/* RESON 3.0 · paper / ink · one physics: resonance
   Brand marks kept: RESON wordmark (Syncopate), Syncopate + Noto Sans SC 900 display, outline giant type, black/white. */

:root {
    --paper: #f3f2ee;
    --ink: #0d0d0e;
    --bg: var(--paper);
    --fg: var(--ink);
    --line: color-mix(in srgb, var(--fg) 14%, transparent);
    --mute: color-mix(in srgb, var(--fg) 58%, transparent);
    --display: 'Syncopate', 'Noto Sans SC', sans-serif;
    --zh: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --body: 'Manrope', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --out: cubic-bezier(.19, 1, .22, 1);
    --io: cubic-bezier(.76, 0, .24, 1);
    --gut: clamp(20px, 4.2vw, 64px);
    --hd: 76px;
    color-scheme: light;
}
/* night is its own palette, not an inversion: lower luminance, lower contrast, warm grey ink, no bright slabs */
:root { --night: #141416; --night-deep: #0b0b0c; --moon: #d9d6cf; }
:root[data-theme="dark"] { --bg: var(--night); --fg: var(--moon); color-scheme: dark; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) { --bg: var(--night); --fg: var(--moon); color-scheme: dark; } }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-behavior: auto; }
body {
    background: var(--bg); color: var(--fg); font: 400 16px/1.6 var(--body);
    -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: clip;
    transition: background-color .6s var(--out), color .6s var(--out);
}
:lang(zh-Hans) body, body:lang(zh-Hans) { font-family: var(--zh); }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ol, ul { list-style: none; }
::selection { background: var(--fg); color: var(--bg); }
:focus-visible { outline: 1.5px solid currentColor; outline-offset: 4px; }
.skip { position: fixed; left: 12px; top: -60px; z-index: 100; background: var(--fg); color: var(--bg); padding: 10px 14px; font-size: 12px; }
.skip:focus { top: 12px; }
.ic { width: 1.05em; height: 1.05em; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: square; flex: none; }
.ic-play { fill: currentColor; stroke: none; }

.wrap { width: 100%; max-width: 1680px; margin-inline: auto; padding-inline: var(--gut); }
.grid { display: grid; grid-template-columns: 1fr; gap: clamp(2rem, 5vw, 6rem); }
@media (min-width: 960px) { .grid { grid-template-columns: minmax(200px, 3fr) 9fr; } }
.grid > * { min-width: 0; }

/* ---------- type ---------- */
.display { font-family: var(--display); font-weight: 700; text-transform: uppercase; letter-spacing: -.02em; line-height: .9; }
:lang(zh-Hans) .display { font-family: var(--zh); font-weight: 900; letter-spacing: 0; line-height: 1.02; }
.display .ln { display: block; }
.h2 { font: 700 clamp(1.4rem, 2.6vw, 2.4rem)/1.08 var(--display); text-transform: uppercase; letter-spacing: -.01em; max-width: 22ch; }
:lang(zh-Hans) .h2 { font-family: var(--zh); font-weight: 900; letter-spacing: 0; }
.eyebrow { display: flex; gap: 1.1em; align-items: baseline; font: 700 10px/1 var(--display); letter-spacing: .3em; text-transform: uppercase; color: var(--mute); margin-bottom: clamp(1.6rem, 4vh, 3rem); }
:lang(zh-Hans) .eyebrow { font-family: var(--zh); letter-spacing: .24em; font-size: 12px; }
.eyebrow-n { color: var(--fg); }
.link { display: inline-flex; align-items: center; gap: .7em; font: 700 11px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; padding-bottom: .8em; background: linear-gradient(currentColor, currentColor) 0 100% / 100% 1px no-repeat; transition: background-size .6s var(--out); }
.link:hover { background-size: 0 1px; background-position: 100% 100%; }
.link .ic { transition: transform .6s var(--out); }
.link:hover .ic { transform: translateX(5px); }
:lang(zh-Hans) .link { font-family: var(--zh); letter-spacing: .12em; font-size: 13px; }

/* ---------- field canvas + grain ---------- */
.field { position: fixed; inset: 0; width: 100vw; height: 100vh; height: 100lvh; z-index: 0; pointer-events: none; }
.grain { position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: .07; mix-blend-mode: overlay; background-image: var(--grain, none); background-size: 180px; }
main, .ft { position: relative; z-index: 1; }

/* ---------- header (difference blend: legible over paper, ink and covers) ---------- */
.hd {
    position: fixed; inset: 0 0 auto; z-index: 50; height: var(--hd); padding: env(safe-area-inset-top, 0) var(--gut) 0;
    display: flex; align-items: center; gap: 2rem; color: #fff; mix-blend-mode: difference;
}
.mark { font-family: 'Syncopate', sans-serif; font-weight: 900; font-size: 1.5rem; letter-spacing: -0.05em; margin-right: auto; }
.nav { display: none; gap: 2.2rem; }
@media (min-width: 900px) { .nav { display: flex; } }
.nav-a { position: relative; font: 700 10.5px/1 var(--display); letter-spacing: .22em; text-transform: uppercase; padding: .6em 0; }
:lang(zh-Hans) .nav-a { font-family: var(--zh); font-size: 13px; letter-spacing: .14em; }
.nav-a::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .6s var(--out); }
.nav-a:hover::after, .nav-a[aria-current]::after { transform: scaleX(1); transform-origin: left; }
.tools { display: flex; align-items: center; gap: .6rem; }
.tool { height: 36px; min-width: 36px; display: inline-grid; place-items: center; border: 1px solid currentColor; border-radius: 99px; padding: 0 .9rem; font: 700 10px/1 var(--display); letter-spacing: .18em; }
.tool.lang:lang(zh-Hans) { font-family: var(--zh); font-size: 12px; letter-spacing: .1em; }
.theme { padding: 0; width: 36px; }
.theme svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.4; }
.theme .fill { fill: currentColor; stroke: none; transition: transform .7s var(--out); transform-origin: 12px 12px; }
[data-theme="dark"] .theme .fill { transform: rotate(180deg); }
.menu-btn { width: 36px; padding: 0; display: grid; gap: 5px; place-content: center; }
.menu-btn span { width: 14px; height: 1.4px; background: currentColor; transition: transform .5s var(--out); }
.menu-btn[aria-expanded="true"] span:first-child { transform: translateY(3.2px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:last-child { transform: translateY(-3.2px) rotate(-45deg); }
@media (min-width: 900px) { .menu-btn { display: none; } }
.sheet { position: fixed; inset: 0; z-index: 45; background: var(--fg); color: var(--bg); display: flex; flex-direction: column; justify-content: center; padding: var(--hd) var(--gut) 3rem; clip-path: circle(0% at calc(100% - 40px) 38px); transition: clip-path .8s var(--io); }
.sheet.is-open { clip-path: circle(150% at calc(100% - 40px) 38px); }
.sheet-a { display: flex; align-items: baseline; gap: 1rem; font: 700 clamp(2.2rem, 11vw, 4.5rem)/1.08 var(--display); text-transform: uppercase; letter-spacing: -.02em; padding: .25em 0; border-bottom: 1px solid color-mix(in srgb, var(--bg) 16%, transparent); }
:lang(zh-Hans) .sheet-a { font-family: var(--zh); font-weight: 900; }
.sheet-n { font-size: 11px; letter-spacing: .2em; opacity: .5; }
.sheet-foot { margin-top: auto; font: 700 10px/1 var(--display); letter-spacing: .24em; opacity: .5; }

/* ---------- home hero: the plate ---------- */
.hero { position: relative; min-height: 100svh; display: grid; place-items: center; text-align: center; padding: calc(var(--hd) + 2vh) var(--gut) 3vh; isolation: isolate; }
.hero-in { width: 100%; display: grid; justify-items: center; gap: clamp(1.4rem, 4vh, 3rem); }
.hero-kicker { font: 700 10px/1.4 var(--display); letter-spacing: .34em; text-transform: uppercase; color: var(--mute); }
:lang(zh-Hans) .hero-kicker { font-family: var(--zh); letter-spacing: .3em; font-size: 12px; }
.hero-title { font-size: clamp(2rem, 10.6vw, 12.5rem); }
:lang(zh-Hans) .hero-title { font-size: clamp(4.4rem, 15.5vw, 14.5rem); line-height: 1.06; letter-spacing: .02em; }
.hero-title .ln, .phero-title .ln { color: transparent; -webkit-text-stroke: 1.2px var(--fg); transition: color .9s var(--out), -webkit-text-stroke-color .9s var(--out); }
.hero-title.is-locked .ln, .phero-title.is-locked .ln { color: var(--fg); }
.hero-title.is-locked .ln:nth-child(2) { transition-delay: .08s; }
.hero-title.is-locked .ln:nth-child(3) { transition-delay: .16s; }
.hub { position: absolute; top: 50%; display: none; text-align: left; font: 700 9px/1.6 var(--display); letter-spacing: .3em; text-transform: uppercase; }
.hub i { display: block; width: 7px; height: 7px; border-radius: 50%; background: var(--fg); margin-bottom: 14px; box-shadow: 0 0 0 0 var(--fg); animation: ping 2.8s var(--out) infinite; }
.hub b { display: block; font-weight: 700; }
.hub small { display: block; font-size: 8px; color: var(--mute); letter-spacing: .22em; }
.hub-a { left: var(--gut); }
.hub-b { right: var(--gut); text-align: right; }
.hub-b i { margin-left: auto; }
:lang(zh-Hans) .hub { font-family: var(--zh); font-size: 12px; letter-spacing: .2em; }
@media (min-width: 1200px) { .hub { display: block; } }
@keyframes ping { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--fg) 50%, transparent); } 80%, 100% { box-shadow: 0 0 0 22px transparent; } }

/* ---------- inner page hero ---------- */
.phero { position: relative; min-height: 78svh; display: flex; align-items: flex-end; padding: calc(var(--hd) + 14vh) 0 clamp(3rem, 8vh, 6rem); }
.phero-title { font-size: clamp(2rem, 11.4vw, 14rem); }
:lang(zh-Hans) .phero-title { font-size: clamp(4.4rem, 16vw, 15rem); }
.phero-sub { margin-top: 2rem; max-width: 46ch; font-size: clamp(1rem, 1.4vw, 1.25rem); color: var(--mute); }
.nf .link { margin-top: 2.4rem; }

/* ---------- ticker (original black strip, velocity-skewed) ---------- */
.tk { position: relative; z-index: 2; background: var(--fg); color: var(--bg); overflow: hidden; padding: 1.4rem 0; white-space: nowrap; transform: skewY(var(--skew, 0deg)); transform-origin: center; }
.tk-track { display: inline-flex; animation: tk 38s linear infinite; }
.tk-i, .tk-s { font: 700 clamp(1.6rem, 3.6vw, 3rem)/1 var(--display); text-transform: uppercase; padding-right: 2.4rem; }
.tk-i [lang] { font-family: var(--zh); font-weight: 900; }
.tk-s { opacity: .35; }
.tk-pillars { background: transparent; color: var(--fg); border-block: 1px solid var(--line); }
.tk-pillars .tk-i { color: transparent; -webkit-text-stroke: 1px var(--fg); }
@keyframes tk { to { transform: translateX(-50%); } }

/* ---------- sections + ink phase ---------- */
:root, [data-phase], .sheet { --line: color-mix(in srgb, var(--fg) 14%, transparent); --mute: color-mix(in srgb, var(--fg) 58%, transparent); }
.sec { position: relative; padding-block: clamp(6rem, 16vh, 12rem); background: var(--bg); }
[data-phase="ink"] { --bg: var(--ink); --fg: var(--paper); background: var(--ink); color: var(--paper); }
:root[data-theme="dark"] [data-phase="ink"] { --bg: var(--night-deep); --fg: var(--moon); background: var(--night-deep); color: var(--moon); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) [data-phase="ink"] { --bg: var(--night-deep); --fg: var(--moon); background: var(--night-deep); color: var(--moon); } }
@supports (animation-timeline: view()) {
    @media (prefers-reduced-motion: no-preference) {
        .sec[data-phase="ink"] { animation: phase linear both; animation-timeline: view(); animation-range: entry 0% entry 70%; }
        @keyframes phase { from { clip-path: inset(9% 7% 0 7% round 28px); } to { clip-path: inset(0 0 0 0 round 0); } }
        .h2, .claim-sec .belief p, .eng, .mk, .dep, .off { animation: rise linear both; animation-timeline: view(); animation-range: entry 0% entry 55%; }
        @keyframes rise { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: none; } }
    }
}

/* ---------- claim: read to fill ---------- */
.claim { font: 700 clamp(1.5rem, 3.4vw, 3.4rem)/1.14 var(--display); text-transform: uppercase; letter-spacing: -.012em; }
:lang(zh-Hans) .claim { font-family: var(--zh); font-weight: 900; letter-spacing: 0; line-height: 1.3; font-size: clamp(1.8rem, 4vw, 3.8rem); }
.claim .w { opacity: var(--o, .13); transition: opacity .2s linear; }
.belief { display: grid; gap: 1.2rem; margin: clamp(2.4rem, 6vh, 4rem) 0; max-width: 58ch; color: var(--mute); font-size: clamp(1rem, 1.2vw, 1.15rem); }
@media (min-width: 960px) { .belief { grid-template-columns: 1fr 1fr; gap: 3rem; max-width: none; } }

/* ---------- signal chain (pinned) ---------- */
.chain-sec { padding: 0; height: 320vh; }
.chain-pin { position: sticky; top: 0; height: 100svh; display: flex; align-items: center; overflow: hidden; }
.chain { position: relative; margin-top: clamp(2.5rem, 8vh, 6rem); }
.chain-wave { position: absolute; left: 0; right: 0; top: 0; width: 100%; height: 120px; overflow: visible; }
.chain-wave path { fill: none; stroke: var(--fg); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.chain-list { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(1rem, 3vw, 3rem); padding-top: 160px; }
.chain-step { opacity: .22; transform: translateY(18px); transition: opacity .7s var(--out), transform .7s var(--out); }
.chain-step.is-on { opacity: 1; transform: none; }
.chain-n { display: block; font: 700 clamp(2.6rem, 6vw, 6rem)/.85 var(--display); color: transparent; -webkit-text-stroke: 1px var(--fg); margin-bottom: 1.4rem; transition: color .7s var(--out); }
.chain-step.is-on .chain-n { color: var(--fg); }
.chain-t { font: 700 clamp(.9rem, 1.3vw, 1.2rem)/1.2 var(--display); text-transform: uppercase; margin-bottom: .8rem; }
:lang(zh-Hans) .chain-t { font-family: var(--zh); font-weight: 900; font-size: clamp(1.1rem, 1.6vw, 1.5rem); }
.chain-d { color: var(--mute); font-size: .95rem; max-width: 32ch; }
@media (max-width: 899px) {
    .chain-sec { height: auto; }
    .chain-pin { position: relative; height: auto; padding-block: 6rem; }
    .chain-list { grid-template-columns: 1fr; padding-top: 2rem; gap: 2.4rem; }
    .chain-wave { display: none; }
    .chain-step { opacity: 1; transform: none; }
}

/* ---------- work: the dial ---------- */
.work-sec { overflow: hidden; }
.work-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 2rem; }
.lc { display: flex; flex-wrap: wrap; gap: clamp(1.6rem, 4vw, 4rem); }
.lc li { display: grid; gap: .35rem; }
.lc-n { font: 700 clamp(2.4rem, 4.4vw, 4.4rem)/.85 var(--display); }
.lc-t { font: 700 10px/1.3 var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--mute); }
:lang(zh-Hans) .lc-t { font-family: var(--zh); font-size: 13px; letter-spacing: .1em; }
.lc-s { font-size: 11px; color: var(--mute); }
.dial { margin-top: clamp(3rem, 8vh, 6rem); overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; cursor: grab; overscroll-behavior-x: contain; }
.dial::-webkit-scrollbar { display: none; }
.dial.is-drag { cursor: grabbing; scroll-snap-type: none; }
.dial-track { display: flex; gap: clamp(1.2rem, 3vw, 3rem); padding-inline: calc(50vw - min(21vw, 210px)); width: max-content; }
.dial-i { scroll-snap-align: center; width: min(42vw, 420px); flex: none; transform: scale(var(--s, .82)); transition: transform .25s linear; }
@media (max-width: 700px) { .dial-i { width: 68vw; } .dial-track { padding-inline: 16vw; } }
.dial-a { display: grid; gap: 1.2rem; }
.dial-meta { display: grid; gap: .3rem; opacity: var(--m, 0); transition: opacity .3s; }
.dial-t { font: 700 clamp(1rem, 1.6vw, 1.5rem)/1 var(--display); text-transform: uppercase; }
:lang(zh-Hans) .dial-t { font-family: var(--zh); font-weight: 900; }
.dial-ar { font-size: .85rem; color: var(--mute); }
.work-foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; margin-top: 2.6rem; }
.dial-hint { font-size: .8rem; color: var(--mute); }

/* covers: halftone print until tuned */
.cv { position: relative; display: block; aspect-ratio: 1; overflow: hidden; background: #000; }
.cv img { width: 100%; height: 100%; object-fit: cover; }
.cv .ht { position: absolute; inset: 0; background-size: 100% 100%; opacity: var(--h, 1); pointer-events: none; image-rendering: auto; }

/* ---------- network ---------- */
.map { position: relative; aspect-ratio: 16 / 10; margin-bottom: 2.4rem; }
.map canvas { width: 100%; height: 100%; display: block; }
.hubs { border-top: 1px solid var(--line); }
.hub-row { display: grid; grid-template-columns: 3rem 1.4fr 1fr; gap: .4rem 1.2rem; padding: 1.3rem 0; border-bottom: 1px solid var(--line); align-items: baseline; transition: padding .6s var(--out); }
.hub-row.is-on, .hub-row:hover { padding-left: .8rem; }
.hub-n { font: 700 11px/1 var(--display); color: var(--mute); }
.hub-city { font: 700 clamp(1rem, 1.6vw, 1.45rem)/1.1 var(--display); text-transform: uppercase; }
:lang(zh-Hans) .hub-city { font-family: var(--zh); font-weight: 900; }
.hub-role { font: 700 10px/1.4 var(--display); letter-spacing: .18em; text-transform: uppercase; }
:lang(zh-Hans) .hub-role { font-family: var(--zh); font-size: 13px; letter-spacing: .06em; }
.hub-what { grid-column: 2 / -1; color: var(--mute); font-size: .9rem; }
@media (min-width: 700px) { .hub-row { grid-template-columns: 3rem 1.4fr 1fr 1.2fr; } .hub-what { grid-column: auto; } }

/* ---------- team ---------- */
.tms { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: clamp(1.2rem, 3vw, 3rem); }
.tm { display: grid; gap: .5rem; }
.tm-img { position: relative; display: block; aspect-ratio: 4 / 5; overflow: hidden; background: #000; margin-bottom: .8rem; }
.tm-img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.05); transition: transform 1.2s var(--out); }
.tm:hover .tm-img img { transform: scale(1.04); }
.tm-name { font: 700 1.1rem/1.1 var(--display); text-transform: uppercase; }
:lang(zh-Hans) .tm-name { font-family: var(--zh); font-weight: 900; font-size: 1.3rem; }
.tm-role { font: 700 10px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--mute); }
.tm-img .ht, .lead-img .ht { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: var(--h, 1); }

/* ---------- doors (the original accordion, rebuilt) ---------- */
.doors { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
@media (min-width: 900px) { .doors { flex-direction: row; height: 68vh; min-height: 460px; border-top: 0; } }
.door { position: relative; flex: 1; display: flex; flex-direction: column; justify-content: flex-end; gap: .9rem; padding: clamp(1.6rem, 3vw, 2.6rem); border-bottom: 1px solid var(--line); overflow: hidden; isolation: isolate; transition: flex-grow .9s var(--out), color .4s; min-height: 260px; }
@media (min-width: 900px) { .door { border-bottom: 0; border-right: 1px solid var(--line); } .door:last-child { border-right: 0; } .doors:hover .door:hover { flex-grow: 2.4; } }
.door::before { content: ""; position: absolute; inset: 0; z-index: -1; background: var(--fg); clip-path: circle(0 at var(--px, 50%) var(--py, 100%)); transition: clip-path .9s var(--out); }
.door:hover::before, .door:focus-visible::before { clip-path: circle(160% at var(--px, 50%) var(--py, 100%)); }
.door:hover, .door:focus-visible { color: var(--bg); }
.door-tex { position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; font: 700 clamp(2.4rem, 5vw, 4.4rem)/.95 var(--display); text-transform: uppercase; color: transparent; -webkit-text-stroke: 1px currentColor; opacity: .12; word-break: break-all; transition: opacity .6s; }
.door-tex span { display: block; animation: drift 24s linear infinite; }
.door:hover .door-tex { opacity: .22; }
@keyframes drift { to { transform: translateY(-50%); } }
.door-who { font-size: clamp(1.6rem, 2.7vw, 3.8rem); white-space: nowrap; }
:lang(zh-Hans) .door-who { font-size: clamp(2rem, 3.4vw, 4.4rem); }
.door-what { font-size: 1rem; max-width: 30ch; opacity: .75; }
.door-to { display: inline-flex; align-items: center; gap: .7em; font: 700 10.5px/1 var(--display); letter-spacing: .18em; text-transform: uppercase; }
.door-to .ic { transition: transform .6s var(--out); }
.door:hover .door-to .ic { transform: translateX(6px); }
.door-solo { min-height: 46vh; }

/* ---------- releases page ---------- */
.feat { display: grid; gap: clamp(2rem, 5vw, 5rem); align-items: end; }
@media (min-width: 960px) { .feat { grid-template-columns: 5fr 6fr; } }
.feat-line { font: 700 10px/1 var(--display); letter-spacing: .26em; text-transform: uppercase; opacity: .6; margin-bottom: 1.4rem; }
.feat-t { font-size: clamp(3rem, 8vw, 8rem); }
.feat-ar { margin: 1rem 0 2rem; font: 700 12px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; }
:lang(zh-Hans) .feat-ar, :lang(zh-Hans) .feat-line { font-family: var(--zh); letter-spacing: .1em; font-size: 13px; }
.feat-q { font-size: clamp(1.1rem, 1.6vw, 1.4rem); line-height: 1.5; max-width: 34ch; opacity: .85; }
.stats { display: flex; gap: clamp(2rem, 5vw, 5rem); margin: 2.6rem 0; }
.stat { display: grid; gap: .5rem; }
.stat-v { font-size: clamp(2.4rem, 5vw, 5rem); }
.stat-l { font: 700 10px/1.3 var(--display); letter-spacing: .2em; text-transform: uppercase; opacity: .6; }
:lang(zh-Hans) .stat-l { font-family: var(--zh); font-size: 12px; letter-spacing: .08em; }
.plays { display: flex; flex-wrap: wrap; gap: .8rem; }
.play { display: inline-flex; align-items: center; gap: .6rem; height: 42px; padding: 0 1.2rem 0 1rem; border: 1px solid currentColor; border-radius: 99px; font: 700 10px/1 var(--display); letter-spacing: .16em; text-transform: uppercase; transition: background .4s, color .4s; }
.play:hover { background: var(--fg); color: var(--bg); }
:lang(zh-Hans) .play { font-family: var(--zh); font-size: 12px; letter-spacing: .06em; }
.rels { border-top: 1px solid var(--line); margin-bottom: clamp(4rem, 10vh, 7rem); }
.rel { display: grid; grid-template-columns: 72px 1fr; gap: .4rem 1.4rem; align-items: center; padding: 1.2rem 0; border-bottom: 1px solid var(--line); scroll-margin-top: 30vh; }
.rel-cv { grid-row: span 2; }
.rel-t { font-size: clamp(1.4rem, 3vw, 2.8rem); }
.rel-ar { font-size: .9rem; color: var(--mute); }
.rel-y { display: none; }
.rel-plays { grid-column: 2; }
@media (min-width: 900px) {
    .rel { grid-template-columns: 120px 3fr 2fr 4rem auto; gap: 2rem; }
    .rel-cv { grid-row: auto; }
    .rel-y { display: block; font: 700 11px/1 var(--display); color: var(--mute); }
    .rel-plays { grid-column: auto; }
}
.rel:target, .rel.is-target { background: color-mix(in srgb, var(--fg) 5%, transparent); }
.loc-status { font-size: .9rem; opacity: .6; margin-top: -1rem; }
.locs { border-top: 1px solid var(--line); }
.loc { display: grid; grid-template-columns: 3rem 1fr auto; gap: 1rem; align-items: baseline; padding: 1.4rem 0; border-bottom: 1px solid var(--line); }
.loc-n { font: 700 11px/1 var(--display); opacity: .5; }
.loc-t { overflow-wrap: anywhere; font-size: clamp(1.4rem, 4vw, 3.6rem); color: transparent; -webkit-text-stroke: 1px var(--fg); }
.loc-s { font: 700 9.5px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; opacity: .6; }
:lang(zh-Hans) .loc-s { font-family: var(--zh); font-size: 12px; letter-spacing: .06em; }

/* ---------- about ---------- */
.engs { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); border-top: 1px solid var(--line); margin-top: 3rem; }
.eng { padding: 2rem 2rem 2.4rem 0; border-bottom: 1px solid var(--line); }
.eng-n { display: block; font: 700 3.2rem/.85 var(--display); color: transparent; -webkit-text-stroke: 1px var(--fg); margin-bottom: 1.4rem; }
.eng-t { font: 700 1rem/1.2 var(--display); text-transform: uppercase; margin-bottom: .7rem; }
:lang(zh-Hans) .eng-t { font-family: var(--zh); font-weight: 900; font-size: 1.25rem; }
.eng p { opacity: .7; font-size: .95rem; }
/* leadership: three equal frames, faces at one size (v3/tools/portraits.py) */
.leads { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: clamp(2.4rem, 4vw, 4rem); }
.lead { display: grid; gap: 1.2rem; align-content: start; }
.lead-img { position: relative; display: block; aspect-ratio: 4 / 5; overflow: hidden; background: #000; }
.lead-img img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1); }
.lead-role { font: 700 10px/1 var(--display); letter-spacing: .26em; text-transform: uppercase; color: var(--mute); margin-bottom: .8rem; }
.lead-name { font-size: clamp(1.4rem, 2.2vw, 2.2rem); margin-bottom: 1rem; }
.lead-bio { max-width: 40ch; font-size: .98rem; color: var(--mute); }

/* ---------- investors ---------- */
.mks { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 0; border-top: 1px solid var(--line); }
.mk { padding: 2rem 2rem 2.6rem 0; border-bottom: 1px solid var(--line); display: grid; gap: .4rem; }
.mk-l { font: 700 11px/1.3 var(--display); letter-spacing: .2em; text-transform: uppercase; }
:lang(zh-Hans) .mk-l { font-family: var(--zh); font-size: 14px; letter-spacing: .08em; }
.mk-b { font-size: .75rem; color: var(--mute); letter-spacing: .1em; }
.mk-v { font-size: clamp(2.8rem, 6vw, 6rem); margin: 1.4rem 0 .6rem; white-space: nowrap; }
.mk-n { color: var(--mute); font-size: .9rem; }
.pillars { display: grid; gap: .6rem; margin-top: 1rem; }
.pillars li { font: 700 clamp(1rem, 1.5vw, 1.3rem)/1.1 var(--display); text-transform: uppercase; color: transparent; -webkit-text-stroke: 1px var(--fg); }
:lang(zh-Hans) .pillars li { font-family: var(--zh); font-weight: 900; }
.proj-note { color: var(--mute); margin-bottom: 2rem; font-size: .9rem; }
.tbl-wrap { overflow-x: auto; }
.proj { width: 100%; min-width: 640px; border-collapse: collapse; }
.proj th, .proj td { text-align: left; padding: 1.2rem 1rem 1.2rem 0; border-bottom: 1px solid var(--line); vertical-align: bottom; }
.proj thead th { font: 700 10px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; color: var(--mute); }
.proj tbody th { font: 700 11px/1.3 var(--display); letter-spacing: .16em; text-transform: uppercase; width: 22%; }
:lang(zh-Hans) .proj tbody th { font-family: var(--zh); font-size: 14px; letter-spacing: .06em; }
.proj td { width: 26%; }
.bar { display: block; height: 3px; background: var(--fg); width: calc(var(--w) * 100%); transform-origin: left; margin-bottom: .8rem; transform: scaleX(var(--g, 1)); transition: transform 1.4s var(--out); }
.bv { font: 700 clamp(1.1rem, 2vw, 1.8rem)/1 var(--display); }

/* ---------- contact ---------- */
.deps { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: clamp(3rem, 6vw, 5rem) clamp(2rem, 4vw, 4rem); }
.dep { display: grid; gap: .8rem; align-content: start; }
.dep-n { font: 700 10px/1 var(--display); letter-spacing: .24em; text-transform: uppercase; color: var(--mute); }
.dep-t { font-size: clamp(1.6rem, 3vw, 2.8rem); }
.dep-d { color: var(--mute); max-width: 40ch; }
.dep-m { justify-self: start; font-size: clamp(1rem, 1.6vw, 1.35rem); background: linear-gradient(currentColor, currentColor) 0 100% / 0 1px no-repeat; transition: background-size .6s var(--out); padding-bottom: .2em; overflow-wrap: anywhere; }
.dep-m:hover { background-size: 100% 1px; }
.offs { display: grid; gap: 3rem; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.off { display: grid; gap: .7rem; align-content: start; }
.off-c { font-size: clamp(2.4rem, 5vw, 5rem); }
.off-r { font: 700 10px/1.4 var(--display); letter-spacing: .2em; text-transform: uppercase; opacity: .6; }
.off a { text-decoration: underline; text-underline-offset: .3em; }
.form { display: grid; gap: 1.4rem; max-width: 760px; }
.fld { display: grid; gap: .4rem; border-bottom: 1px solid var(--line); padding-bottom: .6rem; transition: border-color .4s; }
.fld:focus-within { border-color: var(--fg); }
.fld span { font: 700 9.5px/1 var(--display); letter-spacing: .22em; text-transform: uppercase; color: var(--mute); }
:lang(zh-Hans) .fld span { font-family: var(--zh); font-size: 12px; letter-spacing: .1em; }
.fld input, .fld textarea { background: none; border: 0; outline: 0; color: inherit; font: 400 clamp(1.1rem, 1.8vw, 1.5rem)/1.4 var(--body); resize: vertical; padding: .2rem 0; }
.send { justify-self: start; display: inline-flex; gap: 1rem; align-items: center; height: 58px; padding: 0 1.8rem; border-radius: 99px; background: var(--fg); color: var(--bg); font: 700 11px/1 var(--display); letter-spacing: .2em; text-transform: uppercase; transition: transform .5s var(--out); }
.send:hover { transform: translateX(4px); }
.send:disabled { opacity: .5; cursor: progress; }
.form-status { font-size: .9rem; }

/* ---------- footer ---------- */
.ft { padding: clamp(5rem, 12vh, 9rem) 0 2rem; border-top: 1px solid var(--line); background: var(--bg); }
.ft-big { font-size: clamp(3rem, 20.5vw, 24rem); line-height: .8; letter-spacing: -.05em; color: transparent; -webkit-text-stroke: 1px var(--fg); margin-bottom: clamp(3rem, 8vh, 6rem); text-align: center; font-family: 'Syncopate', sans-serif; transition: color 1s var(--out); }
.ft-big:hover { color: var(--fg); }
.ft-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 2.4rem; margin-bottom: 4rem; }
.ft-office { display: grid; gap: .4rem; align-content: start; }
.ft-city { font: 700 1rem/1.2 var(--display); text-transform: uppercase; }
:lang(zh-Hans) .ft-city { font-family: var(--zh); font-weight: 900; font-size: 1.15rem; }
.ft-sub { font-size: .82rem; color: var(--mute); }
.ft-office a:not(.link) { font-size: .95rem; text-decoration: underline; text-underline-offset: .3em; }
.ft-row { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; font: 700 9.5px/1 var(--display); letter-spacing: .22em; color: var(--mute); padding-top: 1.4rem; border-top: 1px solid var(--line); }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
    .curtain { display: none !important; }
    .claim .w { opacity: 1 !important; }
}

/* ---------- the RESON curtain (the 1.0 idea, rebuilt): drops on leave, the mark fills with the load, lifts on arrival ---------- */
.vh { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.curtain {
    position: fixed; inset: 0; z-index: 90; background: var(--ink); color: var(--paper); display: grid; place-items: center;
    pointer-events: none; clip-path: inset(0 0 100% 0); --p: 0;
}
html.is-arriving .curtain { clip-path: inset(0); }
.curtain.is-in { clip-path: inset(0); transition: clip-path .7s var(--io); pointer-events: auto; }
.curtain.is-out { clip-path: inset(0 0 100% 0); transition: clip-path 1s cubic-bezier(.641, .16, .1, 1); } /* LaCrapule Studio SOTD, measured */
.curtain-mark { position: relative; font-family: 'Syncopate', sans-serif; font-weight: 900; letter-spacing: -0.05em; font-size: clamp(3rem, 17vw, 18rem); line-height: 1; }
.cm-o { color: transparent; -webkit-text-stroke: 1px var(--paper); display: block; }
.cm-f { position: absolute; inset: 0; color: var(--paper); clip-path: inset(0 calc(100% - var(--p) * 100%) 0 0); }
.curtain-meta { position: absolute; left: var(--gut); right: var(--gut); bottom: clamp(20px, 5vh, 48px); display: flex; justify-content: space-between; font: 700 10px/1 'Syncopate', sans-serif; letter-spacing: .3em; text-transform: uppercase; opacity: .7; font-variant-numeric: tabular-nums; }

/* ---------- tuning band: a radio dial, not a form control ---------- */
.hero { cursor: grab; touch-action: pan-y; }
.hero.is-dragging { cursor: grabbing; }
.hero.is-dragging * { user-select: none; }
.band { position: absolute; left: 50%; bottom: clamp(18px, 5vh, 52px); transform: translateX(-50%); width: min(760px, calc(100% - 2 * var(--gut))); display: grid; gap: 12px; --d: .42; }
.band-head { display: grid; grid-template-columns: auto auto 1fr auto auto; gap: .9rem; align-items: center; font: 500 11px/1 var(--body); font-variant-numeric: tabular-nums; letter-spacing: .06em; }
.band-k { font: 700 9px/1 var(--display); letter-spacing: .26em; color: var(--mute); }
:lang(zh-Hans) .band-k { font-family: var(--zh); font-size: 11px; letter-spacing: .1em; }
.band-state { justify-self: center; display: inline-flex; gap: .55rem; align-items: center; font: 700 9.5px/1 var(--display); letter-spacing: .28em; text-transform: uppercase; }
:lang(zh-Hans) .band-state { font-family: var(--zh); font-size: 12px; letter-spacing: .16em; }
.band-state i { width: 6px; height: 6px; border-radius: 50%; border: 1px solid var(--fg); transition: background .35s; }
.band.is-locked .band-state i { background: var(--fg); box-shadow: 0 0 0 4px color-mix(in srgb, var(--fg) 12%, transparent); }
.band-scale { position: relative; height: 46px; }
.band-scale:focus-within { outline: 1px solid var(--fg); outline-offset: 6px; }
.band-ticks { position: absolute; inset: 0; display: flex; justify-content: space-between; align-items: flex-end; }
.band-t { position: relative; width: 1px; height: 9px; background: var(--fg); opacity: .3; }
.band-t.is-major { height: 17px; opacity: .75; }
.band-t b { position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%); font: 700 8px/1 var(--display); letter-spacing: .08em; opacity: .9; }
.band-ref { position: absolute; left: 50%; top: 8px; bottom: 0; width: 1px; background: var(--fg); opacity: .5; transition: opacity .4s, width .4s; }
.band-needle { position: absolute; left: calc(50% + var(--d) * 50%); top: 2px; bottom: -4px; width: 1.5px; margin-left: -.75px; background: var(--fg); transition: width .4s var(--out), margin .4s var(--out); }
.band-needle::before { content: ""; position: absolute; top: -4px; left: 50%; width: 7px; height: 7px; background: var(--fg); transform: translateX(-50%) rotate(45deg); }
.band.is-locked .band-needle { width: 3px; margin-left: -1.5px; }
.band.is-locked .band-ref { opacity: 0; }
.band-input { position: absolute; inset: 0; width: 100%; opacity: 0; pointer-events: none; }
.band-foot { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.band-hint { font: 700 9px/1.4 var(--display); letter-spacing: .24em; text-transform: uppercase; color: var(--mute); }
:lang(zh-Hans) .band-hint { font-family: var(--zh); font-size: 12px; letter-spacing: .12em; }
.band-sound { display: inline-flex; gap: .5rem; align-items: center; font: 500 11px/1 var(--body); color: var(--mute); padding: .4rem 0; }
.band-sound svg { width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.4; }
.band-sound svg path:first-child { fill: currentColor; stroke: none; }
.band-sound .w { opacity: .25; transition: opacity .3s; }
.band-sound[aria-pressed="true"] { color: var(--fg); }
.band-sound[aria-pressed="true"] .w { opacity: 1; }
.hero-in { margin-bottom: clamp(120px, 16vh, 170px); }

/* ---------- the tape: a 3D journey the camera flies through ---------- */
.journey { position: relative; height: 560vh; background: var(--ink); color: var(--paper); }
.journey-pin { position: sticky; top: 0; height: 100svh; overflow: hidden; }
.journey-gl { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.journey-ui { position: relative; z-index: 2; height: 100%; padding-top: calc(var(--hd) + 3vh); pointer-events: none; }
.journey-now { position: absolute; left: var(--gut); right: var(--gut); bottom: clamp(28px, 8vh, 80px); display: grid; gap: .8rem; }
.journey-now b { font: 700 clamp(3rem, 9vw, 9rem)/.85 var(--display); letter-spacing: -.03em; }
.journey-now span { max-width: 36ch; font-size: clamp(1rem, 1.5vw, 1.3rem); opacity: .8; }
:lang(zh-Hans) .journey-now span { font-family: var(--zh); }
.journey-list { position: relative; z-index: 2; padding: 0 var(--gut) 4rem; display: grid; gap: 1rem; }
.journey-list b { font-family: var(--display); margin-right: 1rem; }
.journey.is-gl .journey-list { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.journey:not(.is-gl) { height: auto; }
.journey:not(.is-gl) .journey-pin { position: relative; height: auto; padding-bottom: 4rem; }
.journey:not(.is-gl) .journey-ui { height: auto; padding-bottom: 2rem; }

/* ---------- four doors ---------- */
.door-n { font: 700 10px/1 var(--display); letter-spacing: .26em; opacity: .55; margin-bottom: auto; }
@media (min-width: 900px) { .doors-4 .door-who { font-size: clamp(1.4rem, 2.3vw, 3.2rem); } }

/* ---------- releases: the ring ---------- */
.ring { position: relative; height: 480vh; background: var(--ink); color: var(--paper); }
.ring:not(.is-gl) { display: none; }
.ring-pin { position: sticky; top: 0; height: 100svh; overflow: hidden; }
.ring-gl { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.ring-ui { position: relative; z-index: 2; height: 100%; padding-top: calc(var(--hd) + 3vh); pointer-events: none; }
.ring-cap { position: absolute; left: var(--gut); bottom: clamp(24px, 7vh, 72px); display: grid; gap: .6rem; pointer-events: auto; }
.ring-n { font: 700 10px/1 var(--display); letter-spacing: .3em; opacity: .6; font-variant-numeric: tabular-nums; }
.ring-t { font-size: clamp(2.4rem, 6.5vw, 6.5rem); }
.ring-a { font-size: 1rem; opacity: .75; margin-bottom: .6rem; }

/* ---------- investors: the oscilloscope ---------- */
.scope { position: relative; margin: 0 0 3rem; border: 1px solid var(--line); aspect-ratio: 16 / 7; background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 25%, linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 12.5% 100%; }
.scope svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.scope path { fill: none; stroke: var(--fg); stroke-width: 1.4; vector-effect: non-scaling-stroke; stroke-dasharray: 1; stroke-dashoffset: calc(1 - var(--draw, 1)); }
.scope path:nth-child(2) { opacity: .7; } .scope path:nth-child(3) { opacity: .5; } .scope path:nth-child(4) { opacity: .32; }
.scope-keys { display: flex; flex-wrap: wrap; gap: .6rem 1.6rem; margin-top: .9rem; font: 700 9.5px/1 var(--display); letter-spacing: .18em; text-transform: uppercase; color: var(--mute); }
:lang(zh-Hans) .scope-keys { font-family: var(--zh); font-size: 12px; letter-spacing: .08em; }
.scope-keys i { display: inline-block; width: 18px; height: 1.4px; background: var(--fg); vertical-align: middle; margin-right: .5rem; }
.scope-yrs { position: absolute; left: 0; right: 0; bottom: -1.6rem; display: flex; justify-content: space-around; font: 700 9px/1 var(--display); letter-spacing: .2em; color: var(--mute); }

/* ---------- theme switch: ink spreads from the button ---------- */
::view-transition-old(root) { animation: none; }
::view-transition-new(root) { animation: theme-wave .9s cubic-bezier(.76, 0, .24, 1); }
@keyframes theme-wave { from { clip-path: circle(0 at var(--tx, 90%) var(--ty, 4%)); } to { clip-path: circle(150vmax at var(--tx, 90%) var(--ty, 4%)); } }
.send.is-sent { box-shadow: 0 0 0 0 var(--fg); animation: transmit 1.2s var(--out); }
@keyframes transmit { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--fg) 40%, transparent); } 100% { box-shadow: 0 0 0 60px transparent; } }

/* night: imagery steps down with the room */
:root[data-theme="dark"] .cv img, :root[data-theme="dark"] .ring-gl, :root[data-theme="dark"] .journey-gl { filter: brightness(.86) contrast(.96); }
:root[data-theme="dark"] .lead-img img { filter: invert(.85); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .lead-img img { filter: invert(.85); } :root:not([data-theme="light"]) .cv img { filter: brightness(.86); } }
:root[data-theme="dark"] .grain { opacity: .05; }
:root[data-theme="dark"] .journey, :root[data-theme="dark"] .ring { background: var(--night-deep); }

/* portraits: printed, on the paper itself */
.lead-img { background: transparent; aspect-ratio: 4 / 5; max-width: 420px; border-bottom: 1px solid var(--line); }
.lead-img img { filter: none; object-fit: contain; }

/* footer secondary links */
.ft-links { display: flex; flex-wrap: wrap; gap: .8rem 2rem; margin-bottom: 2rem; font: 700 10px/1 var(--display); letter-spacing: .22em; text-transform: uppercase; }
:lang(zh-Hans) .ft-links { font-family: var(--zh); font-size: 13px; letter-spacing: .1em; }
.ft-links a { opacity: .75; transition: opacity .3s; } .ft-links a:hover { opacity: 1; }
.ft-soon { color: var(--mute); }

/* language hint: suggested, never forced */
.lang-hint { position: fixed; z-index: 70; right: var(--gut); bottom: calc(18px + env(safe-area-inset-bottom, 0)); display: flex; gap: .8rem; align-items: center; padding: .7rem .8rem .7rem 1.1rem; border-radius: 99px; background: var(--fg); color: var(--bg); font: 500 13px/1 var(--body); box-shadow: 0 18px 40px -18px rgba(0,0,0,.4); animation: rise-in .7s var(--out) both; }
.lang-hint a { font-weight: 700; text-decoration: underline; text-underline-offset: .25em; }
.lang-hint button { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; opacity: .7; }
@keyframes rise-in { from { opacity: 0; transform: translateY(16px); } }

/* ---------- Harmony Piano: an instrument described like a paper ---------- */
.abstract { font: 500 clamp(1.25rem, 2.1vw, 2rem)/1.42 var(--body); max-width: 40ch; }
:lang(zh-Hans) .abstract { font-family: var(--zh); font-weight: 500; line-height: 1.7; }
.aha { display: grid; gap: .8rem; margin-top: 3rem; border-top: 1px solid var(--line); padding-top: 1.6rem; }
.aha li { display: grid; grid-template-columns: 3rem 1fr; color: var(--mute); }
.aha-n { font: 700 10px/1.8 var(--display); letter-spacing: .2em; color: var(--fg); }
.principle { font: 700 clamp(1.1rem, 1.7vw, 1.6rem)/1.2 var(--display); text-transform: uppercase; margin-bottom: 1.4rem; }
:lang(zh-Hans) .principle { font-family: var(--zh); font-weight: 900; text-transform: none; line-height: 1.4; }
.principle-note { color: var(--mute); font-size: .95rem; max-width: 38ch; }
.layers { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); border-top: 1px solid var(--line); }
.layer { padding: 1.8rem 1.6rem 2.2rem 0; border-bottom: 1px solid var(--line); }
.layer-n { display: block; font: 700 2.6rem/.9 var(--display); color: transparent; -webkit-text-stroke: 1px var(--fg); margin-bottom: 1.2rem; }
.layer-t { font: 700 1rem/1.2 var(--display); text-transform: uppercase; margin-bottom: .6rem; }
:lang(zh-Hans) .layer-t { font-family: var(--zh); font-weight: 900; font-size: 1.2rem; }
.layer p { color: var(--mute); font-size: .95rem; }
.plats { display: flex; flex-wrap: wrap; gap: .8rem; }
.plats li { padding: .9rem 1.3rem; border: 1px solid var(--line); border-radius: 99px; font: 700 10.5px/1 var(--display); letter-spacing: .16em; text-transform: uppercase; }
.refs { border-top: 1px solid var(--line); counter-reset: ref; }
.ref { display: grid; grid-template-columns: 4.2rem 1fr; gap: .3rem 1.2rem; padding: 1.1rem 0; border-bottom: 1px solid var(--line); font-size: .92rem; }
.ref-y { grid-row: span 3; font: 700 11px/1.6 var(--display); color: var(--mute); }
.ref-a { color: var(--mute); }
.ref-t { font-weight: 500; text-decoration: underline; text-decoration-color: var(--line); text-underline-offset: .25em; transition: text-decoration-color .3s; }
.ref-t:hover { text-decoration-color: currentColor; }
.ref-j { font-style: italic; color: var(--mute); font-size: .85rem; }
.ref-note { color: var(--mute); font-size: .9rem; }
/* captions over the 3D scenes always sit on a dark scrim */
.journey-pin::after, .ring-pin::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 46%; z-index: 1; pointer-events: none; background: linear-gradient(transparent, color-mix(in srgb, var(--ink) 88%, transparent) 70%); }
:root[data-theme="dark"] .journey-pin::after, :root[data-theme="dark"] .ring-pin::after { background: linear-gradient(transparent, color-mix(in srgb, var(--night-deep) 90%, transparent) 70%); }
:lang(zh-Hans) .hp-hero .phero-title { font-family: var(--display); font-weight: 700; font-size: clamp(2rem, 11.4vw, 14rem); letter-spacing: -.02em; line-height: .9; }

/* ---------- Instrument 01: the playable sketch ---------- */
.sketch { display: grid; gap: clamp(2rem, 4vw, 4rem); margin-bottom: 2.4rem; }
@media (min-width: 960px) { .sketch { grid-template-columns: 7fr 4fr; align-items: end; } }
.sketch-chord { font-size: clamp(3.4rem, 10vw, 9.5rem); line-height: .86; letter-spacing: -.03em; text-transform: none; min-height: 1em; font-feature-settings: "tnum"; }
:lang(zh-Hans) .sketch-chord { font-family: var(--display); font-weight: 700; }
.sketch-deg { display: flex; gap: 1rem; margin: 1.2rem 0 .4rem; font: 700 12px/1 var(--display); letter-spacing: .12em; opacity: .7; min-height: 1em; }
.sketch-staff svg { width: 100%; max-width: 560px; height: auto; display: block; }
.sketch-staff line { stroke: currentColor; stroke-width: 1; opacity: .55; }
.sketch-staff line.ledger { opacity: .8; }
.sketch-staff ellipse { fill: currentColor; }
.sketch-staff .clef { font-size: 38px; fill: currentColor; opacity: .8; font-family: 'Noto Music', 'Apple Symbols', 'Segoe UI Symbol', serif; }
.sketch-staff .acc { font-size: 15px; fill: currentColor; }
.sketch-staff .deg { font: 700 9px var(--display); fill: currentColor; opacity: .65; letter-spacing: .06em; }
.sketch-k { font: 700 9.5px/1 var(--display); letter-spacing: .24em; text-transform: uppercase; opacity: .6; margin-bottom: 1rem; }
:lang(zh-Hans) .sketch-k { font-family: var(--zh); font-size: 12px; letter-spacing: .1em; }
.colours { display: grid; gap: .7rem; margin-bottom: 1.4rem; }
.colour { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: 1rem 1.2rem; border: 1px solid var(--line); border-radius: 14px; text-align: left; transition: background .35s, color .35s, border-color .35s; }
.colour b { font: 700 clamp(1rem, 1.6vw, 1.35rem)/1 var(--display); }
.colour small { font: 500 11px/1 var(--body); opacity: .6; }
.colour:hover, .colour:focus-visible { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.sketch-try { display: flex; flex-wrap: wrap; gap: .6rem; }
.chip { height: 38px; padding: 0 1.1rem; border: 1px solid var(--line); border-radius: 99px; font: 700 10px/1 var(--display); letter-spacing: .14em; text-transform: uppercase; transition: border-color .3s; }
:lang(zh-Hans) .chip { font-family: var(--zh); font-size: 12px; letter-spacing: .06em; }
.chip:hover { border-color: currentColor; }
.chip-midi { margin-top: .8rem; }
.keys { position: relative; display: flex; height: clamp(120px, 18vw, 190px); user-select: none; touch-action: none; border-top: 1px solid var(--line); }
.key { flex: 1; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: transparent; position: relative; transition: background .12s; }
.key:first-child { border-left: 1px solid var(--line); }
.key-b { flex: 0 0 0; width: 0; z-index: 2; border: 0; }
.key-b::before { content: ""; position: absolute; top: 0; left: 50%; width: clamp(14px, 2.6vw, 26px); transform: translateX(-50%); height: 60%; background: var(--fg); border-radius: 0 0 3px 3px; transition: opacity .12s; }
.key.is-on:not(.key-b) { background: color-mix(in srgb, var(--fg) 22%, transparent); }
.key-b.is-on::before { opacity: .55; }
.sketch-note { margin-top: 1.2rem; font-size: .9rem; opacity: .7; }
.sketch-fine { margin-top: .6rem; font-size: .78rem; opacity: .45; max-width: 70ch; }
.play-preview.is-playing { background: var(--fg); color: var(--bg); }