/* ResOT Project Page — 样式
   仅使用系统字体，不加载任何外部资源（无 CDN、无 Web Font），
   保证在任意网络环境下都能完整、快速地渲染。 */

:root {
  --bg:          #ffffff;
  --bg-hero:     #fafbfc;
  --fg:          #1a1e24;
  --fg-soft:     #33393f;
  --muted:       #5c646d;
  --line:        #e4e7eb;
  --accent:      #14548f;
  --pill:        #23272d;
  --pill-hover:  #000000;
  --maxw:        820px;
  --maxw-hero:   960px;
  --maxw-wide:   1080px;

  color-scheme: light;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
               "Noto Sans", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--accent); }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 20px;
}
.wrap--wide { max-width: var(--maxw-wide); }
.hero .wrap { max-width: var(--maxw-hero); }

.skip-link {
  position: absolute;
  left: -9999px;
}
.skip-link:focus {
  left: 12px; top: 12px;
  z-index: 10;
  background: #fff;
  padding: .5rem .9rem;
  border: 1px solid var(--line);
  border-radius: 6px;
}

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

.hero {
  background: var(--bg-hero);
  border-bottom: 1px solid var(--line);
  padding: clamp(2.75rem, 6vw, 4.5rem) 0 clamp(2.25rem, 5vw, 3.25rem);
  text-align: center;
}

.eyebrow {
  margin: 0 0 .9rem;
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
}

.title {
  margin: 0 auto;
  max-width: 24em;
  font-size: clamp(1.6rem, 1.05rem + 2.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -.015em;
  text-wrap: balance;
}

.br-lg { display: none; }

.venue {
  margin: 1rem 0 0;
  font-size: .9375rem;
  color: var(--muted);
}

.authors {
  max-width: 46em;
  margin-inline: auto;
  margin-top: 1.5rem;
  font-size: 1.0625rem;
  line-height: 1.9;
  color: var(--fg-soft);
}
.authors a { text-decoration: none; border-bottom: 1px solid rgba(20, 84, 143, .3); }
.authors .author { display: inline-block; }
.authors a:hover { border-bottom-color: var(--accent); }
.authors .sep { color: var(--muted); }
.authors sup { font-size: .72em; padding-left: .1em; color: var(--muted); }
.authors-placeholder { color: var(--muted); font-style: italic; }

.affiliations {
  margin: .35rem 0 0;
  font-size: .9375rem;
  color: var(--muted);
}
.affiliations sup { padding-right: .15em; }

.author-notes {
  margin: .45rem 0 0;
  font-size: .875rem;
  color: var(--muted);
}

/* -------------------------------------------------------------- status -- */

.status { margin: 1.5rem 0 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  padding: .38rem .95rem;
  border: 1px solid;
  border-radius: 999px;
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.4;
}
.badge::before {
  content: "";
  flex: none;
  width: .5rem; height: .5rem;
  border-radius: 50%;
  background: currentColor;
}
.badge[data-status="coming-soon"]   { color: #5c646d; background: #f2f4f6; border-color: #e0e4e8; }
.badge[data-status="arxiv-pending"] { color: #96590f; background: #fdf5e7; border-color: #f0dfc1; }
.badge[data-status="published"]     { color: #17603a; background: #edf7f1; border-color: #cbe6d8; }

/* --------------------------------------------------------------- links -- */

.links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .6rem;
  margin-top: 1.55rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .48rem;
  padding: .55rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: .9375rem;
  font-weight: 600;
  line-height: 1.35;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease;
}
.btn svg { flex: none; width: 1em; height: 1em; }

.btn--active { background: var(--pill); color: #fff; }
.btn--active:hover, .btn--active:focus-visible { background: var(--pill-hover); }

.btn--pending {
  background: #f4f5f7;
  color: #79818b;
  border-color: var(--line);
  cursor: default;
}

.paper-note {
  max-width: 44em;
  margin: .85rem auto 0;
  font-size: .875rem;
  color: var(--muted);
}

.noscript {
  max-width: 40em;
  margin: 1.5rem auto 0;
  font-size: .9375rem;
  color: var(--muted);
}

/* -------------------------------------------------------------- teaser -- */

.teaser {
  margin: clamp(2rem, 4vw, 3rem) auto 0;
}
.teaser a {
  display: block;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}
.teaser figcaption,
.status-figure figcaption {
  margin-top: .85rem;
  font-size: .9375rem;
  color: var(--muted);
  text-align: center;
}

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

.section { margin-top: clamp(2.5rem, 5vw, 3.5rem); }

.section h2 {
  margin: 0 0 1rem;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -.005em;
  text-align: center;
}

.abstract-body {
  margin: 0;
  color: var(--fg-soft);
  line-height: 1.78;
}

.status-figure { margin: 0; }
.status-figure img {
  margin-inline: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}

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

.footer {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  padding: 1.75rem 0 2.5rem;
  border-top: 1px solid var(--line);
  text-align: center;
}
.footer-title {
  margin: 0;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--fg-soft);
}
.footer-note {
  margin: .35rem 0 0;
  font-size: .875rem;
  color: var(--muted);
}

/* --------------------------------------------------------- breakpoints -- */

@media (min-width: 760px) {
  .br-lg { display: inline; }
  .abstract-body { text-align: justify; hyphens: auto; }
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  .wrap { padding-inline: 18px; }
  .btn { padding: .5rem .9rem; font-size: .875rem; }
  .badge { font-size: .8125rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}

.nobr { white-space: nowrap; }