:root {
  --bg: #faf9f7;
  --bg-alt: #f0eeea;
  --surface: #ffffff;
  --ink: #1a1f24;
  --ink-muted: #4a5560;
  --accent: #1e4d5c;
  --accent-soft: #2d6b7f;
  --accent-wash: rgba(30, 77, 92, 0.08);
  --border: rgba(26, 31, 36, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(26, 31, 36, 0.06), 0 8px 24px rgba(26, 31, 36, 0.06);
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --max: 1120px;
  --header-h: 4rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -100px;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  text-decoration: none;
  z-index: 100;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 99;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
  gap: 1rem;
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.logo {
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  font-size: 0.95rem;
}

.logo-w {
  color: var(--accent);
  font-weight: 500;
}

.nav {
  display: none;
  align-items: center;
  gap: 1.2rem;
  font-size: 0.9rem;
}

.nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.1rem;
  line-height: 1;
  color: var(--ink-muted);
  text-decoration: none;
}

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
}

.nav-pill {
  border: 1px solid var(--accent);
  color: var(--accent) !important;
  padding: 0.45rem 0.78rem;
  border-radius: 999px;
}

.nav-pill.is-current {
  background: var(--accent);
  color: #fff !important;
}

.nav a.is-current {
  font-weight: 700;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 0;
  width: 2.5rem;
  height: 2.5rem;
}

.nav-toggle span {
  display: block;
  width: 1.35rem;
  height: 2px;
  background: var(--ink);
  margin-inline: auto;
}

.nav-panel {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.75rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.nav-panel[hidden] {
  display: none !important;
}

.nav-panel a {
  padding: 0.55rem 0.5rem;
  color: var(--ink);
  text-decoration: none;
}

.nav-panel .nav-pill {
  display: inline-flex;
  align-self: flex-start;
}

.nav-panel a.is-current {
  font-weight: 700;
}

.hero {
  position: relative;
  padding: clamp(2rem, 5vw, 3rem) 0 clamp(3.5rem, 10vw, 6rem);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-wash), transparent 55%);
  pointer-events: none;
}

.hero .wrap {
  position: relative;
}

.hero-welcome-banner {
  margin: 0 0 1.75rem;
  border-radius: var(--radius);
  padding: clamp(0.65rem, 3vw, 1.25rem) clamp(0.5rem, 4vw, 1.5rem);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 8188 / 2476;
  overflow: hidden;
  background: url("images/about/about-hero.jpg?v=20260413") center center / 100% 100% no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-welcome-title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 3.8vw + 0.55rem, 3.7rem);
  line-height: 1.05;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  max-width: 100%;
  text-wrap: balance;
}

.hero-welcome-copy {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  align-items: center;
}

.hero-welcome-subtitle {
  margin: 0;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  font-size: clamp(0.82rem, 2.4vw + 0.45rem, 2.03rem);
  line-height: 1.2;
  max-width: 100%;
  text-wrap: balance;
}

.page-hero-section {
  padding-bottom: clamp(1.2rem, 3vw, 2rem);
}

.page-hero-banner {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  aspect-ratio: 8188 / 2476;
  background: url("images/about/about-hero.jpg?v=20260413") center center / 100% 100% no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding-inline: clamp(0.5rem, 4vw, 1.5rem);
}

.page-hero-title {
  margin: 0;
  font-family: var(--font-serif);
  /* 原先用 5.4rem 作下限，窄屏会锁死过大；改为 vw+rem 流体，大屏仍可到 ~8.8rem */
  font-size: clamp(1.35rem, 5.5vw + 0.55rem, 8.8rem);
  line-height: 1.15;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
  max-width: 100%;
  text-wrap: balance;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
}

h1 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  line-height: 1.15;
}

.hero-subtitle {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--ink-muted);
  font-weight: 600;
}

.hero-tagline {
  margin: 0 0 1.25rem;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--ink-muted);
  font-size: clamp(1.2rem, 2.5vw, 1.45rem);
}

.hero-footnote {
  margin: 1.25rem 0 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.tag-draft {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0.1rem 0.45rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--accent-wash);
  border-radius: 999px;
  vertical-align: middle;
}

.hero-lead {
  margin: 0 0 1.5rem;
  max-width: 72rem;
  color: var(--ink-muted);
}

.hero-meta {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.btn {
  display: inline-flex;
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--accent);
  border-color: var(--accent);
}

.btn-ghost {
  color: var(--ink-muted);
  border-color: var(--border);
}

.section {
  padding: clamp(3rem, 6vw, 4.5rem) 0;
}

.section-alt {
  background: var(--bg);
}

.news-section-dark {
  background: var(--bg-alt);
}

/* On standalone pages, make content area slightly darker than page hero */
.page-hero-section + .section {
  background: var(--bg-alt);
}

.section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 3vw, 2.1rem);
}

.section-lead,
.section-intro {
  color: var(--ink-muted);
  max-width: 72rem;
  margin: 0 0 1.8rem;
}

.section-lead.tight {
  margin-bottom: 1rem;
}

.subsection-title {
  margin: 2rem 0 0.75rem;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}

.subsection-title-em {
  font-size: 1.2rem;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.cfp-topics {
  margin: 0 0 1.5rem;
  padding-left: 1.25rem;
  color: var(--ink-muted);
  max-width: 72rem;
}

.cfp-topics li {
  margin-bottom: 0.45rem;
}

.table-wrap {
  overflow-x: auto;
  margin: 0 0 1rem;
  max-width: 52rem;
}

.dates-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.dates-table th,
.dates-table td {
  padding: 0.65rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.dates-table th {
  background: var(--bg-alt);
  font-weight: 600;
  color: var(--ink);
}

.dates-table tr:last-child td {
  border-bottom: 0;
}

.fine-print {
  font-size: 0.85rem;
  color: var(--ink-muted);
  max-width: 72rem;
  margin: 0 0 1.5rem;
}

.fine-print.tight-before-list {
  margin-bottom: 0.5rem;
}

.card .cfp-nonarchival-lead {
  margin-top: 0;
}

.task-infra {
  margin: 0 0 1.25rem;
  padding-left: 1.25rem;
  max-width: 72rem;
  color: var(--ink-muted);
}

.task-infra li {
  margin-bottom: 0.4rem;
}

.news-board {
  background: #fcfbf9;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0;
}

#news.section {
  padding-top: clamp(1.5rem, 3vw, 2.2rem);
}

.news-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.news-table th,
.news-table td {
  border-bottom: 1px solid var(--border);
  padding: 0.72rem 0.9rem;
  text-align: left;
  color: var(--ink-muted);
}

.news-table th {
  font-weight: 700;
  color: var(--ink);
  background: #f3f0ec;
}

.news-table tbody tr:nth-child(even) td {
  background: rgba(30, 77, 92, 0.03);
}

.news-table td:first-child,
.news-table th:first-child {
  width: 180px;
}

.news-table tbody tr:last-child td {
  border-bottom: 0;
}

.news-table tbody tr td {
  height: 2.6rem;
}

.news-table tbody tr:hover td {
  background: rgba(30, 77, 92, 0.06);
}

.speaker-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  max-width: 48rem;
  color: var(--ink-muted);
}

.speaker-list li {
  margin-bottom: 0.5rem;
}

.organizer-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1rem;
}

.organizer-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.organizer-photo {
  width: 100%;
  max-width: 200px;
  aspect-ratio: 1;
  margin: 0 0 1rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-alt);
  flex-shrink: 0;
}

.organizer-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Shift focal area down ~20% vs. center crop (Benyou Wang, Li Zhou) */
.organizer-photo--nudge-down img {
  object-position: center calc(50% - 25%);
}

/* António Branco: shift crop ~30% to the right vs. center */
.organizer-photo--nudge-right img {
  object-position: calc(50% - 20%) center;
}

/* Jingting Zheng: keep center and zoom in 20% */
.organizer-photo--zoom-center img {
  object-position: center calc(50% - 25%);
  transform: scale(1.15);
  transform-origin: center center;
}

.organizer-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-family: var(--font-sans);
}

.organizer-role {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-soft);
}

.organizer-card p:not(.organizer-role) {
  margin: 0 0 0.75rem;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

.diversity-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  max-width: 48rem;
  color: var(--ink-muted);
}

.diversity-list li {
  margin-bottom: 0.45rem;
}

.cards-3,
.cfp-tracks,
.bench-grid,
.theme-columns,
.participate-grid,
.footer-grid {
  display: grid;
  gap: 1.25rem;
}

.card,
.bench,
.part-card,
.highlights li,
.venue-aside {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.35rem;
}

.bench {
  border-left: 4px solid var(--accent);
}

.theme-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--ink-muted);
}

.highlights {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.highlights li strong {
  display: block;
  margin-bottom: 0.35rem;
}

.pill-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.pill-list li {
  padding: 0.4rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 999px;
}

.venue {
  display: grid;
  gap: 2rem;
}

.footer-cta {
  background: linear-gradient(160deg, var(--accent) 0%, #163842 100%);
  color: #e8f0f2;
}

.footer-cta h2 {
  color: var(--ink);
}

.site-footer {
  background: var(--ink);
  color: rgba(255, 255, 255, 0.76);
  padding: 3rem 0 1.5rem;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-bottom {
  padding-top: 1.2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 1.5rem;
}

@media (min-width: 768px) {
  .cards-3,
  .bench-grid,
  .participate-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .cfp-tracks {
    grid-template-columns: repeat(2, 1fr);
  }
  .organizer-grid {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  }
  .theme-columns {
    grid-template-columns: repeat(3, 1fr);
  }
  .venue {
    grid-template-columns: 1fr minmax(220px, 280px);
  }
  .footer-grid {
    grid-template-columns: 1.5fr repeat(4, 1fr);
  }
}

@media (min-width: 880px) {
  .nav {
    display: flex;
  }
  .nav-toggle,
  .nav-panel {
    display: none !important;
  }
}


.contact-icon {
  width: 4rem;
  height: 4rem;
  object-fit: contain;
  flex-shrink: 0;
}

.contact-link-with-icon {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
  text-align: center;
}

.contact-method {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  min-width: 18rem;
  text-align: center;
}

.contact-label {
  line-height: 1.25;
  word-break: break-word;
}

.footer-cta .inline-actions .btn {
  background: #fff;
  color: var(--accent) !important;
  border-color: #fff;
}


.docx-verbatim {
  margin: 0 0 1.25rem;
  padding: 1rem 1.1rem;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.92rem;
  line-height: 1.5;
  color: var(--ink-muted);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
}

.shared-task-doc .table-wrap {
  max-width: 72rem;
  width: 100%;
}

.shared-task-doc .example-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  background: #fcfbf9;
  border: 1.5px solid #c4b8a8;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.shared-task-doc .example-table th,
.shared-task-doc .example-table td {
  border: 1px solid #d8cec0;
  padding: 0.7rem 0.85rem;
  text-align: left;
  vertical-align: top;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.shared-task-doc .example-table th {
  width: 14rem;
  background: #f3f0ec;
  color: var(--ink);
  font-weight: 700;
}

.shared-task-doc .example-table tbody tr:nth-child(even) td {
  background: rgba(30, 77, 92, 0.03);
}

.json-output {
  margin: 0 0 1rem;
  padding: 0.9rem 1rem;
  max-width: 72rem;
  background: #f3f0eb;
  border: 1.5px solid #a9a196;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  overflow-x: auto;
}