@font-face {
  font-family: "Portal Inter";
  src: url("fonts/inter-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Portal Noto Sans SC";
  src: url("fonts/noto-sans-sc.woff2") format("woff2");
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  unicode-range: U+2E80-2FFF, U+3000-303F, U+3400-9FFF, U+FF00-FFEF;
}

:root {
  color-scheme: light;
  --background: #f7f9fd;
  --ink: #172338;
  --muted: #52617a;
  --line: #e1e7f1;
  --paper: #fff;
  --accent: #3858be;
  --accent-strong: #2847a7;
  font-family: "Portal Inter", "Portal Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--background);
  color: var(--ink);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(ellipse 42rem 27rem at 76% 7rem, #edf2ff 0%, transparent 100%);
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--paper);
  transform: translateY(-200%);
}
.skip-link:focus { transform: translateY(0); }
.shell { width: min(1040px, calc(100% - 88px)); margin: 0 auto; }
.masthead {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 76px;
  border-bottom: 1px solid var(--line);
}
.wordmark { display: inline-flex; align-items: center; gap: 11px; font-size: 14px; font-weight: 650; letter-spacing: 0.035em; }
.wordmark-divider { margin-inline: 7px; color: #647590; font-weight: 400; }
.masthead-label { color: var(--muted); font-size: 13px; letter-spacing: 0.035em; }
.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(230px, 368px);
  align-items: center;
  gap: 36px;
  padding: 64px 0 56px;
}
.kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 620;
  letter-spacing: 0.14em;
}
.kicker-dot { width: 6px; height: 6px; border-radius: 50%; background: #6682d9; }
h1 { margin: 0; font-size: clamp(43px, 5.7vw, 66px); line-height: 1.18; letter-spacing: -0.014em; font-weight: 650; }
.intro-description { margin: 19px 0 0; color: var(--muted); font-size: clamp(15px, 1.5vw, 17px); line-height: 1.8; letter-spacing: 0.015em; }
.index-art { width: 100%; height: auto; }
.section-heading { display: flex; justify-content: space-between; align-items: baseline; margin: 0 0 13px; padding: 0 2px; }
.section-heading h2 { margin: 0; font-size: 16px; font-weight: 600; letter-spacing: 0.025em; }
.site-count { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.site-list { display: grid; gap: 10px; padding: 0; margin: 0; list-style: none; }
.site-link {
  display: grid;
  grid-template-columns: 24px 52px minmax(0, 1fr) 38px;
  align-items: center;
  gap: 18px;
  min-height: 114px;
  padding: 16px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper);
  box-shadow: 0 2px 5px #24427305;
  transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.site-link--research { --icon-bg: #eaf0ff; --icon-ink: #415fc4; }
.site-link--media { --icon-bg: #f0edff; --icon-ink: #6251ab; }
.site-link--server { --icon-bg: #e9f3ff; --icon-ink: #326594; }
.site-number { color: var(--muted); font-size: 12px; font-variant-numeric: tabular-nums; }
.site-icon, .site-arrow { display: grid; place-items: center; aspect-ratio: 1; }
.site-icon { border-radius: 13px; background: var(--icon-bg); color: var(--icon-ink); }
.site-icon svg { width: 25px; height: 25px; }
.site-copy { display: grid; gap: 4px; min-width: 0; }
.site-copy strong { font-size: 21px; line-height: 1.35; letter-spacing: -0.012em; font-weight: 620; }
.site-description { color: var(--muted); font-size: 14px; line-height: 1.6; }
.site-url {
  margin-top: 1px;
  color: var(--accent);
  font-size: 12px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}
.site-link:hover .site-url, .site-link:focus-visible .site-url {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}
.site-arrow { color: var(--accent); border: 1px solid var(--line); border-radius: 50%; transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease; }
.site-arrow svg { width: 17px; height: 17px; }
.site-icon svg, .site-arrow svg { stroke: currentColor; stroke-width: 1.55; stroke-linecap: round; stroke-linejoin: round; }
.site-link:hover, .site-link:focus-visible { border-color: #b2c2ed; box-shadow: 0 5px 20px #294a9410; }
.site-link:hover .site-arrow, .site-link:focus-visible .site-arrow { background: var(--accent-strong); border-color: var(--accent-strong); color: white; }
footer { display: flex; justify-content: space-between; margin-top: 34px; padding: 18px 2px 27px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }

@media (max-width: 680px) {
  .shell { width: calc(100% - 40px); }
  .masthead { min-height: 65px; }
  .intro { grid-template-columns: minmax(0, 1fr) 135px; gap: 12px; padding: 43px 0 38px; }
  .kicker { font-size: 9px; letter-spacing: 0.06em; margin-bottom: 12px; }
  h1 { font-size: clamp(34px, 8vw, 52px); }
  .intro-description { margin-top: 13px; font-size: 14px; }
  .site-link { grid-template-columns: 42px minmax(0, 1fr) 33px; gap: 12px; padding: 15px 13px; min-height: 101px; border-radius: 13px; }
  .site-icon { border-radius: 10px; }
  .site-icon svg { width: 22px; height: 22px; }
  .site-number { display: none; }
  .site-copy strong { font-size: 18px; }
  .site-description { font-size: 12.5px; }
  footer { margin-top: 25px; }
}

@media (max-width: 400px) {
  .intro { grid-template-columns: minmax(0, 1fr) 100px; }
  .shell { width: calc(100% - 32px); }
}

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