/* ============================================================
   G 的介绍站 · 共用基底
   ============================================================ */
:root {
  --paper: #f3ecdf;
  --paper-2: #e8dfcf;
  --ink: #171714;
  --ink-soft: #37362f;
  --orange: #ff5b32;
  --orange-deep: #e33e16;
  --blue: #2947ff;
  --yellow: #ffd447;
  --mint: #a8e8d5;
  --coral: #ff8e7f;
  --line: rgba(23, 23, 20, 0.18);
  --line-strong: rgba(23, 23, 20, 0.7);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --font-display: "Arial Black", "Impact", "Haettenschweiler",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Mono", Consolas,
    "Liberation Mono", monospace;
  --page-gutter: clamp(18px, 4.5vw, 64px);
  --max-wide: 1320px;
  --shadow-hard: 10px 10px 0 var(--ink);
}

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

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

body {
  margin: 0;
  min-width: 280px;
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

p,
h1,
h2,
h3,
h4,
ul,
ol,
figure,
blockquote {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

::selection {
  background: var(--orange);
  color: #fff;
}

:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.grain {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: 0.2;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.32'/%3E%3C/svg%3E");
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.mono {
  font-family: var(--font-mono);
}

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

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---- 备案页脚（全站共用） ---- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: 38px var(--page-gutter) calc(30px + env(safe-area-inset-bottom));
}

.footer-inner {
  width: min(100%, var(--max-wide));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: -0.03em;
}

.footer-brand span {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(243, 236, 223, 0.55);
  border-radius: 50%;
  font-size: 19px;
  transform: rotate(-7deg);
}

.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  color: rgba(243, 236, 223, 0.64);
  font-size: 11px;
  line-height: 1.8;
  text-align: right;
}

.footer-meta a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-meta a:hover {
  color: var(--yellow);
}

.beian {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.beian img {
  width: 12px;
  height: 12px;
  filter: grayscale(1) brightness(2.1);
}

@media (max-width: 620px) {
  .footer-inner {
    align-items: flex-start;
  }

  .footer-meta {
    align-items: flex-start;
    text-align: left;
  }

  .beian {
    justify-content: flex-start;
  }
}

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

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

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