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

:root {
  color-scheme: dark;
  --bg: #0d0d0f;
  --bg-deep: #07070a;
  --surface: rgba(22, 22, 27, 0.68);
  --surface-strong: rgba(15, 15, 19, 0.94);
  --text: #f5f5f7;
  --muted: #a5a5ad;
  --dim: #70717a;
  --accent: #55c9ff;
  --violet: #a989ff;
  --green: #72e5bd;
  --border: rgba(255, 255, 255, 0.12);
  --border-soft: rgba(255, 255, 255, 0.07);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.36);
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --header-height: 64px;
  --container: 1120px;
  --gutter: 24px;
}

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

html {
  scroll-behavior: smooth;
  scrollbar-color: rgba(255, 255, 255, 0.22) transparent;
  scrollbar-width: thin;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family:
    "Inter Local", -apple-system, BlinkMacSystemFont, "SF Pro Display",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  background: rgba(85, 201, 255, 0.3);
  color: #ffffff;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
  letter-spacing: 0;
}

img,
svg {
  display: block;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 12px;
  z-index: 200;
  padding: 9px 12px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--surface-strong);
  color: var(--text);
  transform: translateY(-150%);
  transition: transform 200ms var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  pointer-events: none;
  background: var(--bg);
}

.atmosphere__color {
  position: absolute;
  inset: -16%;
  opacity: 0.78;
  background:
    radial-gradient(
      ellipse at 0% 17%,
      rgba(61, 142, 255, 0.34) 0%,
      rgba(35, 93, 177, 0.14) 22%,
      transparent 47%
    ),
    radial-gradient(
      ellipse at 103% 68%,
      rgba(142, 77, 255, 0.3) 0%,
      rgba(92, 48, 180, 0.12) 24%,
      transparent 49%
    ),
    radial-gradient(
      ellipse at 52% 108%,
      rgba(69, 217, 161, 0.16) 0%,
      transparent 42%
    );
  transform: translate3d(0, 0, 0) scale(1.02);
  will-change: transform, opacity;
}

.atmosphere__shade {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 8, 0.24);
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(12, 12, 16, 0.68);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

.nav-shell {
  width: min(100%, calc(var(--container) + (var(--gutter) * 2)));
  height: var(--header-height);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #ffffff;
  font-size: 17px;
  font-weight: 720;
  white-space: nowrap;
  transition: color 260ms var(--ease);
}

.brand-link:hover {
  color: var(--accent);
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: 30px;
}

.nav-link {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--muted);
  font-size: 14px;
  font-weight: 520;
  transition: color 260ms var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 5px;
  left: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 260ms var(--ease);
}

.nav-link:hover,
.nav-link[aria-current="location"] {
  color: var(--text);
}

.nav-link[aria-current="location"]::after,
.nav-link:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-button {
  width: 42px;
  height: 42px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
  transition:
    border-color 260ms var(--ease),
    background-color 260ms var(--ease);
}

.menu-button:hover {
  border-color: rgba(85, 201, 255, 0.46);
  background: rgba(85, 201, 255, 0.08);
}

.menu-button svg {
  width: 20px;
  height: 20px;
}

.menu-button .icon-close,
.menu-button[aria-expanded="true"] .icon-menu {
  display: none;
}

.menu-button[aria-expanded="true"] .icon-close {
  display: block;
}

.mobile-panel {
  margin: 0 var(--gutter) 12px;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(18, 18, 23, 0.88);
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

.mobile-panel[hidden] {
  display: none;
}

.mobile-panel .nav-link {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  border-radius: 6px;
}

.mobile-panel .nav-link::after {
  display: none;
}

.mobile-panel .nav-link:hover,
.mobile-panel .nav-link[aria-current="location"] {
  background: rgba(255, 255, 255, 0.05);
}

main {
  display: block;
}

.container {
  width: min(100%, calc(var(--container) + (var(--gutter) * 2)));
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.content-section {
  padding: 104px 0;
}

.section-heading {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 70px;
}

.section-heading__index {
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.section-heading__line {
  width: 58px;
  height: 1px;
  background: rgba(255, 255, 255, 0.3);
}

.section-heading h2 {
  color: var(--text);
  font-size: 15px;
  font-weight: 620;
}

.friend-grid {
  display: grid;
  gap: 14px;
}

.friend-card {
  min-height: 156px;
  padding: 24px;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 18px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.025);
  transition:
    translate 260ms var(--ease),
    border-color 260ms var(--ease),
    background-color 260ms var(--ease);
}

.friend-card:hover {
  translate: 0 -3px;
  border-color: rgba(114, 229, 189, 0.44);
  background: rgba(114, 229, 189, 0.045);
}

.friend-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(114, 229, 189, 0.34);
  border-radius: 50%;
  color: var(--green);
  font-size: 14px;
  font-weight: 760;
}

.friend-meta {
  min-width: 0;
}

.friend-meta strong,
.friend-meta span {
  display: block;
  overflow-wrap: anywhere;
}

.friend-meta strong {
  color: #ffffff;
  font-size: 20px;
  font-weight: 670;
}

.friend-meta span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.friend-arrow {
  width: 21px;
  height: 21px;
  color: var(--dim);
  transition:
    color 260ms var(--ease),
    transform 260ms var(--ease);
}

.friend-card:hover .friend-arrow {
  color: var(--green);
  transform: translate(2px, -2px);
}

.site-footer {
  position: relative;
  padding: 118px var(--gutter) 32px;
  overflow: hidden;
  border-top: 1px solid var(--border-soft);
  background: rgba(4, 4, 7, 0.58);
}

.footer-inner {
  width: min(100%, var(--container));
  margin: 0 auto;
}

.motto {
  max-width: 900px;
  color: #ffffff;
  font-size: 38px;
  font-weight: 680;
  line-height: 1.32;
  text-wrap: balance;
}

.footer-rule {
  width: 100%;
  height: 1px;
  margin: 86px 0 24px;
  background: var(--border-soft);
}

.copyright {
  color: var(--dim);
  font-size: 12px;
  font-weight: 520;
  text-align: center;
}

.js .reveal {
  opacity: 0;
  transform: translateY(28px);
}

.js:not(.motion-ready) .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity 800ms var(--ease),
    transform 800ms var(--ease);
}

@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
  .site-header,
  .mobile-panel {
    background: var(--surface-strong);
  }
}

@media (min-width: 700px) {
  :root {
    --gutter: 40px;
    --header-height: 68px;
  }

  .content-section {
    padding: 132px 0;
  }

  .section-heading {
    margin-bottom: 92px;
  }

  .friend-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .motto {
    font-size: 58px;
  }
}

@media (min-width: 960px) {
  .desktop-nav {
    display: flex;
    gap: 22px;
  }

  .menu-button,
  .mobile-panel {
    display: none;
  }
}

@media (min-width: 1100px) {
  :root {
    --gutter: 48px;
  }

  .content-section {
    padding: 154px 0;
  }
}

@media (max-width: 699px) {
  .no-js .site-header {
    position: relative;
  }

  .no-js .menu-button {
    display: none;
  }

  .no-js .mobile-panel[hidden] {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
  }
}