:root {
  --bg: #0e1014;
  --bg-2: #14171d;
  --panel: rgba(255, 255, 255, 0.035);
  --ink: #ebe8e1;
  --mute: #9b9ca4;
  --dim: #6b6d76;
  --line: rgba(255, 255, 255, 0.09);
  --amber: #e8b86d;
  --amber-soft: rgba(232, 184, 109, 0.14);
  --cyan: #7fb7d6;
  --red: #c8504a;
  --serif: "Cormorant Garamond", "Noto Serif SC", "Songti SC", serif;
  --serif-zh: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Inter", "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: var(--amber); color: #111; }
a { color: var(--amber); text-decoration: none; transition: color .2s; }
a:hover { color: #ffe0ad; }
img { max-width: 100%; display: block; }

/* ---------- atmosphere ---------- */
#fog {
  position: fixed; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  pointer-events: none;
}
.vignette {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse at 50% 40%, transparent 35%, rgba(0, 0, 0, 0.55) 100%);
}
.grain {
  position: fixed; inset: -50%; z-index: 1; pointer-events: none; opacity: .05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
  0% { transform: translate(0, 0); } 20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -3%); } 60% { transform: translate(-2%, -1%); }
  80% { transform: translate(3%, 3%); } 100% { transform: translate(0, 0); }
}
.lightning {
  position: fixed; inset: 0; z-index: 50; pointer-events: none; opacity: 0;
  background: radial-gradient(ellipse at var(--lx, 70%) 0%, rgba(210, 225, 255, .55), rgba(150, 175, 220, .12) 55%, transparent 80%);
}
.lightning.flash { animation: flash 1.1s ease-out; }
@keyframes flash {
  0% { opacity: 0; } 4% { opacity: 1; } 9% { opacity: .15; } 14% { opacity: .85; }
  30% { opacity: .1; } 100% { opacity: 0; }
}

main, header.nav, footer { position: relative; z-index: 2; }

/* ---------- nav ---------- */
header.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px clamp(18px, 4vw, 48px);
  background: linear-gradient(to bottom, rgba(14, 16, 20, .85), rgba(14, 16, 20, 0));
  backdrop-filter: blur(6px);
  -webkit-mask-image: linear-gradient(to bottom, #000 70%, transparent);
}
.brand { font-family: var(--serif); font-size: 1.35rem; font-weight: 600; color: var(--ink); letter-spacing: .04em; }
.brand i { color: var(--amber); font-style: normal; }
nav.links { display: flex; gap: clamp(14px, 2.4vw, 30px); font-family: var(--mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
nav.links a { color: var(--mute); position: relative; padding: 4px 0; }
nav.links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: var(--amber); transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
nav.links a:hover, nav.links a.active { color: var(--ink); }
nav.links a:hover::after, nav.links a.active::after { transform: scaleX(1); }
nav.links a.blog { color: var(--amber); }

/* sound toggle */
.sound {
  display: inline-flex; align-items: center; gap: 9px; cursor: pointer;
  padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel);
  font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--mute);
  transition: color .25s, border-color .25s, background .25s;
}
.sound:hover { color: var(--ink); border-color: var(--mute); }
.sound.on { color: var(--amber); border-color: rgba(232, 184, 109, .5); background: var(--amber-soft); }
.sound .eq { display: inline-flex; align-items: flex-end; gap: 2px; height: 12px; }
.sound .eq i { display: block; width: 2px; height: 3px; border-radius: 1px; background: currentColor; transition: height .3s; }
.sound.on .eq i { animation: eq 1.3s ease-in-out infinite; }
.sound.on .eq i:nth-child(2) { animation-delay: -.4s; animation-duration: 1.7s; }
.sound.on .eq i:nth-child(3) { animation-delay: -.8s; animation-duration: 1.1s; }
.sound.on .eq i:nth-child(4) { animation-delay: -.2s; animation-duration: 1.9s; }
@keyframes eq { 0%, 100% { height: 3px; } 50% { height: 12px; } }

/* ---------- layout ---------- */
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 clamp(18px, 4vw, 40px); }
section { padding: clamp(64px, 10vw, 110px) 0 0; }
.sec-title {
  display: flex; align-items: baseline; gap: 16px; margin: 0 0 34px;
  font-family: var(--serif); font-weight: 600; font-size: clamp(2rem, 4vw, 2.7rem); letter-spacing: .01em;
}
.sec-title small { font-family: var(--mono); font-size: .72rem; color: var(--amber); letter-spacing: .2em; font-weight: 400; }
.sec-title::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); transform: translateY(-6px); }
.sec-title .aux { font-family: var(--mono); font-size: .75rem; letter-spacing: .1em; }

/* ---------- hero ---------- */
.hero { min-height: 100vh; display: flex; align-items: center; padding: 110px 0 70px; }
.hero-grid { display: grid; grid-template-columns: 1.4fr .8fr; gap: clamp(28px, 6vw, 80px); align-items: center; }
.eyebrow { font-family: var(--mono); font-size: .78rem; letter-spacing: .28em; text-transform: uppercase; color: var(--amber); margin-bottom: 18px; }
.eyebrow::before { content: ""; display: inline-block; width: 34px; height: 1px; background: var(--amber); vertical-align: middle; margin-right: 12px; }
.hero h1 {
  font-family: var(--serif); font-weight: 600; margin: 0;
  font-size: clamp(3.4rem, 9vw, 6.8rem); line-height: .98; letter-spacing: -.01em;
  background: linear-gradient(180deg, #fff 30%, #b9b5aa 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 50px rgba(232, 184, 109, .18);
}
.hero h1 .zh {
  display: block; margin-top: 14px; font-family: var(--serif-zh); font-weight: 500;
  font-size: clamp(1.2rem, 2.4vw, 1.7rem); letter-spacing: .6em; color: var(--mute);
  -webkit-text-fill-color: var(--mute);
}
.role { margin: 28px 0 0; font-family: var(--mono); font-size: clamp(.95rem, 1.6vw, 1.1rem); color: var(--cyan); min-height: 1.8em; }
.role .caret { display: inline-block; width: 9px; height: 1.05em; background: var(--cyan); margin-left: 3px; vertical-align: -3px; animation: blink 1s steps(2) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.lede { max-width: 560px; margin: 22px 0 0; color: var(--mute); font-size: 1.04rem; }
.lede b { color: var(--ink); font-weight: 500; }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border: 1px solid var(--line); border-radius: 999px;
  font-family: var(--mono); font-size: .8rem; letter-spacing: .06em; color: var(--ink);
  background: var(--panel); transition: all .25s;
}
.btn:hover { border-color: var(--amber); color: var(--amber); background: var(--amber-soft); transform: translateY(-2px); box-shadow: 0 8px 28px -10px rgba(232, 184, 109, .5); }
.btn.primary { background: var(--amber); color: #15130e; border-color: var(--amber); font-weight: 500; }
.btn.primary:hover { background: #ffd79a; color: #15130e; }

/* character-card portrait */
.portrait { position: relative; justify-self: center; width: min(100%, 340px); transform: rotate(2.5deg); transition: transform .5s cubic-bezier(.2, .7, .2, 1); }
.portrait:hover { transform: rotate(0deg) translateY(-4px); }
.portrait .frame {
  position: relative; aspect-ratio: 3 / 4; border-radius: 18px; overflow: hidden;
  border: 1px solid rgba(232, 184, 109, .5); background: #1a1d24;
  box-shadow: 0 30px 70px -25px rgba(0, 0, 0, .8), 0 0 60px -15px rgba(232, 184, 109, .35);
}
.portrait .frame img {
  width: 100%; height: 100%; object-fit: cover; object-position: center;
  filter: contrast(1.08) saturate(1.05) brightness(1.02);
  transition: transform .8s cubic-bezier(.2, .7, .2, 1);
}
.portrait:hover .frame img { transform: scale(1.04); }
.portrait .frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 40% 38%, transparent 42%, rgba(14, 16, 20, .5) 100%),
    linear-gradient(115deg, rgba(232, 184, 109, .16), transparent 45%, rgba(127, 183, 214, .14));
  mix-blend-mode: normal;
}
.portrait .corner { position: absolute; width: 22px; height: 22px; z-index: 3; border: 0 solid var(--amber); pointer-events: none; }
.portrait .corner.tl { top: -7px; left: -7px; border-top-width: 2px; border-left-width: 2px; border-top-left-radius: 8px; }
.portrait .corner.tr { top: -7px; right: -7px; border-top-width: 2px; border-right-width: 2px; border-top-right-radius: 8px; }
.portrait .corner.bl { bottom: -7px; left: -7px; border-bottom-width: 2px; border-left-width: 2px; border-bottom-left-radius: 8px; }
.portrait .corner.br { bottom: -7px; right: -7px; border-bottom-width: 2px; border-right-width: 2px; border-bottom-right-radius: 8px; }
.portrait .status {
  position: absolute; left: 14px; bottom: 14px; z-index: 4; display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px; border-radius: 999px; background: rgba(14, 16, 20, .78); backdrop-filter: blur(6px);
  border: 1px solid var(--line); font-family: var(--mono); font-size: .68rem; letter-spacing: .12em; color: var(--ink);
}
.portrait .status i { width: 7px; height: 7px; border-radius: 50%; background: #5fd38d; box-shadow: 0 0 10px #5fd38d; animation: blink 1.6s ease-in-out infinite; }
.portrait .stats { position: absolute; right: -14px; top: 22px; z-index: 4; display: grid; gap: 6px; font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; }
.portrait .stats span {
  padding: 4px 10px; background: rgba(14, 16, 20, .85); border: 1px solid var(--line); border-radius: 6px 0 0 6px; color: var(--mute);
}
.portrait .stats b { color: var(--amber); font-weight: 500; margin-left: 6px; }
.portrait .cap { margin-top: 26px; text-align: center; font-family: var(--mono); font-size: .72rem; letter-spacing: .22em; color: var(--dim); text-transform: uppercase; }
.scroll-hint { position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%); font-family: var(--mono); font-size: .68rem; letter-spacing: .3em; color: var(--dim); text-transform: uppercase; }
.scroll-hint::after { content: ""; display: block; width: 1px; height: 38px; margin: 10px auto 0; background: linear-gradient(var(--amber), transparent); animation: drip 2s ease-in-out infinite; }
@keyframes drip { 0% { transform: scaleY(0); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } 51% { transform-origin: bottom; } 100% { transform: scaleY(0); transform-origin: bottom; } }

/* ---------- about / path ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 5vw, 64px); }
.about-text p { margin: 0 0 1.1em; color: #c9c6be; font-size: 1.04rem; }
.about-text a { border-bottom: 1px solid rgba(232, 184, 109, .35); }
.focus { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { padding: 5px 13px; border: 1px solid var(--line); border-radius: 999px; font-family: var(--mono); font-size: .74rem; color: var(--mute); background: var(--panel); }

.track-label {
  margin: 0 0 16px; font-family: var(--mono); font-size: .72rem; letter-spacing: .24em; text-transform: uppercase; color: var(--dim);
  display: flex; align-items: center; gap: 12px;
}
.track-label::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.track-label small { font-size: .66rem; letter-spacing: .12em; color: var(--amber); text-transform: none; opacity: .8; }
.timeline + .track-label { margin-top: 14px; }
.timeline { position: relative; margin: 0; padding: 0 0 0 26px; list-style: none; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 1px; background: linear-gradient(var(--amber), var(--line) 30%, var(--line)); }
.timeline li { position: relative; padding: 0 0 26px; }
.timeline li::before {
  content: ""; position: absolute; left: -26px; top: 8px; width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 1px solid var(--dim); transition: all .3s;
}
.timeline li.now::before { background: var(--amber); border-color: var(--amber); box-shadow: 0 0 0 5px var(--amber-soft), 0 0 18px var(--amber); }
.timeline li:hover::before { border-color: var(--amber); }
.timeline .when { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; color: var(--amber); }
.timeline .what { font-family: var(--serif); font-size: 1.32rem; font-weight: 600; line-height: 1.3; margin: 2px 0; }
.timeline .sub { color: var(--mute); font-size: .92rem; }
.timeline .sub a { color: #cbb890; }

/* ---------- research ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: -8px 0 28px; }
.filters button {
  cursor: pointer; padding: 6px 15px; border-radius: 999px; border: 1px solid var(--line); background: transparent;
  color: var(--mute); font-family: var(--mono); font-size: .76rem; letter-spacing: .08em; transition: all .2s;
}
.filters button:hover { color: var(--ink); border-color: var(--mute); }
.filters button.on { color: #15130e; background: var(--amber); border-color: var(--amber); }

.papers { display: grid; gap: 18px; }
.paper {
  --mx: 50%; --my: 50%;
  position: relative; display: grid; grid-template-columns: 250px 1fr; gap: 26px; padding: 18px;
  border: 1px solid var(--line); border-radius: 16px; background: var(--panel); overflow: hidden;
  transition: border-color .3s, transform .3s, opacity .4s;
}
.paper::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0; transition: opacity .3s;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(232, 184, 109, .13), transparent 45%);
}
.paper:hover { border-color: rgba(232, 184, 109, .4); transform: translateY(-3px); }
.paper:hover::before { opacity: 1; }
.paper.hide { display: none; }
.thumb {
  position: relative; border-radius: 10px; overflow: hidden; background: #ece8de;
  display: flex; align-items: center; justify-content: center; min-height: 140px;
}
.thumb img { width: 100%; height: 100%; object-fit: contain; filter: brightness(.94) contrast(1.02); transition: transform .6s, filter .4s; }
.paper:hover .thumb img { transform: scale(1.04); filter: brightness(1); }
.thumb.ph {
  background: radial-gradient(circle at 30% 20%, rgba(232, 184, 109, .35), transparent 55%), radial-gradient(circle at 80% 90%, rgba(127, 183, 214, .3), transparent 55%), #161a22;
  font-family: var(--serif); font-size: 2.6rem; color: rgba(255, 255, 255, .85); letter-spacing: .08em;
}
.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 6px; font-family: var(--mono); font-size: .72rem; letter-spacing: .08em; }
.venue { color: var(--amber); text-transform: uppercase; }
.tag { padding: 1px 9px; border: 1px solid var(--line); border-radius: 999px; color: var(--dim); }
.badge { padding: 1px 9px; border-radius: 999px; background: var(--red); color: #fff; letter-spacing: .12em; animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(200, 80, 74, .55); } 50% { box-shadow: 0 0 0 7px rgba(200, 80, 74, 0); } }
.paper h3 { margin: 0 0 6px; font-family: var(--serif); font-weight: 600; font-size: 1.38rem; line-height: 1.28; }
.authors { margin: 0 0 8px; color: var(--mute); font-size: .88rem; line-height: 1.55; }
.authors b { color: var(--ink); font-weight: 600; }
.blurb { margin: 0 0 12px; color: #bdbab2; font-size: .93rem; font-style: italic; }
.plinks { display: flex; flex-wrap: wrap; gap: 8px; }
.plinks a {
  padding: 3px 12px; border: 1px solid var(--line); border-radius: 6px;
  font-family: var(--mono); font-size: .74rem; letter-spacing: .06em; color: var(--ink); transition: all .2s;
}
.plinks a:hover { border-color: var(--amber); color: var(--amber); background: var(--amber-soft); }

/* ---------- co-authored (auto-rotating deck) ---------- */
.co-block { margin-top: 56px; }
.co-title {
  display: flex; align-items: center; gap: 14px; margin: 0 0 16px;
  font-family: var(--mono); font-size: .76rem; font-weight: 400; letter-spacing: .24em; text-transform: uppercase; color: var(--dim);
}
.co-title small { font-size: .68rem; letter-spacing: .1em; color: var(--amber); text-transform: none; }
.co-title::after { content: ""; flex: 1; height: 1px; background: var(--line); order: 2; }
.co-title small { order: 1; }

.co-deck { display: grid; grid-template-columns: 250px 1fr; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); overflow: hidden; }
.co-tabs { display: flex; flex-direction: column; border-right: 1px solid var(--line); max-height: 330px; overflow-y: auto; scrollbar-width: none; }
.co-tabs::-webkit-scrollbar { display: none; }
.co-tab {
  position: relative; display: block; width: 100%; text-align: left; cursor: pointer;
  padding: 10px 16px 10px 18px; border: 0; border-bottom: 1px solid var(--line); background: transparent; color: var(--mute);
  font-family: var(--sans); transition: background .25s, color .25s;
}
.co-tab:last-child { border-bottom: 0; }
.co-tab::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--amber); transform: scaleY(0); transition: transform .3s; }
.co-tab .v { display: block; font-family: var(--mono); font-size: .66rem; letter-spacing: .1em; color: var(--dim); text-transform: uppercase; }
.co-tab .n { display: block; font-size: .86rem; line-height: 1.3; margin-top: 1px; }
.co-tab:hover { background: rgba(255, 255, 255, .03); color: var(--ink); }
.co-tab.on { background: var(--amber-soft); color: var(--ink); }
.co-tab.on::before { transform: scaleY(1); }
.co-tab.on .v { color: var(--amber); }
.co-tab.hide { display: none; }

.co-stage { position: relative; min-height: 270px; padding: 28px 32px 30px; overflow: hidden; }
.co-bar { position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--line); }
.co-bar i { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, var(--amber), transparent); transform-origin: left; transform: scaleX(0); }
.co-bar i.run { animation: coRun var(--dur, 5.5s) linear forwards; }
@keyframes coRun { from { transform: scaleX(0); } to { transform: scaleX(1); } }

.co-card { position: absolute; left: 32px; right: 32px; top: 28px; opacity: 0; transform: translateY(14px); pointer-events: none; transition: opacity .45s ease, transform .45s ease; }
.co-card.on { position: relative; left: auto; right: auto; top: auto; opacity: 1; transform: none; pointer-events: auto; }
.co-card .co-venue { margin-bottom: 8px; }
.co-card h4 { margin: 0 0 10px; font-family: var(--serif); font-weight: 600; font-size: clamp(1.25rem, 2.3vw, 1.6rem); line-height: 1.3; color: var(--ink); }
.co-card .co-authors { margin: 0 0 18px; color: var(--mute); font-size: .9rem; line-height: 1.6; }
.co-venue { font-family: var(--mono); font-size: .74rem; letter-spacing: .1em; color: var(--amber); text-transform: uppercase; }
.co-authors b { color: var(--ink); font-weight: 600; }

/* ---------- awards ---------- */
.awards { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.awards li { display: grid; grid-template-columns: 110px 1fr; gap: 18px; padding: 15px 4px; border-bottom: 1px solid var(--line); transition: background .25s, padding .25s; }
.awards li:hover { background: linear-gradient(90deg, var(--amber-soft), transparent); padding-left: 14px; }
.awards .yr { font-family: var(--mono); font-size: .8rem; color: var(--amber); padding-top: 3px; }
.awards .t { color: #d3d0c8; }
.awards .t small { display: block; color: var(--dim); font-size: .84rem; }

/* ---------- footer ---------- */
footer { margin-top: clamp(80px, 12vw, 140px); padding: 0 0 60px; text-align: center; }
.epi { max-width: 640px; margin: 0 auto; font-family: var(--serif); font-style: italic; font-size: clamp(1.15rem, 2.2vw, 1.45rem); line-height: 1.6; color: #c4c0b6; }
.epi::before { content: "\201C"; display: block; font-size: 4rem; line-height: .6; color: var(--amber); opacity: .5; margin-bottom: 8px; }
.epi cite { display: block; margin-top: 14px; font-family: var(--mono); font-style: normal; font-size: .76rem; letter-spacing: .14em; color: var(--dim); }
.epi cite a { color: var(--mute); }
.foot-meta { margin-top: 56px; font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; color: var(--dim); }
.map { margin-top: 20px; display: flex; justify-content: center; opacity: .85; }

/* ---------- reveal ---------- */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2, .7, .2, 1), transform .8s cubic-bezier(.2, .7, .2, 1); }
.js .reveal.in { opacity: 1; transform: none; }
.js .paper.reveal.in { transition: opacity .8s, transform .3s, border-color .3s; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  nav.links a:not(.blog) { display: none; }
  .sound .lbl { display: none; }
  .sound { padding: 6px 10px; }
  .hero-grid, .about-grid { grid-template-columns: 1fr; }
  .portrait { order: -1; width: 230px; margin-right: 14px; }
  .hero { padding-top: 96px; }
  .paper { grid-template-columns: 1fr; }
  .thumb { max-height: 220px; }
  .awards li { grid-template-columns: 1fr; gap: 2px; }
  .co-deck { grid-template-columns: 1fr; }
  .co-tabs { flex-direction: row; max-height: none; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); }
  .co-tab { width: auto; flex: 0 0 auto; min-width: 128px; border-bottom: 0; border-right: 1px solid var(--line); }
  .co-tab::before { top: auto; left: 0; right: 0; bottom: 0; width: auto; height: 2px; transform: scaleX(0); }
  .co-tab.on::before { transform: scaleX(1); }
  .co-stage { padding: 22px 20px 24px; min-height: 300px; }
  .co-card { left: 20px; right: 20px; top: 22px; }
  .scroll-hint { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}