* {
  box-sizing: border-box;
}

html {
  background: #071719;
  color: #f8fafc;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(180deg, rgba(0,0,0,.46), rgba(0,0,0,.72)),
    url("/og-cover.jpg") center / cover fixed;
}

a {
  color: inherit;
}

.page {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 56px;
}

.top {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0 26px;
}

.brand {
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-size: clamp(1.05rem, 3vw, 1.35rem);
  letter-spacing: .12em;
  text-shadow: 0 2px 8px rgba(0,0,0,.8);
  text-decoration: none;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.links a,
.button {
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 4px;
  background: rgba(255,255,255,.08);
  padding: 8px 11px;
  color: rgba(255,255,255,.88);
  font-size: .85rem;
  text-decoration: none;
}

.hero,
.card {
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 8px;
  background: rgba(5, 12, 14, .78);
  box-shadow: 0 24px 80px rgba(0,0,0,.36);
  backdrop-filter: blur(10px);
}

.hero {
  padding: clamp(28px, 6vw, 56px);
}

.eyebrow {
  color: #7dd3fc;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
}

h1,
h2 {
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-weight: 300;
  letter-spacing: .04em;
}

h1 {
  margin: 14px 0 18px;
  font-size: clamp(2rem, 8vw, 4.6rem);
  line-height: 1.12;
  text-shadow: 0 2px 8px rgba(0,0,0,.85), 0 0 1px #000;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(1.3rem, 4vw, 2rem);
}

p,
li {
  color: rgba(255,255,255,.84);
  font-size: clamp(.98rem, 2.5vw, 1.08rem);
  line-height: 1.9;
}

strong {
  color: #fff;
}

.lead {
  max-width: 760px;
  color: rgba(255,255,255,.9);
  font-size: clamp(1.05rem, 3vw, 1.25rem);
}

.grid {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.card {
  padding: clamp(20px, 4vw, 30px);
}

.meta {
  color: rgba(255,255,255,.55);
  font-size: .85rem;
}

ul {
  padding-left: 1.25em;
}

.note {
  border-left: 3px solid #facc15;
  padding-left: 14px;
}

@media (max-width: 640px) {
  body {
    background-attachment: scroll;
  }

  .page {
    width: min(100% - 24px, 920px);
    padding-top: 18px;
  }

  .links {
    width: 100%;
  }

  .links a {
    flex: 1 1 auto;
    text-align: center;
  }
}