{display:inline-block;width:.08em;height:1em;margin-left:.18em;background:currentColor;vertical-align:-.1em;animation:typing-blink .9s steps(1,end) infinite}
@keyframes typing-blink{50%{opacity:0}}
@media(max-width:520px){.home-hero{min-height:max(800px,100svh)}.home-copy{transform:translate(-50%,-45%)}.home-intro{margin:22px 0 26px}.home-intro>p:first-child{font-size:13px;line-height:1.9}.cover-english{font-size:10px;line-height:1.75;margin-top:14px}.cover-typing{margin-top:18px;font-size:9px}}
@media(prefers-reduced-motion:reduce){.typing-caret{animation:none}}

/* F105: one visual paragraph for the two Chinese sentences, followed by the full translation. */
.home-belief{margin:0;color:#c3c3bf;font-size:14px;line-height:1.95;max-width:35em}
.cover-english{max-width:100%;font-family:"Helvetica Neue",Arial,sans-serif;letter-spacing:.01em}
@media(max-width:520px){.home-belief{font-size:13px;line-height:1.9}.cover-english{font-size:11px;line-height:1.65}.home-hero{min-height:max(850px,100svh)}}
/* 视觉对齐：720 以下首屏文字与 SCROLL 落在两侧 24px 的外框上 */
@media(max-width:720px){.home-copy{width:calc(100% - 48px)}.home-scroll{left:24px}}