:root {
  color-scheme: light;
  --paper: #f4efe4;
  --paper-deep: #e9dfcf;
  --ink: #2d2925;
  --muted: #756b60;
  --accent: #8b3a3a;
  --accent-dark: #6d2d2d;
  --line: rgba(45, 41, 37, 0.18);
  font-family: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
}

* { box-sizing: border-box; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(circle at 15% 15%, rgba(255, 255, 255, 0.42), transparent 30%),
    linear-gradient(135deg, var(--paper) 0%, #f7f1e7 52%, var(--paper-deep) 100%);
  color: var(--ink);
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.page-shell {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding: clamp(28px, 6vw, 76px) clamp(24px, 8vw, 132px) clamp(26px, 5vw, 58px);
  overflow: hidden;
}

.page-shell::after {
  position: absolute;
  top: 0;
  right: clamp(28px, 9vw, 160px);
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--line) 20%, var(--line) 80%, transparent);
  content: "";
}

.page-mark {
  position: relative;
  z-index: 1;
  color: var(--accent);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  letter-spacing: 0.22em;
}

.page-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
  margin: auto 0;
  padding: clamp(70px, 12vh, 140px) 0;
}

.eyebrow {
  margin: 0 0 30px;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 12px;
  letter-spacing: 0.2em;
}

h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(48px, 8vw, 104px);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 1.14;
}

h1 em {
  color: var(--accent);
  font-style: normal;
}

.intro {
  max-width: 380px;
  margin: 34px 0 0;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  letter-spacing: 0.06em;
  line-height: 2;
}

.action-link {
  display: inline-flex;
  align-items: center;
  gap: 32px;
  margin-top: 54px;
  padding: 15px 0 13px;
  border-bottom: 1px solid var(--accent);
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: color 180ms ease, gap 180ms ease, border-color 180ms ease;
}

.action-link:hover,
.action-link:focus-visible {
  gap: 42px;
  border-color: var(--accent-dark);
  color: var(--accent);
  outline: none;
}

.action-arrow {
  color: var(--accent);
  font-family: Georgia, serif;
  font-size: 24px;
  line-height: 1;
}

.back-arrow { transform: scaleX(-1); }

.page-footer {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 11px;
  letter-spacing: 0.14em;
}

.footer-line {
  display: block;
  width: 44px;
  height: 1px;
  background: var(--line);
}

@media (max-width: 640px) {
  .page-shell { padding: 28px 24px 30px; }
  .page-shell::after { right: 24px; opacity: 0.45; }
  .page-content { padding: 86px 0 100px; }
  h1 { font-size: clamp(46px, 15vw, 72px); }
  .intro { max-width: 290px; }
}