:root {
  color-scheme: light;
  --ink: #1c1c1a;
  --muted: #66665f;
  --paper: #f4f1e9;
  --line: rgba(28, 28, 26, 0.16);
  --warm: #e8a66d;
  --cool: #9bb9b2;
  --plain: #d8d2c5;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui,
    sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.page-shell {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.site-name {
  font-family: "Songti SC", "STSong", serif;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
}

.site-note,
.eyebrow,
.section-index,
.card-kicker,
.fragment-card time,
.site-footer {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 2fr);
  gap: 32px;
  padding: clamp(88px, 13vw, 168px) 0 clamp(100px, 14vw, 180px);
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 850px;
  margin: -0.15em 0 34px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(3rem, 7.4vw, 6.7rem);
  font-weight: 500;
  letter-spacing: -0.05em;
  line-height: 1.08;
}

.hero-copy {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.5vw, 1.16rem);
}

.fragments,
.about {
  padding: 42px 0 110px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 2fr);
  gap: 32px;
  margin-bottom: 44px;
}

.section-heading p,
.section-heading h2 {
  margin: 0;
}

.section-heading h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 500;
}

.fragment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.fragment-card {
  display: flex;
  min-height: 340px;
  flex-direction: column;
  padding: 28px;
  border: 1px solid rgba(28, 28, 26, 0.1);
  border-radius: 3px;
}

.fragment-card--warm {
  background: color-mix(in srgb, var(--warm) 52%, var(--paper));
}

.fragment-card--cool {
  background: color-mix(in srgb, var(--cool) 58%, var(--paper));
}

.fragment-card--plain {
  background: color-mix(in srgb, var(--plain) 72%, var(--paper));
}

.card-kicker {
  margin: 0 0 auto;
}

.fragment-card h3 {
  max-width: 10em;
  margin: 72px 0 18px;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(1.45rem, 2.1vw, 2rem);
  font-weight: 500;
  line-height: 1.35;
}

.fragment-card > p:not(.card-kicker) {
  margin: 0 0 38px;
  color: rgba(28, 28, 26, 0.72);
  font-size: 0.94rem;
}

.fragment-card time {
  margin-top: auto;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(0, 2fr);
  gap: 32px;
}

.about .section-heading {
  display: block;
  margin: 0;
}

.about .section-index {
  margin-bottom: 18px;
}

.about > p {
  max-width: 780px;
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(1.55rem, 3.4vw, 3rem);
  line-height: 1.52;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  padding: 30px 0 38px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .site-header {
    min-height: 70px;
  }

  .site-note {
    letter-spacing: 0.04em;
  }

  .hero,
  .section-heading,
  .about {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 30px;
    padding: 74px 0 100px;
  }

  .hero h1 {
    margin-top: 0;
    font-size: clamp(2.7rem, 13.8vw, 4.8rem);
  }

  .fragment-grid {
    grid-template-columns: 1fr;
  }

  .fragment-card {
    min-height: 280px;
  }

  .about {
    gap: 38px;
  }

  .site-footer {
    gap: 16px;
    align-items: flex-start;
    flex-direction: column;
  }
}

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