:root {
  --bg: #14110f;
  --ink: #f6efe8;
  --ink-muted: rgba(246, 239, 232, 0.72);
  --accent: #ff7a2f;
  --font-display: "Syne", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --max: 1080px;
  --header-h: 72px;
}

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  font-family: var(--font-body);
  background:
    radial-gradient(1200px 700px at 78% -10%, rgba(255, 122, 47, 0.22), transparent 55%),
    radial-gradient(900px 520px at 0% 20%, rgba(255, 170, 80, 0.1), transparent 50%),
    linear-gradient(180deg, #1a1410 0%, var(--bg) 40%, #0f0d0c 100%);
  line-height: 1.6;
}

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

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

.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.site-header,
main,
.site-footer {
  position: relative;
  z-index: 1;
}

.site-header {
  height: var(--header-h);
  display: flex;
  align-items: center;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.notice {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem 1.5rem 3rem;
  max-width: 36rem;
  margin: 0 auto;
}

.notice h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.6rem, 4.5vw, 2.1rem);
  letter-spacing: 0.06em;
}

.notice p {
  margin: 1.1rem 0 0;
  color: var(--ink-muted);
  font-size: 1.02rem;
}

.site-footer {
  padding: 2rem 1.5rem 2.5rem;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  color: rgba(246, 239, 232, 0.5);
  font-size: 0.9rem;
}

.footer-sep {
  opacity: 0.5;
}

.beian {
  color: inherit;
  transition: color 0.2s ease;
}

.beian:hover {
  color: var(--ink-muted);
}