:root {
  --bg: #f5f7fb;
  --tint: #eef3fb;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #5b6474;
  --border: #d8dfeb;
  --shadow: 0 12px 30px rgba(17, 35, 68, 0.1);
  --github: #24292f;
  --github-hover: #1b1f23;
  --arxiv: #b31b1b;
  --arxiv-hover: #981616;
  --data: #2f6feb;
  --data-hover: #2557b7;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Times New Roman", Times, serif;
  color: var(--text);
  background: linear-gradient(180deg, #eff3fb 0%, var(--bg) 24%, var(--bg) 100%);
}
a { color: #1e5ed8; text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(1120px, 92vw); margin: 0 auto; }
.container.narrow { width: min(900px, 92vw); margin: 0 auto; }
.hero {
  border-bottom: 1px solid var(--border);
  padding: 54px 0 40px;
  text-align: center;
}
.hero .container {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 38px 26px;
}
.hero h1 {
  color: #14233f;
  font-family: "Times New Roman", Times, serif;
  font-size: clamp(1.7rem, 2.7vw, 2.5rem);
  font-weight: 700;
  line-height: 1.12;
  margin: 0 auto 14px;
  max-width: 980px;
  text-wrap: balance;
  text-shadow: 0 1px 0 rgba(255,255,255,.75), 0 10px 22px rgba(22,44,86,.16);
}
.venue { color: var(--muted); font-size: 1.28rem; font-weight: 800; margin: 0 0 20px; letter-spacing: 0.015em; }
.authors {
  display: grid;
  gap: 8px;
  margin: 0 auto 14px;
  max-width: 980px;
}
.authors-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: center;
  line-height: 1.8;
}
.authors a, .author-name { color: var(--text); font-weight: 600; }
.authors .author-name { display: inline-flex; }
.affiliations {
  color: var(--muted); display: flex; flex-wrap: wrap; gap: 10px 24px;
  justify-content: center; margin: 0 auto; font-size: 0.98rem;
}
.author-note {
  color: var(--muted);
  font-size: 0.98rem;
  margin: 10px auto 0;
  text-align: center;
}
.author-note-marker { font-weight: 800; margin-right: 4px; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 22px; }
.btn {
  border-radius: 999px; color: #fff; display: inline-flex; align-items: center; gap: 8px;
  font-size: .95rem; font-weight: 600; min-width: 98px; padding: 10px 18px;
  transition: background .2s ease, transform .2s ease; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-arxiv { background: var(--arxiv); }
.btn-arxiv:hover { background: var(--arxiv-hover); }
.btn-arxiv i {
  color: #b31b1b;
  background: #f3f4f6;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.98rem;
  flex: 0 0 1.7rem;
}
.btn-github { background: var(--github); }
.btn-github:hover { background: var(--github-hover); }
.btn-github i {
  color: #24292f;
  background: #f3f4f6;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.98rem;
  flex: 0 0 1.7rem;
}
.btn-data { background: var(--data); }
.btn-data:hover { background: var(--data-hover); }
.section { padding: 42px 0; }
.section--tint {
  background: var(--tint);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section h2 { font-size: clamp(1.45rem, 2.1vw, 1.8rem); margin: 0 0 18px; text-align: center; }
.abstract-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 18px 20px;
}
.abstract-body { line-height: 1.78; text-align: justify; }
.media-card, .demo-card, .skill-card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  box-shadow: var(--shadow); margin: 0; overflow: hidden;
}
.media-card { padding: 16px; }
.media-card img { border-radius: 12px; display: block; width: 100%; }
.demo-grid {
  display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.demo-card, .skill-card { padding: 14px; }
.demo-card h3, .skill-card h3 { margin: 0 0 10px; text-align: center; font-size: 1rem; }
.demo-card video, .skill-card video {
  display: block; width: 100%; background: #0f1728; border-radius: 10px;
}
.demo-card video { aspect-ratio: 16 / 9; }
.skill-grid {
  display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}
.skill-card video { aspect-ratio: 4 / 3; object-fit: cover; }
pre {
  background: #f3f4f6; border-radius: 12px; color: #334155; margin: 0; overflow-x: auto; padding: 18px;
}
code { font-family: "SFMono-Regular", Menlo, Consolas, Monaco, monospace; font-size: .92rem; line-height: 1.65; }
.footer { border-top: 1px solid var(--border); color: var(--muted); padding: 28px 0 42px; text-align: center; }
@media (max-width: 560px) {
  .hero { padding: 42px 0 32px; }
  .hero .container { padding: 28px 18px; }
  .btn { width: 100%; justify-content: center; }
}

.btn-paper i,
.btn-pdf i,
.btn-supp i,
.btn-data i {
  color: #334155;
  background: #f3f4f6;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 0.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.98rem;
  flex: 0 0 1.7rem;
}

.btn-pdf { background: #b31b1b; color: #ffffff; }
.btn-pdf:hover { background: #981616; color: #ffffff; }
.btn-pdf i { color: #b31b1b; background: #f3f4f6; }

.btn-paper i { color: #b31b1b; background: #f3f4f6; }

.btn-paper { background: #b31b1b; color: #ffffff; }
.btn-paper:hover { background: #981616; color: #ffffff; }
.btn-paper i { color: #b31b1b; background: #f3f4f6; }

.btn span {
  font-weight: 800;
  letter-spacing: 0.01em;
}