/* ============================================================
   YUNAPP主页 · 共享外壳样式 /assets/site.css
   高原蓝 + 日出橙 · 非对称编辑部框架 · 1px 极细边界
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,ul,ol,li,figure,blockquote,dl,dt,dd{margin:0}
ul,ol{padding:0;list-style:none}
img,svg,video{max-width:100%;display:block;height:auto}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line);margin:0}
:focus-visible{outline:2px solid var(--sun);outline-offset:3px;border-radius:3px}

/* ---------- 2. Tokens ---------- */
:root{
  color-scheme:light;
  --night:#071A2B;
  --night-soft:#0B2438;
  --sky:#1264C0;
  --sky-deep:#0C4C95;
  --lake:#0E8B8B;
  --sun:#FF7A1A;
  --sun-ink:#C2530F;
  --flag-red:#E04B2A;
  --flag-yellow:#F5C044;
  --flag-green:#2FA36B;
  --cloud:#F3F7FB;
  --mist:#E3F1F1;
  --line:#D7E2EC;
  --line-strong:#B9C9D8;
  --ink:#0F1B26;
  --ink-soft:#5A6B7B;
  --ink-mute:#8496A6;
  --paper:#FFFFFF;
  --shell:1240px;
  --gutter:clamp(16px,4vw,40px);
  --header-h:72px;
  --r:6px;
  --shadow:0 4px 16px rgba(7,26,43,.06);
  --shadow-lift:0 12px 32px rgba(7,26,43,.10);
  --ease:cubic-bezier(.2,.7,.2,1);
  --slant:6deg;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"IBM Plex Mono","SFMono-Regular",ui-monospace,Menlo,Consolas,"Courier New",monospace;
}

/* ---------- 3. Base ---------- */
body{
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.8;
  color:var(--ink);
  background:var(--cloud);
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
::selection{background:#CFEBEA;color:var(--ink)}

/* ---------- 4. Layout utilities ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.shell-wide{max-width:1440px}
.shell-narrow{max-width:820px}
.page-top{padding-top:calc(var(--header-h) + clamp(28px,5vw,64px))}
.section{padding-block:clamp(48px,8vw,110px)}
.section--tight{padding-block:clamp(32px,5vw,64px)}
.section--mist{background:var(--mist)}
.section--paper{background:var(--paper)}
.section--night{background:var(--night);color:#DCE8F2}
.slant-bottom{clip-path:polygon(0 0,100% 0,100% calc(100% - 5vw),0 100%)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ---------- 5. Typography ---------- */
.display{font-weight:900;letter-spacing:.02em;line-height:1.05;font-size:clamp(2.4rem,5.6vw,4.8rem)}
.h1{font-weight:900;letter-spacing:.02em;line-height:1.1;font-size:clamp(2rem,4.4vw,3.4rem)}
.h2{font-weight:800;letter-spacing:.01em;line-height:1.2;font-size:clamp(1.6rem,3vw,2.4rem)}
.h3{font-weight:800;line-height:1.35;font-size:clamp(1.15rem,1.6vw,1.4rem)}
.lede{font-size:clamp(1.05rem,1.5vw,1.25rem);line-height:1.75;color:var(--ink-soft);max-width:52ch}
.mono{font-family:var(--font-mono);letter-spacing:.04em}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:12px;letter-spacing:.16em;color:var(--lake);text-transform:uppercase}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--lake);flex:0 0 auto}
.prose{max-width:68ch;font-size:17px;line-height:1.8;color:var(--ink)}
.prose p+p{margin-top:1em}
.prose ul,.prose ol{list-style:disc;padding-left:1.25em;margin-top:1em}
.prose li+li{margin-top:.4em}
.prose h2{font-size:clamp(1.4rem,2.4vw,1.9rem);font-weight:800;line-height:1.3;margin-top:2.2em}
.prose h3{font-size:1.15rem;font-weight:800;line-height:1.4;margin-top:1.8em}
.prose blockquote{border-left:2px solid var(--lake);background:var(--mist);padding:14px 18px;border-radius:0 var(--r) var(--r) 0;margin-top:1.4em;color:#2C4653}
.hl{background:#CFEBEA;padding:.08em .3em;border-radius:3px;font-weight:600;color:var(--ink)}
.hl-underline{color:var(--sky);border-bottom:2px solid var(--sky);padding-bottom:1px;font-weight:600}
.link-more{display:inline-flex;align-items:center;gap:8px;font-weight:700;color:var(--sky);border-bottom:2px solid rgba(18,100,192,.25);padding-bottom:2px;transition:border-color .2s var(--ease),color .2s var(--ease)}
.link-more::after{content:"→";transition:transform .2s var(--ease)}
.link-more:hover{border-bottom-color:var(--sky);color:var(--sky-deep)}
.link-more:hover::after{transform:translateX(4px)}

/* ---------- 6. Buttons & chips ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14px;letter-spacing:.01em;line-height:1.2;padding:10px 18px;border-radius:var(--r);border:1px solid transparent;white-space:nowrap;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease)}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--sky);color:#fff}
.btn-primary:hover{background:var(--sky-deep)}
.btn-sun{background:var(--sun);color:#1A1206}
.btn-sun:hover{background:#F0690A}
.btn-outline{border-color:var(--sun);color:var(--sun-ink);background:transparent}
.btn-outline:hover{background:rgba(255,122,26,.08)}
.btn-quiet{border-color:currentColor;color:inherit;background:transparent;opacity:.85}
.btn-quiet:hover{opacity:1}
.header-cta{font-size:14px;padding:10px 16px}
.header-cta-secondary{font-size:13.5px;padding:9px 14px;font-weight:600}
.chip{display:inline-flex;align-items:center;gap:6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;padding:3px 9px;border-radius:999px;border:1px solid var(--line);background:var(--cloud);color:var(--ink-soft);white-space:nowrap}
.chip--normal{color:#17593A;border-color:rgba(47,163,107,.42);background:rgba(47,163,107,.10)}
.chip--moving{color:#8A4310;border-color:rgba(245,192,68,.6);background:rgba(245,192,68,.20)}
.chip--moved{color:#8E2C16;border-color:rgba(224,75,42,.42);background:rgba(224,75,42,.10)}
.chip--info{color:#0C4C95;border-color:rgba(18,100,192,.35);background:rgba(18,100,192,.08)}

/* ---------- 7. Header ---------- */
.skip-link{position:fixed;top:-120px;left:16px;z-index:200;background:var(--night);color:#EAF2FA;padding:12px 18px;border-radius:var(--r);font-weight:700;font-size:14px;transition:top .2s var(--ease)}
.skip-link:focus{top:12px}

.site-header{
  position:fixed;inset:0 0 auto 0;z-index:80;
  --hd-fg:#EAF2FA;
  --hd-fg-soft:rgba(234,242,250,.66);
  --hd-line:rgba(215,226,236,.22);
  color:var(--hd-fg);
  background:linear-gradient(180deg,rgba(7,26,43,.72),rgba(7,26,43,0));
  border-bottom:1px solid transparent;
  transition:background-color .16s linear,color .16s linear,border-color .16s linear,box-shadow .16s linear;
}
.site-header[data-scrolled="true"]{
  --hd-fg:var(--ink);
  --hd-fg-soft:var(--ink-soft);
  --hd-line:var(--line);
  background:rgba(243,247,251,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  border-bottom-color:var(--line);
  box-shadow:0 4px 16px rgba(7,26,43,.06);
}
.header-shell{
  position:relative;z-index:2;
  width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter);
  min-height:var(--header-h);
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;
  gap:clamp(12px,2vw,32px);
}
.brand{display:inline-flex;align-items:center;gap:10px;color:inherit}
.brand-mark{position:relative;flex:0 0 auto;width:26px;height:26px;border:1px solid currentColor;border-radius:5px;display:grid;place-items:center;opacity:.95}
.brand-mark::before{content:"";width:13px;height:11px;background:linear-gradient(160deg,var(--lake),var(--sky));clip-path:polygon(0 100%,52% 8%,100% 100%)}
.brand-words{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-weight:800;font-size:16px;letter-spacing:.02em}
.brand-tag{font-size:11px;letter-spacing:.14em;color:var(--hd-fg-soft);font-family:var(--font-mono)}

.primary-nav{justify-self:center}
.nav-legend{display:none}
.nav-list{display:flex;align-items:center;gap:clamp(4px,1.4vw,22px)}
.nav-item{position:relative}
.nav-link{position:relative;display:inline-block;padding:8px 2px;font-size:15px;color:var(--hd-fg);opacity:.84;white-space:nowrap;transition:opacity .2s var(--ease)}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--sun);transform:scaleX(0);transform-origin:left;transition:transform .24s var(--ease)}
.nav-link:hover{opacity:1}
.nav-link:hover::after,.nav-link:focus-visible::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{opacity:1;font-weight:700}
.nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--lake)}

.header-actions{justify-self:end;display:flex;align-items:center;gap:10px}
.status-chip{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;padding:5px 10px;border:1px solid var(--hd-line);border-radius:999px;color:var(--hd-fg-soft);white-space:nowrap}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--flag-green);box-shadow:0 0 0 3px rgba(47,163,107,.18);animation:pulse-dot 8s ease-in-out infinite}
.status-text{display:inline-block}
@keyframes pulse-dot{
  0%,100%{box-shadow:0 0 0 3px rgba(47,163,107,.18)}
  50%{box-shadow:0 0 0 7px rgba(47,163,107,.05)}
}

.nav-toggle{display:none;align-items:center;gap:8px;padding:8px 11px;border-radius:var(--r);border:1px solid var(--hd-line);color:var(--hd-fg);font-size:13px;font-weight:700}
.nav-toggle-label{letter-spacing:.08em}
.nav-toggle-glyph{position:relative;display:block;width:18px;height:12px}
.nav-toggle-glyph::before,.nav-toggle-glyph::after{content:"";position:absolute;left:0;right:0;height:1.5px;background:currentColor;transition:transform .24s var(--ease)}
.nav-toggle-glyph::before{top:2px}
.nav-toggle-glyph::after{bottom:2px}
.site-header[data-open] .nav-toggle-glyph::before{transform:translateY(4.5px) rotate(45deg)}
.site-header[data-open] .nav-toggle-glyph::after{transform:translateY(-4.5px) rotate(-45deg)}

.header-scale{display:block;height:5px;background-image:repeating-linear-gradient(90deg,var(--hd-line) 0 1px,transparent 1px 28px);opacity:.55}
.scroll-progress{position:absolute;left:0;bottom:0;height:2px;width:0;z-index:3;background:linear-gradient(90deg,var(--lake),var(--sky) 55%,var(--sun))}

/* ---------- 8. Mobile dock ---------- */
.mobile-dock{display:none}
.dock-action{display:flex;align-items:center;justify-content:center;padding:12px 10px;border-radius:8px;font-weight:700;font-size:15px;color:#EAF2FA;border:1px solid rgba(215,226,236,.22)}
.dock-action-primary{background:var(--sun);color:#1A1206;border-color:var(--sun)}

/* ---------- 9. Footer ---------- */
.site-footer{position:relative;overflow:hidden;background:var(--night);color:#C9D8E6;padding-top:clamp(48px,7vw,88px)}
.site-footer::before{
  content:"";position:absolute;inset:-24% -10% auto -10%;height:380px;pointer-events:none;
  background:
    radial-gradient(58% 100% at 18% 0%,rgba(14,139,139,.34),transparent 70%),
    radial-gradient(52% 100% at 82% 0%,rgba(18,100,192,.34),transparent 70%);
}
.footer-shell{position:relative;z-index:1;width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.footer-top{display:grid;grid-template-columns:1.5fr .9fr 1.1fr 1.4fr .9fr;gap:clamp(20px,3vw,42px)}
.footer-brand{min-width:0}
.brand--footer{color:#EAF2FA}
.brand--footer .brand-tag{color:#8FA6BA}
.footer-line{margin-top:16px;font-size:14.5px;line-height:1.7;color:#C9D8E6;max-width:26ch}
.footer-flags{display:flex;gap:6px;margin-top:18px}
.footer-flags li{width:22px;height:3px;border-radius:2px}
.footer-flags li:nth-child(1){background:var(--sky)}
.footer-flags li:nth-child(2){background:#EAF2FA}
.footer-flags li:nth-child(3){background:var(--flag-red)}
.footer-flags li:nth-child(4){background:var(--flag-green)}
.footer-flags li:nth-child(5){background:var(--flag-yellow)}
.footer-col{min-width:0}
.footer-col-title{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:12.5px;font-weight:500;letter-spacing:.14em;color:#EAF2FA;margin-bottom:14px}
.footer-col-title::before{content:"";flex:0 0 auto;width:16px;height:1px;background:var(--sun)}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-link{display:inline-block;padding:3px 0;font-size:14px;color:#A9BFD2;transition:color .2s var(--ease)}
.footer-link:hover,.footer-link:focus-visible{color:#fff;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--sun)}
.footer-link--mono{font-family:var(--font-mono);font-size:12.5px;letter-spacing:.02em;word-break:break-all}
.footer-list--contact{gap:6px}
.footer-contact-line{display:flex;gap:10px;font-size:13.5px;line-height:1.6;color:#A9BFD2}
.footer-contact-label{flex:0 0 32px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:#6E869B;padding-top:2px}
.footer-value{color:#C9D8E6}
.footer-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:#7E93A6;max-width:34ch}
.footer-legal{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-top:clamp(32px,5vw,56px);padding:20px 0 30px;border-top:1px solid rgba(215,226,236,.14);font-size:12.5px;color:#7E93A6}
.footer-legal-line{font-family:var(--font-mono);letter-spacing:.04em}
.footer-copy{color:#7E93A6}

/* ---------- 10. Shared content components ---------- */
.section-head{display:grid;grid-template-columns:auto 1fr;gap:clamp(14px,2.4vw,28px);align-items:start;margin-bottom:clamp(20px,3vw,36px)}
.rail-note{writing-mode:vertical-rl;text-orientation:mixed;font-size:13px;font-weight:600;letter-spacing:.2em;color:var(--ink-soft);padding-block:4px}
.section-title{font-weight:800;line-height:1.2;font-size:clamp(1.6rem,3vw,2.4rem);letter-spacing:.01em}
.section-desc{margin-top:10px;color:var(--ink-soft);max-width:56ch;font-size:16px}

.stage-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2.2vw,28px)}
.span-2{grid-column:span 2}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-5{grid-column:span 5}
.span-6{grid-column:span 6}
.span-7{grid-column:span 7}
.span-8{grid-column:span 8}
.span-9{grid-column:span 9}
.span-10{grid-column:span 10}
.span-11{grid-column:span 11}
.span-12{grid-column:span 12}

.tick-frame{position:relative;border:1px solid var(--line);border-radius:var(--r);background:var(--paper)}
.tick-frame::before,.tick-frame::after{content:"";position:absolute;width:14px;height:14px;border:1px solid var(--lake);pointer-events:none}
.tick-frame::before{top:-1px;left:-1px;border-right:0;border-bottom:0;border-radius:var(--r) 0 0 0}
.tick-frame::after{bottom:-1px;right:-1px;border-left:0;border-top:0;border-radius:0 0 var(--r) 0}
.tick-frame-inner{padding:clamp(20px,3vw,40px)}

.legend{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13px;color:var(--ink-soft)}
.legend-item{display:inline-flex;align-items:center;gap:8px}
.legend-swatch{flex:0 0 auto;width:10px;height:10px;border-radius:2px;background:var(--lake)}
.legend-swatch--sky{background:var(--sky)}
.legend-swatch--sun{background:var(--sun)}
.legend-swatch--red{background:var(--flag-red)}
.legend-swatch--yellow{background:var(--flag-yellow)}
.legend-swatch--green{background:var(--flag-green)}
.legend-swatch--mute{background:var(--line-strong)}

.data-card{position:relative;background:var(--paper);border:1px solid var(--line);border-top:2px solid var(--sun);border-radius:var(--r);box-shadow:var(--shadow);padding:clamp(18px,2.4vw,28px);transition:box-shadow .24s var(--ease),transform .24s var(--ease)}
.data-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-2px)}
.data-card--sea{border-top-color:var(--lake)}
.data-card--sky{border-top-color:var(--sky)}
.data-card--flat{box-shadow:none}
.data-card--flat:hover{transform:none}
.data-card-title{font-weight:800;font-size:1.05rem;line-height:1.4}
.data-card-meta{margin-top:6px;font-family:var(--font-mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink-mute)}
.data-card-body{margin-top:12px;font-size:15px;line-height:1.75;color:var(--ink-soft)}

.index-list{display:flex;flex-direction:column;counter-reset:idx}
.index-item{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:baseline;padding:14px 4px;border-bottom:1px solid var(--line);counter-increment:idx}
.index-item::before{content:counter(idx,decimal-leading-zero);font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--lake)}
.index-item a{font-weight:700}
.index-item a:hover{color:var(--sky)}
.index-item span{font-size:13px;color:var(--ink-soft)}

.steps{display:grid;gap:12px;counter-reset:step}
.step{position:relative;border:1px solid var(--line);border-radius:var(--r);background:var(--paper);padding:16px 18px 16px 60px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:16px;top:15px;width:26px;height:26px;display:grid;place-items:center;border-radius:50%;background:var(--mist);color:var(--sky);font-family:var(--font-mono);font-size:12px;font-weight:600}
.step-title{font-weight:800;font-size:1rem;line-height:1.45}
.step-body{margin-top:8px;font-size:14.5px;line-height:1.7;color:var(--ink-soft)}

.note-block{border-left:2px solid var(--lake);background:var(--mist);padding:14px 16px;border-radius:0 var(--r) var(--r) 0;font-size:14px;line-height:1.7;color:#2C4653}
.note-block-title{margin-bottom:4px;font-size:14px;font-weight:700;color:var(--ink)}

.timeline{position:relative;display:grid;gap:18px;padding-left:26px}
.timeline::before{content:"";position:absolute;left:5px;top:8px;bottom:8px;width:1px;background:linear-gradient(180deg,var(--lake),var(--sky) 55%,var(--sun))}
.timeline-item{position:relative}
.timeline-item::before{content:"";position:absolute;left:-25px;top:12px;width:9px;height:9px;border-radius:50%;background:var(--paper);border:2px solid var(--lake)}
.timeline-item[data-state="normal"]::before{border-color:var(--flag-green)}
.timeline-item[data-state="moving"]::before{border-color:var(--flag-yellow)}
.timeline-item[data-state="moved"]::before{border-color:var(--flag-red)}

.filter-bar{display:flex;flex-wrap:wrap;gap:8px}
.filter-btn{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;padding:7px 13px;border:1px solid var(--line);border-radius:999px;background:var(--paper);color:var(--ink-soft);transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease)}
.filter-btn:hover{border-color:var(--line-strong);color:var(--ink)}
.filter-btn[aria-pressed="true"]{background:var(--night);color:#EAF2FA;border-color:var(--night)}

.breadcrumb{font-size:13px;color:var(--ink-soft)}
.breadcrumb-list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb-item{display:flex;align-items:center;gap:8px}
.breadcrumb-item+.breadcrumb-item::before{content:"/";font-family:var(--font-mono);color:var(--line-strong)}
.breadcrumb a:hover{color:var(--sky);text-decoration:underline;text-underline-offset:3px}
.breadcrumb [aria-current="page"]{color:var(--ink);font-weight:600}

.copy-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.copy-btn{font-size:12.5px;font-weight:700;padding:6px 13px;border-radius:999px;border:1px solid var(--line);background:var(--paper);color:var(--sky);transition:background .2s var(--ease),border-color .2s var(--ease)}
.copy-btn:hover{border-color:var(--sky);background:rgba(18,100,192,.06)}
.copy-status{font-family:var(--font-mono);font-size:12.5px;color:var(--ink-soft)}

.img-frame{position:relative;overflow:hidden;border:1px solid var(--line);border-radius:var(--r);aspect-ratio:16/9;background:linear-gradient(180deg,rgba(18,100,192,.10),rgba(14,139,139,.12)),var(--mist)}
.img-frame>img,.img-frame>picture>img{width:100%;height:100%;object-fit:cover}
.img-frame--portrait{aspect-ratio:3/4}
.img-frame--square{aspect-ratio:1/1}
.img-frame--wide{aspect-ratio:21/9}
.img-frame-caption{display:flex;align-items:baseline;gap:8px;margin-top:10px;font-size:13px;color:var(--ink-soft)}
.img-frame-caption::before{content:"";flex:0 0 auto;width:14px;height:1px;background:var(--lake);transform:translateY(-4px)}

.to-top{position:fixed;right:clamp(14px,2vw,28px);bottom:clamp(14px,2vw,28px);z-index:75;display:inline-flex;align-items:center;gap:8px;padding:10px 15px;border-radius:999px;background:var(--night);color:#EAF2FA;font-size:13px;font-weight:700;border:1px solid rgba(215,226,236,.22);box-shadow:0 12px 32px rgba(7,26,43,.24);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility 0s linear .24s}
.to-top.is-visible{opacity:1;visibility:visible;transform:none;transition:opacity .24s var(--ease),transform .24s var(--ease),visibility 0s linear 0s}
.to-top::before{content:"↑";font-family:var(--font-mono)}

[data-reveal]{opacity:1}
html.js [data-reveal]{opacity:0;transform:translateY(16px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
html.js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- 11. Responsive ---------- */
@media (max-width:1180px){
  .header-cta-secondary{display:none}
}
@media (max-width:1080px){
  .status-chip{display:none}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:1024px){
  .stage-grid{grid-template-columns:repeat(6,minmax(0,1fr))}
  .span-3,.span-4,.span-5,.span-6,.span-7,.span-8,.span-9,.span-10,.span-11,.span-12{grid-column:span 6}
  .section-head{grid-template-columns:1fr}
  .rail-note{writing-mode:horizontal-tb;letter-spacing:.2em}
}
@media (max-width:899px){
  :root{--header-h:60px}
  body{padding-bottom:86px}
  .header-shell{grid-template-columns:1fr auto;gap:10px}
  .header-cta{display:none}
  .nav-toggle{display:inline-flex}
  .site-header[data-open]{
    --hd-fg:#EAF2FA;
    --hd-fg-soft:rgba(234,242,250,.66);
    --hd-line:rgba(215,226,236,.22);
    background:rgba(7,26,43,.96);
    border-bottom-color:rgba(215,226,236,.18);
  }
  .site-header[data-open]::after{content:"";position:fixed;top:var(--header-h);left:0;right:0;bottom:0;z-index:1;background:rgba(7,26,43,.46)}
  .primary-nav{
    position:fixed;top:var(--header-h);right:0;bottom:0;z-index:3;
    width:min(88vw,380px);
    padding:26px 22px calc(120px);
    background:var(--cloud);
    border-left:1px solid var(--line);
    box-shadow:-18px 0 48px rgba(7,26,43,.18);
    overflow-y:auto;
    visibility:hidden;
    transform:translateX(102%);
    transition:transform .28s var(--ease),visibility 0s linear .28s;
  }
  .site-header[data-open] .primary-nav{visibility:visible;transform:translateX(0);transition:transform .28s var(--ease),visibility 0s linear 0s}
  .nav-legend{display:block;margin-bottom:10px;font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;color:var(--lake)}
  .nav-list{flex-direction:column;align-items:stretch;gap:0;counter-reset:navidx}
  .nav-item{border-bottom:1px solid var(--line);counter-increment:navidx}
  .nav-link{display:flex;align-items:baseline;gap:14px;padding:15px 2px;font-size:18px;font-weight:700;color:var(--ink);opacity:1}
  .nav-link::before{content:counter(navidx,decimal-leading-zero);font-family:var(--font-mono);font-size:11.5px;font-weight:500;color:var(--lake)}
  .nav-link::after{display:none}
  .mobile-dock{
    display:grid;grid-template-columns:1fr 1fr;gap:8px;
    position:fixed;left:12px;right:12px;bottom:12px;z-index:70;
    padding:8px;border-radius:12px;
    background:rgba(7,26,43,.93);
    -webkit-backdrop-filter:blur(8px);
    backdrop-filter:blur(8px);
    border:1px solid rgba(215,226,236,.18);
    box-shadow:0 12px 32px rgba(7,26,43,.28);
  }
  .to-top{bottom:88px}
  .footer-note{max-width:none}
}
@media (max-width:640px){
  .stage-grid{display:flex;flex-direction:column}
  .footer-top{grid-template-columns:minmax(0,1fr);gap:26px}
  .section-head{gap:10px}
  .index-item{grid-template-columns:auto 1fr;row-gap:4px}
  .index-item span{grid-column:2}
  .footer-legal{flex-direction:column;align-items:flex-start}
  .footer-link--mono{font-size:12px}
}

/* ---------- 12. Motion & a11y ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;transition-delay:0s !important}
  .status-dot{animation:none}
  html.js [data-reveal]{opacity:1;transform:none}
}
body:has(.site-header[data-open]){overflow:hidden}