* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  --page-bg: #f3f1ec;
  --card-bg: rgba(255, 255, 255, 0.94);
  --text-primary: #26231f;
  --text-secondary: #5f574d;
  --text-muted: #857b70;
  --line: rgba(122, 108, 89, 0.16);
  --accent: #8a5a2b;
  --accent-soft: rgba(138, 90, 43, 0.08);
  --shadow: 0 18px 40px rgba(70, 55, 37, 0.08);
}

html {
  background:
    radial-gradient(circle at top left, rgba(184, 144, 102, 0.15), transparent 28%),
    radial-gradient(circle at top right, rgba(93, 121, 108, 0.12), transparent 22%),
    linear-gradient(180deg, #f6f2ea 0%, #f2eee8 100%);
}

body {
  margin: 0;
  color: var(--text-primary);
  font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "PingFang SC", "Microsoft YaHei", serif;
  line-height: 1.75;
  background: transparent;
}

body.lang-en {
  font-family: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, serif;
}

.shell {
  width: min(920px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.hero {
  padding: 32px 28px 24px;
  border-bottom: 1px solid var(--line);
  text-align: center;
  background:
    linear-gradient(135deg, rgba(138, 90, 43, 0.12), transparent 56%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.76));
}

.title {
  margin: 0;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.subtitle {
  margin: 14px auto 0;
  max-width: 760px;
  font-size: 15px;
  color: var(--text-secondary);
}

.meta {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.meta-item {
  padding: 10px 14px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--text-secondary);
  font-size: 13px;
}

.content {
  padding: 28px;
}

.section {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child {
  border-bottom: 0;
  padding-bottom: 8px;
}

.section-title {
  margin: 0 0 16px;
  font-size: 24px;
  line-height: 1.35;
}

.block {
  margin-bottom: 18px;
}

.block:last-child {
  margin-bottom: 0;
}

.block-title {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
}

.paragraph {
  margin: 0 0 10px;
  color: var(--text-secondary);
  font-size: 15px;
}

.paragraph:last-child {
  margin-bottom: 0;
}

.list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.list-item {
  position: relative;
  margin: 0 0 10px;
  padding-left: 20px;
  color: var(--text-secondary);
  font-size: 15px;
}

.list-item:last-child {
  margin-bottom: 0;
}

.list-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, #9f6d3c, #6f8f82);
}

@media (max-width: 640px) {
  .shell {
    width: 100%;
    padding: 0;
  }

  .card {
    border-radius: 0;
    border-left: 0;
    border-right: 0;
    min-height: 100vh;
  }

  .hero,
  .content {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero {
    padding-top: 24px;
  }

  .title {
    font-size: 28px;
  }

  .section-title {
    font-size: 21px;
  }

  .paragraph,
  .list-item {
    font-size: 14px;
  }
}