/* ==========================================================================
   Yuyang Peng — homepage
   ========================================================================== */

:root {
  --bg: #f6f5f1;
  --bg-2: #ecebe5;
  --card: #ffffff;
  --ink: #15161c;
  --ink-2: #4a4d5a;
  --ink-3: #8a8d99;
  --line: rgba(21, 22, 28, .09);
  --accent: #4f46e5;
  --accent-2: #ec4899;
  --accent-3: #0ea5a4;
  --accent-soft: rgba(79, 70, 229, .09);
  --grad: linear-gradient(110deg, #4f46e5 0%, #9333ea 45%, #ec4899 100%);
  --shadow: 0 1px 2px rgba(20, 20, 40, .04), 0 12px 32px -18px rgba(20, 20, 40, .25);
  --shadow-lg: 0 2px 6px rgba(20, 20, 40, .05), 0 30px 60px -28px rgba(79, 70, 229, .45);
  --net: 79, 70, 229;
  --screen: #fbfbfd;
  --radius: 18px;
  --font: "Inter", -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Space Grotesk", "Inter", "PingFang SC", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c11;
    --bg-2: #13141b;
    --card: #15161e;
    --ink: #eceef5;
    --ink-2: #b3b6c4;
    --ink-3: #7b7f8f;
    --line: rgba(255, 255, 255, .08);
    --accent: #8b85ff;
    --accent-2: #f472b6;
    --accent-3: #2dd4bf;
    --accent-soft: rgba(139, 133, 255, .13);
    --grad: linear-gradient(110deg, #8b85ff 0%, #c084fc 45%, #f472b6 100%);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -18px rgba(0, 0, 0, .7);
    --shadow-lg: 0 2px 6px rgba(0, 0, 0, .3), 0 30px 60px -28px rgba(139, 133, 255, .45);
    --net: 139, 133, 255;
    --screen: #1b1c26;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0b0c11;
  --bg-2: #13141b;
  --card: #15161e;
  --ink: #eceef5;
  --ink-2: #b3b6c4;
  --ink-3: #7b7f8f;
  --line: rgba(255, 255, 255, .08);
  --accent: #8b85ff;
  --accent-2: #f472b6;
  --accent-3: #2dd4bf;
  --accent-soft: rgba(139, 133, 255, .13);
  --grad: linear-gradient(110deg, #8b85ff 0%, #c084fc 45%, #f472b6 100%);
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -18px rgba(0, 0, 0, .7);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, .3), 0 30px 60px -28px rgba(139, 133, 255, .45);
  --net: 139, 133, 255;
  --screen: #1b1c26;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .4s ease, color .4s ease;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }
::selection { background: var(--accent); color: #fff; }

/* ---------- background network + progress ---------- */

#net {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 60;
}
.progress span {
  display: block;
  height: 100%;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: var(--grad);
}

main, .footer { position: relative; z-index: 1; }

/* ---------- nav ---------- */

.nav {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 6px 6px 18px;
  width: max-content;
  max-width: calc(100% - 32px);
  background: color-mix(in srgb, var(--card) 72%, transparent);
  backdrop-filter: saturate(170%) blur(14px);
  -webkit-backdrop-filter: saturate(170%) blur(14px);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
}
.nav__brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
  margin-right: 10px;
  letter-spacing: -.02em;
}
.nav__brand span { color: var(--accent-2); }
.nav__links { display: flex; gap: 2px; }
.nav__links a {
  position: relative;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--ink-2);
  transition: color .2s, background-color .2s;
}
.nav__links a:hover { color: var(--ink); background: var(--accent-soft); }
.nav__links a.is-active { color: #fff; background: var(--ink); }
:root[data-theme="dark"] .nav__links a.is-active { color: var(--bg); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav__links a.is-active { color: var(--bg); }
}
.nav__lang {
  display: grid;
  place-items: center;
  min-width: 36px; height: 36px;
  padding: 0 8px;
  margin-left: 4px;
  font: 600 .82rem/1 var(--font);
  color: var(--ink);
  background: var(--accent-soft);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: background-color .2s, color .2s;
}
.nav__lang:hover { color: #fff; background: var(--accent); }

.nav__theme {
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  margin-left: 4px;
  border: 0;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--ink);
  cursor: pointer;
  transition: transform .3s ease;
}
.nav__theme:hover { transform: rotate(25deg); }
.nav__theme .i-moon { display: none; }
:root[data-theme="dark"] .nav__theme .i-sun { display: none; }
:root[data-theme="dark"] .nav__theme .i-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav__theme .i-sun { display: none; }
  :root:not([data-theme="light"]) .nav__theme .i-moon { display: block; }
}

/* ---------- shared ---------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 5px 12px 5px 10px;
  font-size: .82rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: left;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
}
.eyebrow .dot { flex: none; }
.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 0 rgba(34, 197, 94, .6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(34, 197, 94, .55); }
  70% { box-shadow: 0 0 0 8px rgba(34, 197, 94, 0); }
  100% { box-shadow: 0 0 0 0 rgba(34, 197, 94, 0); }
}

.callout {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 540px;
  margin: 0 0 26px;
  padding: 12px 16px;
  font-size: .92rem;
  line-height: 1.5;
  color: var(--ink-2);
  background: var(--card);
  border-radius: 16px;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.callout::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  pointer-events: none;
}
.callout .dot { flex: none; }
.callout strong { color: var(--ink); font-weight: 600; }
.callout__go {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  color: #fff;
  font-weight: 700;
  background: var(--grad);
  border-radius: 50%;
  transition: transform .25s ease;
}
.callout:hover { color: var(--ink-2); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.callout:hover .callout__go { transform: translateX(3px); }

.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-weight: 600;
  font-size: .95rem;
  border-radius: 999px;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s;
}
.btn--primary { color: #fff; background: var(--ink); }
.btn--primary:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
:root[data-theme="dark"] .btn--primary, :root[data-theme="dark"] .btn--primary:hover { color: var(--bg); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn--primary,
  :root:not([data-theme="light"]) .btn--primary:hover { color: var(--bg); }
}
.btn--ghost { color: var(--ink); border: 1px solid var(--line); background: var(--card); }
.btn--ghost:hover { color: var(--ink); transform: translateY(-2px); border-color: var(--accent); }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 56px;
  align-items: center;
}
.hero__name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(2.8rem, 6.4vw, 5.2rem);
  line-height: 1;
  letter-spacing: -.035em;
  margin: 0 0 22px;
}
.hero__cn {
  display: block;
  margin-top: 12px;
  font-family: var(--font);
  font-size: .32em;
  font-weight: 500;
  letter-spacing: .35em;
  color: var(--ink-3);
}
.hero__tagline {
  font-family: var(--display);
  font-size: clamp(1.35rem, 2.4vw, 1.9rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -.01em;
  margin: 0 0 18px;
  min-height: 2.6em;
}
.typer {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.caret {
  display: inline-block;
  width: 3px;
  height: 1em;
  margin-left: 3px;
  vertical-align: -.12em;
  background: var(--accent-2);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero__sub { color: var(--ink-2); max-width: 520px; margin: 0 0 30px; }
.hero__sub strong { color: var(--ink); font-weight: 600; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.hero__social { display: flex; gap: 10px; list-style: none; margin: 0; padding: 0; }
.hero__social a {
  display: grid; place-items: center;
  width: 42px; height: 42px;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  transition: transform .2s, color .2s, border-color .2s;
}
.hero__social a:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-3px); }

/* ---------- agent window ---------- */

.agent {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  overflow: clip;
  transform: perspective(1200px) rotateY(-6deg) rotateX(3deg);
  transition: transform .6s cubic-bezier(.2,.7,.2,1);
}
.agent:hover { transform: perspective(1200px) rotateY(0) rotateX(0); }
.agent::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: var(--grad);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: .55;
  pointer-events: none;
}
.agent__bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}
.agent__dots { display: flex; gap: 6px; }
.agent__dots i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.agent__dots i:nth-child(2) { background: #febc2e; }
.agent__dots i:nth-child(3) { background: #28c840; }
.agent__title { font-family: var(--mono); font-size: .78rem; color: var(--ink-3); }

.agent__screen {
  position: relative;
  padding: 18px;
  background: var(--screen);
}
.agent__search {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: .82rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .2s, box-shadow .2s;
}
.agent__search svg { color: var(--ink-3); flex: none; }
.agent__search.is-focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.agent__qcaret { width: 1.5px; height: 14px; background: var(--accent); opacity: 0; }
.agent__search.is-focus .agent__qcaret { opacity: 1; animation: blink 1s steps(1) infinite; }

.agent__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px;
  min-height: 104px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  overflow: clip;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.tile::after {
  content: "";
  position: absolute;
  right: -30px; bottom: -30px;
  width: 90px; height: 90px;
  border-radius: 50%;
  opacity: .16;
  transition: transform .4s ease;
}
.tile--pub::after { background: #4f46e5; }
.tile--res::after { background: #0ea5a4; }
.tile--hon::after { background: #f59e0b; }
.tile--con::after { background: #ec4899; }
.tile:hover, .tile.is-hover { color: var(--ink); transform: translateY(-3px); border-color: var(--accent); box-shadow: var(--shadow); }
.tile:hover::after, .tile.is-hover::after { transform: scale(1.5); }
.tile.is-press { transform: scale(.96); }
.tile__icon { font-size: 1.35rem; margin-bottom: 6px; }
.tile__label { font-weight: 600; font-size: .95rem; }
.tile__meta { font-size: .78rem; color: var(--ink-3); }

.agent__cursor {
  position: absolute;
  top: 0; left: 0;
  z-index: 3;
  pointer-events: none;
  transform: translate(60%, 160%);
  transition: transform .9s cubic-bezier(.65, 0, .25, 1);
  filter: drop-shadow(0 3px 4px rgba(0, 0, 0, .25));
}
.ripple {
  position: absolute;
  z-index: 2;
  width: 14px; height: 14px;
  margin: -7px 0 0 -7px;
  border-radius: 50%;
  border: 2px solid var(--accent-2);
  pointer-events: none;
  animation: ripple .6s ease-out forwards;
}
@keyframes ripple { to { transform: scale(4); opacity: 0; } }

.agent__log {
  height: 118px;
  padding: 12px 16px;
  overflow: hidden;
  overflow: clip;
  font-family: var(--mono);
  font-size: .76rem;
  line-height: 1.75;
  color: var(--ink-2);
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.agent__log div { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; animation: logIn .3s ease; }
.agent__log .k-think { color: var(--ink-3); }
.agent__log .k-act { color: var(--accent); }
.agent__log .k-act b { color: var(--accent-2); font-weight: 500; }
.agent__log .k-obs { color: var(--accent-3); }
@keyframes logIn { from { opacity: 0; transform: translateY(6px); } }

/* ---------- sections ---------- */

.section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 90px 24px;
}
.section__head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 44px;
}
.section__head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 2.9rem);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
}
.section__num {
  font-family: var(--mono);
  font-size: .85rem;
  font-weight: 500;
  color: var(--accent);
  padding: 3px 9px;
  border: 1px solid var(--accent);
  border-radius: 999px;
}

/* ---------- about ---------- */

.about {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 56px;
  align-items: start;
}
.about__ring {
  position: relative;
  padding: 5px;
  border-radius: 28px;
  background: var(--grad);
  background-size: 200% 200%;
  animation: shift 8s ease infinite;
  box-shadow: var(--shadow-lg);
  transform: rotate(-3deg);
  transition: transform .5s ease;
}
.about__ring:hover { transform: rotate(0); }
.about__ring picture { display: block; }
.about__ring img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 24px; }
@keyframes shift { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.about__loc { margin-top: 18px; text-align: center; font-size: .9rem; color: var(--ink-3); }

.lead { font-size: 1.22rem; line-height: 1.6; color: var(--ink); margin-top: 0; }
.lead em { font-style: normal; font-weight: 600; background: linear-gradient(transparent 60%, var(--accent-soft) 60%); }
.about__body > p { color: var(--ink-2); }
.about__body strong { color: var(--ink); }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 26px 0 34px; }
.chip {
  padding: 6px 14px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: transform .2s, border-color .2s, color .2s;
}
.chip:hover { transform: translateY(-2px); border-color: var(--accent); color: var(--accent); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.stat {
  padding: 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
}
.stat__n {
  display: block;
  font-family: var(--display);
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat__l { display: block; margin-top: 8px; font-size: .8rem; line-height: 1.35; color: var(--ink-3); }

/* ---------- timeline ---------- */

.timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 44px;
}
.timeline::before, .timeline__fill {
  content: "";
  position: absolute;
  left: 11px; top: 8px; bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: var(--line);
}
.timeline__fill {
  background: var(--grad);
  transform-origin: 50% 0;
  transform: scaleY(0);
}
.tl { position: relative; margin-bottom: 26px; }
.tl:last-child { margin-bottom: 0; }
.tl__node {
  position: absolute;
  left: -44px; top: 22px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg);
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 5px var(--bg);
}
.tl__node::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--grad);
  transform: scale(0);
  transition: transform .5s cubic-bezier(.3,1.6,.5,1) .2s;
}
.tl.is-in .tl__node::after { transform: scale(1); }
.tl--now .tl__node { animation: nodeGlow 2.2s infinite; }
@keyframes nodeGlow {
  0%, 100% { box-shadow: 0 0 0 5px var(--bg), 0 0 0 5px rgba(236, 72, 153, .0); }
  50% { box-shadow: 0 0 0 5px var(--bg), 0 0 0 12px rgba(236, 72, 153, .22); }
}
.tl__card {
  padding: 22px 26px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform .3s ease, border-color .3s ease;
}
.tl__card:hover { transform: translateX(6px); border-color: var(--accent); }
.tl__top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.tl__date { font-family: var(--mono); font-size: .8rem; color: var(--ink-3); }
.tag {
  padding: 3px 10px;
  font-size: .75rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
}
.tag--live { color: #db2777; background: rgba(236, 72, 153, .12); }
.tl__card h3 { margin: 10px 0 2px; font-family: var(--display); font-size: 1.35rem; letter-spacing: -.015em; }
.tl__org { margin: 0; font-size: .92rem; color: var(--ink-2); }
.tl__card ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-2); font-size: .94rem; }
.tl__card li { margin-bottom: 4px; }
.tl__card li::marker { color: var(--accent); }
.tl__card--edu { background: transparent; box-shadow: none; border-style: dashed; }

/* ---------- publications ---------- */

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 10px; }
.filter {
  padding: 8px 16px;
  font: inherit;
  font-size: .88rem;
  font-weight: 500;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: all .2s ease;
}
.filter:hover { color: var(--ink); border-color: var(--accent); }
.filter.is-active { color: #fff; background: var(--accent); border-color: var(--accent); }
.pubs__note { margin: 0 0 22px; font-size: .8rem; color: var(--ink-3); }

.pubs { display: grid; gap: 20px; }
.pub {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 28px;
  align-items: center;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  transition: box-shadow .3s ease, border-color .3s ease, opacity .5s ease;
}
.pub.reveal { transition: opacity .8s cubic-bezier(.2,.7,.2,1), transform .8s cubic-bezier(.2,.7,.2,1), box-shadow .3s ease, border-color .3s ease; }
.pub.is-in.is-tilting { transition: box-shadow .3s ease, border-color .3s ease, transform .12s linear; }
.pub:hover { box-shadow: var(--shadow-lg); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.pub.is-hidden { display: none; }
.pub__img {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  overflow: clip;
  background: #fff;
  border: 1px solid var(--line);
}
.pub__img picture { display: contents; }
.pub__img img { width: 100%; height: 100%; object-fit: contain; transition: transform .6s cubic-bezier(.2,.7,.2,1); }
.pub:hover .pub__img img { transform: scale(1.05); }
.pub__img--logo img { object-fit: contain; padding: 14px; }
.venue {
  position: absolute;
  top: 10px; left: 10px;
  padding: 4px 10px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: #fff;
  border-radius: 999px;
  box-shadow: 0 4px 12px -4px rgba(0, 0, 0, .35);
}
.venue--kdd { background: linear-gradient(110deg, #4f46e5, #7c3aed); }
.venue--neurips { background: linear-gradient(110deg, #7c3aed, #db2777); }
.venue--acl { background: linear-gradient(110deg, #dc2626, #f97316); }
.venue--oss { background: linear-gradient(110deg, #0f766e, #0ea5a4); }
.venue--cvpr { background: linear-gradient(110deg, #1d4ed8, #0ea5e9); }
.pub__body h3 {
  margin: 0 0 10px;
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.015em;
}
.pub__authors { margin: 0 0 16px; font-size: .92rem; color: var(--ink-2); }
.pub__authors b { color: var(--ink); font-weight: 700; background: linear-gradient(transparent 62%, var(--accent-soft) 62%); }
.pub__links { display: flex; flex-wrap: wrap; gap: 8px; }
.pub__links a {
  padding: 6px 14px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: all .2s ease;
}
.pub__links a:hover { color: #fff; background: var(--accent); border-color: var(--accent); }

.pub__also {
  margin: 14px 0 0;
  padding-top: 12px;
  font-size: .84rem;
  color: var(--ink-3);
  border-top: 1px dashed var(--line);
}
.pub__also b { color: var(--ink-2); font-weight: 600; }
.pub__also i { color: var(--ink-2); }
.pub__also a { font-weight: 600; }

/* ---------- honors ---------- */

.honors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.honor {
  position: relative;
  padding: 24px 22px 22px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  overflow: clip;
  transition: transform .3s ease;
}
.honor:hover { transform: translateY(-6px) rotate(-1deg); }
.honor::before {
  content: "";
  position: absolute;
  top: -60px; right: -60px;
  width: 140px; height: 140px;
  border-radius: 50%;
  background: var(--m);
  opacity: .14;
}
.honor--elite { --m: linear-gradient(135deg, #6366f1, #ec4899); }
.honor--gold { --m: linear-gradient(135deg, #fde68a, #d97706); }
.honor--silver { --m: linear-gradient(135deg, #f1f5f9, #94a3b8); }
.honor--bronze { --m: linear-gradient(135deg, #fed7aa, #b45309); }
.honor__medal {
  display: grid; place-items: center;
  width: 48px; height: 48px;
  margin-bottom: 18px;
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  border-radius: 50%;
  background: var(--m);
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, .15), 0 8px 18px -8px rgba(0, 0, 0, .4);
  text-shadow: 0 1px 1px rgba(0, 0, 0, .25);
}
.honor:hover .honor__medal { animation: spin 1s cubic-bezier(.3,1.4,.5,1); }
@keyframes spin { from { transform: rotateY(0); } to { transform: rotateY(360deg); } }
.honor__year { position: absolute; top: 24px; right: 22px; font-family: var(--mono); font-size: .8rem; color: var(--ink-3); }
.honor h3 { margin: 0 0 4px; font-family: var(--display); font-size: 1.15rem; line-height: 1.25; }
.honor p { margin: 0; font-size: .88rem; color: var(--ink-2); }

/* ---------- music ---------- */

.music {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 64px;
  align-items: center;
  padding: 40px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
  overflow: hidden;
  overflow: clip;
}
.music__art {
  position: relative;
  display: block;
  width: 100%;
  max-width: 280px;
  aspect-ratio: 1 / 1;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}
.music__cover {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
  box-shadow: 0 24px 40px -18px rgba(0, 0, 0, .55);
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.music__play {
  position: absolute;
  z-index: 3;
  left: 14px; bottom: 14px;
  display: grid;
  place-items: center;
  width: 52px; height: 52px;
  color: #fff;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 10px 24px -8px rgba(0, 0, 0, .6);
  transition: transform .25s ease;
}
.music__art:hover .music__play { transform: scale(1.08); }
.music__play .i-pause { display: none; }
.music.is-playing .music__play .i-play { display: none; }
.music.is-playing .music__play .i-pause { display: block; }
.vinyl {
  position: absolute;
  z-index: 1;
  top: 4%; left: 4%;
  width: 92%; height: 92%;
  border-radius: 50%;
  background:
    radial-gradient(circle, #d6284b 0 17%, #1a1a1a 17.5% 19%, transparent 19.5%),
    repeating-radial-gradient(circle, #111 0 2px, #1d1d1f 2px 4px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, .6);
  transform: translateX(22%);
  transition: transform .8s cubic-bezier(.2,.7,.2,1);
}
.vinyl span {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 30deg, transparent 0 20%, rgba(255,255,255,.10) 25%, transparent 32% 70%, rgba(255,255,255,.07) 75%, transparent 82%);
  animation: spinDisc 3.2s linear infinite;
  animation-play-state: paused;
}
@keyframes spinDisc { to { transform: rotate(360deg); } }
.music:hover .vinyl { transform: translateX(30%); }
.music.is-playing .vinyl { transform: translateX(46%); }
.music.is-playing .vinyl span { animation-play-state: running; }
.music.is-playing .music__cover { transform: rotate(-3deg) translateX(-6px); }

.music__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--ink-3);
}
.music.is-playing .music__kicker { color: var(--accent-2); }
.eq { display: inline-flex; align-items: flex-end; gap: 2px; height: 14px; }
.eq i { width: 3px; height: 100%; border-radius: 2px; background: var(--ink-3); transform: scaleY(.3); transform-origin: bottom; animation: eq 1s ease-in-out infinite; animation-play-state: paused; }
.eq i:nth-child(2) { animation-delay: -.3s; }
.eq i:nth-child(3) { animation-delay: -.6s; }
.eq i:nth-child(4) { animation-delay: -.15s; }
.music.is-playing .eq i { background: var(--accent-2); animation-play-state: running; }
@keyframes eq { 0%, 100% { transform: scaleY(.3); } 50% { transform: scaleY(1); } }
.music__body h3 {
  margin: 0 0 12px;
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.15;
  letter-spacing: -.025em;
}
.music__text { margin: 0 0 20px; color: var(--ink-2); }

.playlist { list-style: none; margin: 0 0 8px; padding: 0; }
.playlist li {
  position: relative;
  display: flex;
  align-items: center;
  border-radius: 12px;
  overflow: hidden;
  overflow: clip;
  transition: background-color .2s ease;
}
.playlist li + li { border-top: 1px solid var(--line); }
.playlist li:hover, .playlist li.is-current { background: var(--accent-soft); }
.playlist__btn {
  flex: 1;
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 8px 12px 14px;
  font: inherit;
  text-align: left;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
.playlist__n, .playlist__icon { grid-column: 1; grid-row: 1; font-family: var(--mono); font-size: .8rem; color: var(--ink-3); }
.playlist__icon { display: none; width: 14px; height: 14px; }
.playlist__icon::before {
  content: "";
  display: block;
  width: 0; height: 0;
  margin: 1px 0 0 2px;
  border-style: solid;
  border-width: 6px 0 6px 10px;
  border-color: transparent transparent transparent var(--accent);
}
.playlist li:hover .playlist__n, .playlist li.is-current .playlist__n { display: none; }
.playlist li:hover .playlist__icon, .playlist li.is-current .playlist__icon { display: block; }
.playlist li.is-current.is-playing .playlist__icon::before {
  width: 10px; height: 12px;
  margin: 1px 0 0 2px;
  border: 0;
  border-left: 3px solid var(--accent-2);
  border-right: 3px solid var(--accent-2);
}
.playlist__t { font-weight: 600; font-size: 1.05rem; color: var(--ink); }
.playlist li.is-current .playlist__t { color: var(--accent); }
.playlist__a { font-size: .82rem; color: var(--ink-3); }
.playlist__ext {
  flex: none;
  display: grid;
  place-items: center;
  width: 32px; height: 32px;
  margin-right: 8px;
  font-size: .95rem;
  color: var(--ink-3);
  border-radius: 50%;
  transition: background-color .2s, color .2s;
}
.playlist__ext:hover { color: #fff; background: var(--accent); }
.playlist__bar {
  position: absolute;
  left: 0; bottom: 0;
  height: 2px;
  width: 100%;
  transform-origin: 0 50%;
  transform: scaleX(var(--p, 0));
  background: var(--grad);
}
.music__note { margin: 0 0 22px; font-size: .78rem; color: var(--ink-3); }

.music__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  font-weight: 600;
  font-size: .92rem;
  line-height: 1.4;
  color: #fff;
  background: var(--grad);
  border-radius: 22px;
  transition: transform .2s ease, box-shadow .2s ease;
}
.music__cta span { flex: none; }
.music__cta:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.music__cta span { transition: transform .2s ease; }
.music__cta:hover span { transform: translateX(4px); }

/* ---------- contact ---------- */

.contact { padding-bottom: 120px; }
.contact__inner {
  position: relative;
  padding: 64px 48px;
  text-align: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 32px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  overflow: clip;
}
.contact__inner::before {
  content: "";
  position: absolute;
  inset: auto -20% -60% -20%;
  height: 120%;
  background: radial-gradient(closest-side, rgba(var(--net), .18), transparent);
  pointer-events: none;
}
.contact__title {
  position: relative;
  margin: 0 0 28px;
  font-family: var(--display);
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.035em;
}
.contact__mail {
  position: relative;
  display: inline-block;
  font-family: var(--mono);
  font-size: clamp(.95rem, 2.2vw, 1.25rem);
  color: var(--ink);
  padding-bottom: 4px;
  border-bottom: 2px solid var(--accent);
}
.contact__mail span { display: inline-block; transition: transform .25s ease; }
.contact__mail:hover span { transform: translateX(6px); }
.contact__links { position: relative; display: flex; justify-content: center; gap: 22px; margin-top: 26px; }
.contact__links a { color: var(--ink-2); font-weight: 500; }
.contact__links a:hover { color: var(--accent); }

/* ---------- footer ---------- */

.footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 26px 24px 40px;
  font-size: .85rem;
  color: var(--ink-3);
  border-top: 1px solid var(--line);
}
kbd {
  padding: 1px 7px;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
}

/* ---------- page-wide agent tour (press g) ---------- */

.tour-cursor {
  position: fixed;
  top: 0; left: 0;
  z-index: 80;
  pointer-events: none;
  transition: transform 1s cubic-bezier(.65, 0, .25, 1), opacity .3s;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, .3));
}
.tour-label {
  position: absolute;
  left: 22px; top: 22px;
  padding: 4px 10px;
  font-family: var(--mono);
  font-size: .75rem;
  white-space: nowrap;
  color: #fff;
  background: var(--accent);
  border-radius: 8px;
}
.tour-ripple { position: fixed; z-index: 79; }

/* ---------- Soul仔 desktop pet ---------- */

.pet {
  position: fixed;
  right: 20px;
  bottom: 18px;
  z-index: 70;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .5s ease, transform .5s cubic-bezier(.3,1.4,.5,1);
  pointer-events: none;
}
.pet.is-in { opacity: 1; transform: none; }
.pet.is-hidden { display: none; }
.pet__sprite {
  width: 150px;
  aspect-ratio: 192 / 208;
  background-repeat: no-repeat;
  background-size: 800% 1100%;
  background-position: 0 0;
  cursor: grab;
  pointer-events: auto;
  touch-action: none;
  filter: drop-shadow(0 8px 10px rgba(0, 0, 0, .22));
  -webkit-user-select: none;
          user-select: none;
  outline: none;
}
.pet__sprite:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 12px; }
.pet.is-drag .pet__sprite { cursor: grabbing; filter: drop-shadow(0 18px 16px rgba(0, 0, 0, .28)); }

.pet__bubble {
  position: absolute;
  right: 70%;
  bottom: 88%;
  width: max-content;
  max-width: 220px;
  padding: 9px 13px;
  font-size: .84rem;
  line-height: 1.45;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px 14px 4px 14px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(6px) scale(.96);
  transform-origin: 100% 100%;
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
}
.pet.is-talking .pet__bubble { opacity: 1; transform: none; }
.pet.is-left .pet__bubble { right: auto; left: 70%; border-radius: 14px 14px 14px 4px; transform-origin: 0 100%; }

.pet__close {
  position: absolute;
  top: 2px; right: 6px;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 22px; height: 22px;
  padding: 0;
  font-size: 15px;
  line-height: 1;
  color: var(--ink-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  opacity: 0;
  transition: opacity .2s ease;
  pointer-events: auto;
}
.pet:hover .pet__close, .pet__close:focus-visible { opacity: 1; }

.pet__note {
  position: absolute;
  top: 6px; left: 8px;
  font-size: 1.1rem;
  color: var(--accent-2);
  opacity: 0;
  pointer-events: none;
}
.pet.is-jamming .pet__note { animation: noteFloat 1.6s ease-out infinite; }
@keyframes noteFloat {
  0% { opacity: 0; transform: translate(0, 10px) rotate(-10deg); }
  25% { opacity: 1; }
  100% { opacity: 0; transform: translate(-18px, -34px) rotate(12deg); }
}

.pet-summon {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 70;
  display: none;
  width: 42px; height: 42px;
  font-size: 1.2rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 50%;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform .2s ease;
}
.pet-summon.is-shown { display: grid; place-items: center; }
.pet-summon:hover { transform: rotate(-12deg) scale(1.08); }

@media (max-width: 640px) {
  .pet__sprite { width: 112px; }
  .pet__close { opacity: 1; width: 20px; height: 20px; font-size: 13px; }
  .pet__bubble { max-width: 180px; font-size: .8rem; }
}

/* ---------- responsive ---------- */

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 44px; padding-top: 110px; }
  .agent { transform: none; max-width: 560px; }
  .about { grid-template-columns: 1fr; gap: 32px; }
  .about__photo { max-width: 220px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .honors { grid-template-columns: repeat(2, 1fr); }
  .pub { grid-template-columns: 220px 1fr; gap: 20px; }
  .music { grid-template-columns: 1fr; gap: 36px; padding: 32px; }
  .music__art { max-width: 220px; margin-right: 70px; }
}

@media (max-width: 720px) {
  .nav { padding-left: 14px; gap: 2px; }
  .nav__brand { margin-right: 4px; }
  .nav__links { overflow-x: auto; scrollbar-width: none; }
  .nav__links::-webkit-scrollbar { display: none; }
  .nav__links a { padding: 7px 10px; font-size: .82rem; }
  .nav__links a[href="#contact"],
  .nav__links a[href="#music"] { display: none; }
}

@media (max-width: 640px) {
  body { font-size: 15px; }
  .hero { padding: 100px 16px 56px; min-height: auto; }
  .section { padding: 64px 16px; }
  .section__head { margin-bottom: 30px; }
  .agent__screen { padding: 14px; }
  .agent__grid { gap: 10px; }
  .tile { min-height: 92px; padding: 13px; }
  .pub { grid-template-columns: 1fr; padding: 14px; gap: 16px; }
  .timeline { padding-left: 34px; }
  .timeline::before, .timeline__fill { left: 8px; }
  .tl__node { left: -34px; width: 20px; height: 20px; }
  .tl__card { padding: 18px; }
  .honors { grid-template-columns: 1fr 1fr; gap: 12px; }
  .honor { padding: 18px 16px; }
  .contact__inner { padding: 44px 20px; border-radius: 24px; }
  .music { padding: 22px 18px; border-radius: 22px; }
  .music__art { max-width: 190px; }
  .playlist__btn { grid-template-columns: 26px 1fr; row-gap: 0; padding: 10px 4px 10px 8px; }
  .playlist__a { grid-column: 2; }
  .footer { flex-direction: column; padding: 22px 16px 32px; }
  .footer__hint { display: none; }
}

@media (max-width: 420px) {
  .nav__links a[href="#honors"] { display: none; }
  .honors { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .agent { transform: none; }
}

/* ---------- Chinese typography ---------- */

html[lang="zh-CN"] body { line-height: 1.8; }
html[lang="zh-CN"] .section__head h2,
html[lang="zh-CN"] .contact__title,
html[lang="zh-CN"] .music__body h3,
html[lang="zh-CN"] .hero__tagline,
html[lang="zh-CN"] .tl__card h3,
html[lang="zh-CN"] .honor h3 { letter-spacing: .01em; }
html[lang="zh-CN"] .contact__title { line-height: 1.25; }
html[lang="zh-CN"] .lead { line-height: 1.8; }
html[lang="zh-CN"] .stat__l { font-size: .85rem; }