@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500;600;700&family=Geist+Mono:wght@400;500&family=Newsreader:opsz,wght@6..72,400;6..72,500;6..72,600&display=swap');

/* =========================================================
   Aolong Sun · v3
   References: lumai.ai · anthropic · jonbarron · karpathy
   Tone: editorial, scientific, modern neo-grotesque
   ========================================================= */

:root {
  --bg: #07080b;
  --bg-2: #0c0e13;
  --bg-3: #11141a;
  --ink: #eef1f7;
  --ink-soft: #d3d8e3;
  --ink-dim: #a4adbb;
  --ink-mute: #6c7585;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --accent: #6ee7ff;
  --accent-soft: rgba(110, 231, 255, 0.7);
  --accent-bg: rgba(110, 231, 255, 0.08);
  --accent-2: #b794ff;
  --accent-warm: #ffb86b;

  --display: "Geist", "Inter", -apple-system, "Segoe UI", system-ui, sans-serif;
  --serif: "Newsreader", "Iowan Old Style", Cambria, Georgia, serif;
  --sans: "Geist", "Inter", "Noto Sans SC", "PingFang SC", -apple-system, "Segoe UI", system-ui, sans-serif;
  --mono: "Geist", "Inter", -apple-system, "Segoe UI", sans-serif;
  --code: "Geist Mono", "JetBrains Mono", ui-monospace, "Cascadia Code", Menlo, monospace;

  --maxw: 1180px;
  --pad: clamp(20px, 4vw, 56px);
  --rail-w: 1px;
  --rail-color: var(--line-strong);
  --node: 7px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss03", "cv11", "tnum";
  overflow-x: hidden;
}
[data-lang="zh"] body { font-family: "Noto Sans SC", "PingFang SC", var(--sans); }

a { color: inherit; text-decoration: none; }
strong { font-weight: 500; color: var(--ink); }
em { font-style: normal; color: var(--ink); font-weight: 500; }

/* Editorial label — Geist with tracking */
.mono {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  font-feature-settings: "tnum", "ss03";
}
.dim  { color: var(--ink-dim); }

/* hide/show by language */
[data-lang="en"] [data-en], [data-lang="zh"] [data-zh] { display: inline; }

/* =========================================================
   Background
   ========================================================= */
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.028) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at 50% 25%, #000 30%, transparent 80%);
}
.bg-glow {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    radial-gradient(700px 500px at 85% -5%, rgba(110, 231, 255, 0.09), transparent 60%),
    radial-gradient(800px 600px at -5% 55%, rgba(183, 148, 255, 0.06), transparent 65%);
}
#photon-canvas {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  width: 100%; height: 100%;
  opacity: 0.45;
}
header, section, footer { position: relative; z-index: 1; }

/* =========================================================
   NAV
   ========================================================= */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(7, 8, 11, 0.7);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px var(--pad);
  display: flex; align-items: center; gap: 20px;
}
.nav-mark { display: flex; align-items: baseline; gap: 8px; }
.mark-symbol {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: 0.06em;
  color: var(--ink);
}
.mark-meta { color: var(--ink-dim); font-size: 11px; }

.nav-links {
  margin-left: auto;
  display: flex; gap: 22px;
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.nav-links a {
  color: var(--ink-soft);
  transition: color 0.25s ease;
  display: inline-flex; gap: 6px; align-items: baseline;
}
.nav-links a:hover { color: var(--accent); }
.nav-links .num { color: var(--accent); font-size: 10px; }

.nav-right { display: flex; align-items: center; gap: 14px; }

.lang-toggle {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px;
  transition: border-color 0.25s ease;
}
.lang-toggle:hover { border-color: var(--accent); }
.lang-toggle .active { color: var(--ink); }
.lang-toggle .lang-sep { color: var(--ink-dim); }

.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.25s ease;
}
.nav-cta:hover { border-color: var(--accent); color: var(--accent); }

@media (max-width: 900px) {
  .nav-links { display: none; }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 64px var(--pad) 64px;
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto auto auto;
  grid-template-areas:
    "meta"
    "body"
    "stats";
  gap: 40px;
  isolation: isolate;
}

/* prism dispersion as hero background */
.prism-bg {
  position: absolute;
  inset: -40px -10vw -40px 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.55;
  mask-image: radial-gradient(ellipse 80% 70% at 70% 50%, #000 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 70% 50%, #000 30%, transparent 90%);
}
.prism-bg svg {
  width: 100%; height: 100%; display: block;
}

@media (max-width: 700px) {
  .prism-bg { opacity: 0.32; inset: -20px 0; }
}

.hero-meta-bar { grid-area: meta; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; }
.hero-meta-bar .meta-row { display: inline-flex; align-items: center; gap: 8px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); animation: pulse 2.4s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:0.5;transform:scale(0.85);} }

.hero-body { grid-area: body; max-width: 720px; }

.kicker {
  display: inline-flex; gap: 10px; align-items: center;
  color: var(--ink-soft);
  margin-bottom: 28px;
  font-size: 12px;
}
.kicker .sep { color: var(--accent); }

.display {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1;
  letter-spacing: -0.04em;
  margin: 0;
  font-feature-settings: "ss01";
}
.display-line { display: block; }
.accent-line { color: var(--ink); position: relative; padding-right: 0.1em; }
.accent-line::after {
  content: "";
  display: inline-block;
  width: 10px; height: 10px;
  margin-left: 14px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px var(--accent);
  vertical-align: middle;
  animation: pulse 2.4s ease-in-out infinite;
}
.display-zh {
  font-family: "Noto Sans SC", "PingFang SC", var(--sans);
  font-size: clamp(14px, 1.2vw, 16px);
  font-weight: 400;
  color: var(--ink-dim);
  letter-spacing: 0.28em;
  margin: 16px 0 32px;
}

.lede {
  font-family: var(--sans);
  font-size: clamp(17px, 1.3vw, 20px);
  line-height: 1.5;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -0.005em;
  max-width: 620px;
  margin: 0 0 36px;
}

/* prism dispersion */
.prism {
  max-width: 560px;
  margin: 4px 0 32px;
  position: relative;
}
.prism svg { display: block; width: 100%; height: auto; }

/* spectrum (legacy, kept for compatibility) */
.spectrum { max-width: 560px; margin-bottom: 32px; }
.spectrum-bar {
  height: 5px;
  border-radius: 1px;
  background: linear-gradient(90deg,
    #2b1466 0%, #1f3aa8 14%, #25a4d8 32%, #44d9b3 48%,
    #d3e150 62%, #f08a3c 78%, #c4243d 92%, #5a0a1d 100%);
  position: relative;
  box-shadow: 0 0 16px rgba(110, 231, 255, 0.2);
}
.spectrum-bar::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
  animation: shimmer 5s linear infinite;
}
@keyframes shimmer { 0%{transform:translateX(-100%);} 100%{transform:translateX(100%);} }
.spectrum-ticks {
  display: flex; justify-content: space-between;
  font-family: var(--mono); font-size: 11px; color: var(--ink-soft);
  margin-top: 6px; letter-spacing: 0.05em;
}
.spectrum-label { margin-top: 6px; color: var(--ink-dim); font-size: 11px; }

/* buttons */
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 36px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  box-sizing: border-box;
  padding: 14px 26px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border-radius: 999px;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
  border: 1px solid transparent;
  line-height: 1;
  white-space: nowrap;
}
.btn > span { display: inline-block; line-height: 1; }
[data-lang="zh"] .btn { letter-spacing: 0.05em; }
.btn svg { flex-shrink: 0; }
.btn.primary { background: var(--accent); color: #042127; }
.btn.primary:hover { background: #fff; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(110, 231, 255, 0.3); }
.btn.ghost { border-color: var(--line-strong); color: var(--ink); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }

/* hero side */
.hero-side { grid-area: side; display: flex; flex-direction: column; gap: 14px; }

/* Abstract optical artwork panel */
.optical-art {
  position: relative;
  aspect-ratio: 3/4;
  border: 1px solid var(--line-strong);
  background: var(--bg-2);
  overflow: hidden;
  border-radius: 2px;
}
.optical-art svg { display: block; width: 100%; height: 100%; }
.optical-art::after {
  content: "";
  position: absolute; inset: 0;
  pointer-events: none;
  background:
    linear-gradient(transparent 49.6%, rgba(110,231,255,0.05) 50%, transparent 50.4%),
    linear-gradient(90deg, transparent 49.6%, rgba(110,231,255,0.05) 50%, transparent 50.4%);
  z-index: 2;
}

/* hero stats */
.hero-stats {
  grid-area: stats;
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--line);
}
.stat { background: var(--bg); padding: 22px 18px; display: flex; flex-direction: column; gap: 6px; }
.stat-num {
  font-family: var(--serif);
  font-size: clamp(34px, 4.4vw, 52px);
  font-weight: 400;
  line-height: 1;
  color: var(--ink);
}
.stat-num sup { font-size: 0.5em; color: var(--accent); margin-left: 2px; }
.stat-label { color: var(--ink-soft); font-size: 11.5px; }
@media (max-width: 700px) { .hero-stats { grid-template-columns: repeat(2, 1fr); } }

/* =========================================================
   SECTIONS
   ========================================================= */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px var(--pad) 32px;
}
.section-head {
  margin-bottom: 56px;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 28px;
}
.section-num { color: var(--accent); font-size: 12px; margin-top: 6px; }
.section-title {
  font-family: var(--display);
  font-size: clamp(26px, 2.8vw, 40px);
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 820px;
  color: var(--ink);
}
@media (max-width: 700px) { .section-head { grid-template-columns: 1fr; gap: 14px; } }

.sub-h3 {
  margin: 64px 0 24px;
  color: var(--accent);
  font-size: 12px;
}

/* =========================================================
   TIMELINE RAIL (shared)
   ========================================================= */
.timeline-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.timeline-rail::before {
  content: "";
  position: absolute;
  left: 110px;
  top: 6px;
  bottom: 6px;
  width: var(--rail-w);
  background: var(--rail-color);
}
.timeline-rail > li {
  position: relative;
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 32px;
  padding: 18px 0;
}
.tl-node {
  position: absolute;
  left: calc(110px - var(--node) / 2);
  top: 28px;
  width: var(--node);
  height: var(--node);
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--accent);
  box-shadow: 0 0 0 3px var(--bg), 0 0 10px var(--accent-bg);
  z-index: 2;
}
.tl-year { color: var(--accent); font-size: 11px; padding-top: 8px; text-align: right; padding-right: 24px; }
.tl-body strong { display: block; margin-bottom: 4px; font-weight: 500; color: var(--ink); font-size: 16px; }
.tl-body .dim { font-size: 14px; color: var(--ink-soft); }

/* large rail for projects */
.timeline-rail.rail-large > li { padding: 28px 0; }
.timeline-rail.rail-large .tl-body h3 {
  font-family: var(--serif);
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 400;
  line-height: 1.3;
  margin: 8px 0 10px;
  color: var(--ink);
}
.proj-fund { display: block; color: var(--accent); margin-bottom: 4px; font-size: 11px; }
.proj-role {
  display: inline-block;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  padding: 3px 10px;
  border-radius: 999px;
  margin: 4px 0 14px;
}
.timeline-rail.rail-large .tl-body p { color: var(--ink-soft); font-size: 15.5px; line-height: 1.7; margin: 0; max-width: 700px; }

@media (max-width: 700px) {
  .timeline-rail::before { left: 8px; }
  .timeline-rail > li { grid-template-columns: 1fr; gap: 4px; padding-left: 28px; }
  .tl-node { left: calc(8px - var(--node) / 2); top: 24px; }
  .tl-year { text-align: left; padding-right: 0; }
}

/* =========================================================
   ABOUT
   ========================================================= */
.about-grid { display: grid; grid-template-columns: 1fr 360px; gap: 56px; }
@media (max-width: 960px) { .about-grid { grid-template-columns: 1fr; } }
.about-text p { font-size: 17px; line-height: 1.8; max-width: 640px; color: var(--ink); margin: 0 0 22px; }

/* Capabilities */
.caps { margin-top: 32px; }
.caps-head {
  color: var(--accent);
  margin-bottom: 14px;
}
.caps-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.caps-grid li {
  background: var(--bg);
  padding: 18px 18px 20px;
  position: relative;
  transition: background 0.3s ease;
}
.caps-grid li:hover { background: var(--bg-2); }
.cap-num {
  color: var(--accent);
  font-size: 10px;
  margin-bottom: 8px;
  display: block;
}
.cap-title {
  font-family: var(--display);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
[data-lang="zh"] .cap-title { font-family: "Noto Sans SC", "PingFang SC", var(--sans); }
.cap-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-dim);
}
@media (max-width: 640px) {
  .caps-grid { grid-template-columns: 1fr; }
}

.about-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
  padding: 24px 24px 28px;
  position: relative;
}
.about-card::before {
  content: ""; position: absolute; top: -1px; left: -1px;
  width: 18px; height: 18px;
  border-top: 1px solid var(--accent);
  border-left: 1px solid var(--accent);
}
.about-card::after {
  content: ""; position: absolute; bottom: -1px; right: -1px;
  width: 18px; height: 18px;
  border-bottom: 1px solid var(--accent);
  border-right: 1px solid var(--accent);
}
.card-head { color: var(--accent); margin-bottom: 12px; font-size: 12px; }
.about-card .timeline-rail::before { left: 116px; }
.about-card .timeline-rail > li { grid-template-columns: 116px 1fr; gap: 16px; padding: 14px 0; }
.about-card .tl-node { left: calc(116px - var(--node) / 2); top: 22px; }
.about-card .tl-year { padding-right: 14px; padding-top: 6px; font-size: 10px; white-space: nowrap; text-align: right; letter-spacing: 0.04em; }
.about-card .tl-body {
  min-width: 0;
  overflow-wrap: break-word;
  word-break: keep-all;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.about-card .inst-badge {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  border-radius: 6px;
  background: #f4f5f8;
  border: 1px solid var(--line-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 4px;
  margin-top: 2px;
}
.about-card .inst-badge.badge-dark {
  background: #11233a;
  border-color: rgba(110, 231, 255, 0.35);
}
.about-card .inst-badge img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}
.about-card .tl-text { min-width: 0; flex: 1 1 auto; }
.about-card .tl-inst {
  display: block;
  font-family: var(--display);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 4px;
}
.about-card .tl-role {
  display: block;
  font-size: 12.5px;
  color: var(--ink-dim);
  line-height: 1.45;
}
[data-lang="zh"] .about-card .tl-inst { font-family: "Noto Sans SC", "PingFang SC", var(--sans); }
@media (max-width: 700px) {
  .about-card .timeline-rail::before { left: 8px; }
  .about-card .timeline-rail > li { grid-template-columns: 1fr; padding-left: 24px; }
  .about-card .tl-node { left: calc(8px - var(--node) / 2); }
}

/* =========================================================
   PUBLICATIONS — blog cards
   ========================================================= */
.pubs-tabs {
  display: flex; gap: 8px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
}
.tab {
  background: transparent;
  border: 1px solid var(--line-strong);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 9px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.tab:hover { color: var(--ink); }
.tab.active { background: var(--accent); color: #042127; border-color: var(--accent); }

.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list.hidden { display: none; }

.pub { border-top: 1px solid var(--line); }
.pub:last-child { border-bottom: 1px solid var(--line); }

.pub-link {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 28px;
  padding: 24px 8px;
  align-items: center;
  transition: background 0.25s ease, padding 0.25s ease;
  border-radius: 4px;
}
.pub-link:hover { background: rgba(110, 231, 255, 0.03); padding-left: 16px; }

.pub-teaser {
  aspect-ratio: 3/2;
  background: var(--bg-2);
  border: 1px solid var(--line);
  overflow: hidden;
  position: relative;
  transition: border-color 0.25s ease;
}
.pub-link:hover .pub-teaser { border-color: var(--accent-soft); }
.pub-teaser svg { display: block; width: 100%; height: 100%; }

.pub-body { min-width: 0; }
.pub-meta {
  color: var(--ink-soft);
  font-size: 11.5px;
  margin-bottom: 12px;
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
}
.pub-meta .pub-venue { color: var(--accent); font-weight: 500; }
.pub-meta .pub-sep { color: var(--ink-dim); }
.pub-meta .pub-role { color: var(--ink); }
.pub-meta .badge {
  padding: 2px 7px;
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  border-radius: 2px;
  background: var(--accent-bg);
  font-size: 10.5px;
}

.pub-title {
  font-family: var(--display);
  font-size: 20px;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  color: var(--ink);
}
.pub-tldr { color: var(--ink-soft); font-size: 14.5px; line-height: 1.65; margin: 0; max-width: 660px; }

.pub-actions { display: flex; align-items: center; gap: 12px; }
.btn-mini {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 7px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: all 0.25s ease;
}
.pub-link:hover .btn-mini { color: var(--accent); border-color: var(--accent-soft); }

@media (max-width: 800px) {
  .pub-link { grid-template-columns: 1fr; gap: 14px; padding: 20px 0; }
  .pub-link:hover { padding-left: 0; }
  .pub-actions { display: none; }
  .pub-teaser { max-width: 200px; }
}

/* =========================================================
   AWARDS
   ========================================================= */
.awards-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
@media (max-width: 700px) { .awards-grid { grid-template-columns: 1fr; gap: 32px; } }
.col-head { color: var(--accent); margin-bottom: 14px; font-size: 12px; }
.awards-grid ul { list-style: none; margin: 0; padding: 0; }
.awards-grid li {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink);
}
.awards-grid li .y { color: var(--accent); font-size: 11px; padding-top: 3px; }

/* patents (timeline) */
.patents-tl .tl-body { min-width: 0; overflow-wrap: break-word; word-break: keep-all; }
.patents-tl .tl-body > strong {
  display: block;
  font-family: var(--display);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin-bottom: 6px;
}
.patents-tl .tl-body .dim strong {
  display: inline;
  font-family: inherit;
  font-size: inherit;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0;
}
.patents-tl .tl-body .dim { font-size: 13px; line-height: 1.55; margin-top: 2px; }
.patents-tl .tl-body .dim.mono { font-size: 10.5px; letter-spacing: 0.08em; margin-bottom: 2px; }
[data-lang="zh"] .patents-tl .tl-body > strong { font-family: "Noto Sans SC", "PingFang SC", var(--sans); }

/* =========================================================
   NEWS
   ========================================================= */
.news-list {
  list-style: none; margin: 0; padding: 0;
  position: relative;
}
.news-list::before {
  content: "";
  position: absolute;
  left: 90px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--line-strong);
}
.news-list li {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 32px;
  padding: 14px 0;
  position: relative;
  border-bottom: 1px dashed var(--line);
}
.news-list li::after {
  content: "";
  position: absolute;
  left: calc(90px - 3px);
  top: 24px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--accent);
  z-index: 2;
}
.news-date { color: var(--accent); font-size: 11.5px; padding-top: 4px; text-align: right; padding-right: 18px; }
.news-body { color: var(--ink); font-size: 15px; line-height: 1.65; max-width: 720px; }

@media (max-width: 700px) {
  .news-list::before { left: 4px; }
  .news-list li { grid-template-columns: 1fr; gap: 4px; padding-left: 24px; }
  .news-list li::after { left: 1px; }
  .news-date { text-align: left; padding-right: 0; }
}

/* =========================================================
   CONTACT
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 600px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-card {
  position: relative;
  border: 1px solid var(--line);
  padding: 24px;
  display: block;
  transition: all 0.25s ease;
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.contact-card:not(.static):hover {
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(110,231,255,0.05), transparent);
}
.cc-label { color: var(--accent); margin-bottom: 10px; font-size: 12px; }
.cc-val {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 4px;
}
.cc-arrow { position: absolute; top: 24px; right: 24px; color: var(--ink-mute); transition: all 0.25s ease; }
.contact-card:hover .cc-arrow { color: var(--accent); transform: translate(2px, -2px); }

/* =========================================================
   SITE FOOTER (replaces old .footer + .contact)
   ========================================================= */
.site-footer {
  margin-top: 120px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(110, 231, 255, 0.025));
  position: relative;
  z-index: 1;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 80px var(--pad) 28px;
}

/* hero row */
.footer-hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: end;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 56px;
}
.fh-eyebrow {
  color: var(--accent);
  font-size: 11px;
  margin-bottom: 18px;
}
.fh-title {
  font-family: var(--display);
  font-size: clamp(28px, 3.4vw, 48px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin: 0;
  max-width: 700px;
  color: var(--ink);
}
[data-lang="zh"] .fh-title { font-family: "Noto Sans SC", "PingFang SC", var(--sans); }

.fh-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 28px;
  background: var(--accent);
  color: #042127;
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 500;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.fh-cta:hover {
  background: #fff;
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(110, 231, 255, 0.3);
}

@media (max-width: 700px) {
  .footer-hero { grid-template-columns: 1fr; gap: 24px; align-items: start; }
  .fh-cta { align-self: flex-start; }
}

/* columns */
.footer-cols {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 24px;
}
.fc-brand .fc-logo {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.fc-brand .fc-zh {
  font-family: "Noto Sans SC", "PingFang SC", var(--sans);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.4em;
  color: var(--ink-dim);
  margin: 4px 0 18px;
}
.fc-brand .fc-blurb {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-dim);
  max-width: 320px;
  margin: 0;
}

.fc-col .fc-head {
  color: var(--accent);
  font-size: 10.5px;
  margin-bottom: 14px;
}
.fc-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.fc-col li {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
}
.fc-col li.muted { color: var(--ink-mute); font-size: 12.5px; }
.fc-col li a {
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.fc-col li a:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
}

@media (max-width: 900px) {
  .footer-cols { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
}
@media (max-width: 540px) {
  .footer-cols { grid-template-columns: 1fr; }
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10.5px;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
}
.footer-bottom .muted { color: var(--ink-mute); }

/* =========================================================
   Reveal-on-scroll
   ========================================================= */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.8s ease, transform 0.8s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

::selection { background: var(--accent); color: #042127; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: rgba(110,231,255,0.3); }

/* =========================================================
   PAPER DETAIL PAGE
   ========================================================= */
.paper-page {
  max-width: 820px;
  margin: 0 auto;
  padding: 56px var(--pad) 80px;
}

.paper-back {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: 40px;
  transition: color 0.25s ease;
}
.paper-back:hover { color: var(--accent); }

.paper-meta {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 18px;
}
.paper-meta .venue { color: var(--accent); }
.paper-meta .sep { color: var(--ink-dim); }
.paper-meta .badge {
  padding: 2px 9px;
  border: 1px solid var(--accent-soft);
  color: var(--accent);
  border-radius: 2px;
  background: var(--accent-bg);
  font-size: 10.5px;
}

.paper-title {
  font-family: var(--display);
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin: 0 0 20px;
  color: var(--ink);
}

.paper-authors { color: var(--ink-soft); font-size: 15px; line-height: 1.65; margin: 0 0 36px; }
.paper-authors strong { color: var(--accent); font-weight: 500; }

.paper-links {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-bottom: 48px;
}
.paper-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  transition: all 0.25s ease;
}
.paper-link:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
.paper-link.primary { background: var(--accent); color: #042127; border-color: var(--accent); font-weight: 500; }
.paper-link.primary:hover { background: #fff; }

.paper-figure {
  border: 1px solid var(--line);
  background: #f6f7fa;
  margin: 0 0 36px;
  position: relative;
  overflow: hidden;
}
.paper-figure svg { width: 100%; height: auto; display: block; aspect-ratio: 2/1; background: var(--bg-2); }
.paper-figure img {
  width: 100%;
  height: auto;
  display: block;
  filter: contrast(1.02);
}
.paper-figure.figure-svg { aspect-ratio: 2/1; display: flex; align-items: center; justify-content: center; background: var(--bg-2); }
.paper-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  box-shadow: inset 0 0 0 1px rgba(110, 231, 255, 0.12);
}
.paper-figure-caption { font-family: var(--mono); font-size: 11.5px; color: var(--ink-soft); margin: -28px 0 36px; padding-left: 4px; }

.paper-section { margin-bottom: 40px; }
.paper-section h2 {
  font-family: var(--sans);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 16px;
  font-weight: 600;
}
.paper-section p {
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  margin: 0 0 16px;
  letter-spacing: -0.005em;
}
.paper-section ul { color: var(--ink); font-size: 16px; line-height: 1.7; padding-left: 22px; }
.paper-section li { margin-bottom: 8px; }

.tldr-box {
  border-left: 3px solid var(--accent);
  background: var(--accent-bg);
  padding: 22px 24px;
  margin: 0 0 36px;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.tldr-label { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 8px; font-weight: 500; }

.paper-nav {
  display: flex; justify-content: space-between; gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 32px;
  margin-top: 56px;
}
.paper-nav a {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--ink-soft); transition: color 0.25s ease;
}
.paper-nav a:hover { color: var(--accent); }