@import url("assets/fonts/split/font-faces.css");
@import url("assets/fonts/noto-serif.css");
@import url("assets/fonts/subset/font-faces.css");

:root{--paper:#faf7f5;--ink:#000;--muted:#666;--line:1px solid var(--ink);--header-height:64px;--index-width:120px;--section-padding:60px 80px;--row-padding:40px 48px;font-family:MiSans,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-height)}
body{margin:0;font-size:16px;line-height:1.7}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit;cursor:pointer;border-radius:0}
a{color:inherit;text-decoration:none}
button{background:none;border:0;padding:0}
button:focus-visible,a:focus-visible{outline:2px solid currentColor;outline-offset:-5px}
[hidden]{display:none!important}
.skip-link{position:fixed;z-index:1000;left:16px;top:-80px;padding:8px 16px;background:var(--ink);color:var(--paper)}
.skip-link:focus{top:8px}
.site-header{height:var(--header-height);padding:0 32px;display:flex;align-items:center;justify-content:space-between;background:var(--paper);position:sticky;top:0;z-index:40}
.wordmark{font-size:24px;font-weight:700;letter-spacing:-.055em;line-height:1}
.navigation{display:flex;align-items:center;gap:40px;font-weight:500;font-size:14px;height:100%;white-space:nowrap}
.navigation>a,.navigation>button{display:flex;align-items:center;height:100%;position:relative}
.navigation>a:after,.navigation>button:after{content:"";position:absolute;left:0;right:0;bottom:16px;height:1px;background:currentColor;transform:scaleX(0);transition:transform .2s}
.navigation>a:hover:after,.navigation>button:hover:after,.navigation>button[aria-expanded=true]:after{transform:scaleX(1)}

.hero{height:600px;perspective:1600px;scroll-margin-top:var(--header-height)}
.hero-flipper{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .8s cubic-bezier(.4,0,.2,1)}
.hero-flipper.is-flipped{transform:rotateX(180deg)}
.hero-face{position:absolute;inset:0;background:var(--paper);border:var(--line);backface-visibility:hidden;-webkit-backface-visibility:hidden;overflow:hidden}
.hero-front{display:flex;align-items:center;justify-content:center;cursor:crosshair}
.pattern-background{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.pattern-background:after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 50% 45% at center,var(--paper) 0%,#faf7f500 100%)}
.cloud-pattern{position:absolute;inset:0;pointer-events:none;background-color:rgb(0 0 0 / 5%);mask-image:url("assets/cloud-pattern.png");mask-mode:alpha;mask-repeat:repeat;mask-size:440px 440px;mask-position:center top}
.hero-title{position:relative;z-index:1;color:#000;letter-spacing:.02em;text-align:center;margin:0;white-space:nowrap;font-size:96px;font-weight:700;line-height:1.7}
.hero-reveal{position:absolute;inset:0;z-index:10;pointer-events:none;background:#000;display:flex;align-items:center;justify-content:center;clip-path:circle(0px at -300px -300px);will-change:clip-path}
.hero-reveal:after{content:"";position:absolute;inset:0;z-index:1;background:radial-gradient(ellipse 45% 40% at center,#000c 0%,#0000 100%)}
.alternate-title{color:#fff;z-index:2}
.inverted-pattern{background-color:rgb(255 255 255 / 12%);mask-size:272px 272px}
.reveal-about,.mobile-about{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);font-size:14px;letter-spacing:.25em;font-weight:700;white-space:nowrap}
.reveal-about{color:rgb(255 255 255 / 85%);z-index:2}
.about-zone{position:absolute;bottom:0;left:0;width:100%;height:80px;z-index:20;cursor:pointer}
.mobile-about{display:none;font-size:13px;color:#0003}
.hero-back{transform:rotateX(180deg);display:flex;flex-direction:column}
.back-bar{height:64px;flex:none;display:flex;align-items:center;justify-content:space-between;padding:0 32px;font-size:14px}
.back-bar>span:first-child{font-size:24px}
.back-bar>span:nth-child(2){letter-spacing:.25em;font-weight:700}
.back-bar>span:last-child{color:var(--muted)}
.about-scroll{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:32px 80px 20px;scrollbar-width:thin}
.about-card{padding:28px 32px;border:1px solid #00000012;border-radius:3px;background:#ffffff73;max-width:1120px;margin:0 auto;font-family:NotoSerifSC,"Songti SC",serif}
.about-card p{margin:0;color:#444;line-height:2}
.about-card p+p{margin-top:16px}
.about-card p:last-child{color:#0006;margin-top:24px}

.content-section{border:var(--line);margin-top:-1px}
.section-heading{display:flex;align-items:center;gap:80px;padding:var(--section-padding);border-bottom:var(--line)}
.section-heading h2{flex:none;font-size:64px;letter-spacing:.02em;line-height:1.5;font-weight:700;margin:0}
.section-heading p{flex:1;font-size:20px;line-height:1.9;color:#333;margin:0;font-family:NotoSerifSC,"Songti SC",serif}
.content-row{width:100%;display:flex;text-align:left;border-bottom:var(--line);background:var(--paper);transition:background .2s,color .2s}
.content-row:last-child{border-bottom:0}
.row-index,.row-arrow{width:var(--index-width);flex-shrink:0;display:flex;justify-content:center;align-items:center}
.row-index{border-right:var(--line);font-size:24px;font-weight:600;color:#999}
.row-arrow{border-left:var(--line);font-size:32px;font-weight:400}
.row-arrow span{transition:transform .2s}
.row-content{padding:var(--row-padding);flex:1;min-width:0;display:flex;flex-direction:column;justify-content:center;font-family:NotoSerifSC,"Songti SC",serif}
.row-content h3{font-size:28px;font-weight:600;line-height:1.3;margin:0 0 8px;overflow-wrap:anywhere}
.row-content p{font-size:16px;line-height:1.5;margin:0;color:var(--muted)}
.content-row:hover{background:#000;color:#fff}
.content-row:hover .row-index,.content-row:hover p{color:#fff}
.content-row:hover .row-arrow span{transform:translateX(8px)}
.contact-note{border-top:var(--line);padding:48px 80px;display:flex;align-items:center;justify-content:space-between}
.contact-note p{font-size:18px;color:var(--muted);margin:0}
.contact-note>span{font-size:20px;font-weight:700}
.site-footer{display:flex;justify-content:space-between;gap:24px;padding:24px 32px;color:#777;font-size:13px}

.detail-dialog{width:min(1100px,calc(100% - 64px));max-height:calc(100dvh - 64px);padding:0;color:var(--ink);background:var(--paper);border:var(--line);overscroll-behavior:contain}
.detail-dialog::backdrop{background:#0006;backdrop-filter:blur(4px)}
.dialog-toolbar{position:sticky;top:0;z-index:1;padding:18px 32px;background:var(--paper);border-bottom:var(--line);display:flex;justify-content:space-between;align-items:center;font-size:14px}
.dialog-toolbar button{display:flex;align-items:center;gap:18px}
.dialog-toolbar button span{font-size:24px;line-height:1}
.detail-content{padding:52px 64px 64px}
.detail-meta{font-size:14px;color:#888;margin:0 0 20px}
.detail-content h2{font-size:52px;line-height:1.2;letter-spacing:.01em;margin:0 0 28px;font-weight:600;overflow-wrap:anywhere}
.detail-summary{font-size:20px;color:#666;margin:0 0 40px;line-height:1.7}
.detail-section{display:flex;gap:48px;padding:28px 0;border-top:1px solid #0002}
.detail-section h3{width:120px;flex-shrink:0;margin:0;font-size:17px;font-weight:600}
.detail-section p{flex:1;margin:0;font-size:16px;color:#444;line-height:1.9}
.detail-links{display:flex;flex-wrap:wrap;gap:16px;margin-top:24px}
.detail-links:empty{display:none}
.detail-links a{background:#000;color:#fff;display:inline-flex;padding:12px 24px;gap:20px}

@media(max-width:1024px){
  :root{--index-width:80px;--section-padding:48px;--row-padding:32px}
  .hero-title{font-size:72px}
  .section-heading{gap:48px}
  .section-heading h2{font-size:48px}
  .section-heading p{font-size:18px}
  .row-index{font-size:20px}
  .row-arrow{font-size:28px}
  .row-content h3{font-size:24px}
  .feature-copy p{font-size:13px}
  .about-scroll{padding:20px 48px 32px}
  .about-card{padding:24px 28px;font-size:15px}
  .contact-note{padding:40px 48px}
}
@media(max-width:768px){
  :root{--header-height:56px;--index-width:60px;--section-padding:40px 24px;--row-padding:24px 20px}
  .site-header{padding:0 20px}
  .wordmark{font-size:22px}
  .navigation{gap:24px;font-size:14px}
  .hero-title{font-size:56px}
  .about-zone{height:100%}
  .mobile-about{display:block}
  .section-heading{flex-direction:column;align-items:center;gap:24px}
  .section-heading h2{font-size:40px}
  .section-heading p{font-size:16px;align-self:stretch}
  .row-index{font-size:16px}
  .row-arrow{font-size:24px}
  .row-content h3{font-size:20px}
  .row-content p{font-size:14px}
  .about-scroll{padding:18px 28px 24px}
  .about-card{padding:20px 22px;font-size:14px}
  .about-card p{line-height:1.9}
  .contact-note{padding:32px 24px}
  .contact-note p{font-size:14px}
  .site-footer{padding:22px 20px;font-size:11px}
  .detail-dialog{width:calc(100% - 32px);max-height:calc(100dvh - 32px)}
  .dialog-toolbar{padding:16px 20px}
  .detail-content{padding:32px 24px 40px}
  .detail-content h2{font-size:32px}
  .detail-summary{font-size:16px;margin-bottom:28px}
  .detail-section{flex-direction:column;gap:12px;padding:22px 0}
  .detail-section h3{width:auto;font-size:16px}
  .detail-section p{font-size:14px}
}
@media(max-width:430px){
  :root{--index-width:50px;--section-padding:32px 20px;--row-padding:20px 16px}
  .site-header{padding:0 14px}
  .wordmark{font-size:20px}
  .navigation{gap:18px;font-size:13px}
  .hero-title{font-size:40px}
  .section-heading{gap:20px}
  .section-heading h2{font-size:32px}
  .section-heading p{font-size:15px}
  .row-index{font-size:14px}
  .row-arrow{font-size:20px}
  .row-content h3{font-size:18px}
  .row-content p{font-size:13px}
  .back-bar{padding:0 20px}
  .about-scroll{padding:14px 16px 20px}
  .about-card{padding:16px;font-size:13px}
  .about-card p{line-height:1.8}
  .contact-note{padding:24px 20px}
  .contact-note p{font-size:13px}
  .contact-note>span{font-size:17px}
}
@media(max-width:360px){.navigation{gap:14px;font-size:12px}.hero-title{font-size:34px}.wordmark{font-size:18px}}
@media(hover:none),(pointer:coarse){.about-zone{height:100%}.mobile-about{display:block}.content-row:hover{background:var(--paper);color:#000}.content-row:hover .row-index{color:#999}.content-row:hover p{color:var(--muted)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}.hero-flipper.is-flipped{transform:rotateX(180deg)}}