:root {
  --bg: #f3efe6;
  --bg-strong: #e5d6b8;
  --surface: rgba(255, 250, 240, 0.82);
  --surface-strong: #fffaf0;
  --ink: #1d2430;
  --ink-soft: #566072;
  --line: rgba(29, 36, 48, 0.14);
  --accent: #9f5a2d;
  --accent-deep: #5a2f17;
  --accent-soft: #f2c787;
  --shadow: 0 24px 70px rgba(52, 36, 19, 0.12);
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(159, 90, 45, 0.16), transparent 28%),
    radial-gradient(circle at left 10% bottom 20%, rgba(242, 199, 135, 0.3), transparent 30%),
    linear-gradient(180deg, #fbf7f0 0%, var(--bg) 48%, #f8f2e7 100%);
  font-family: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(29, 36, 48, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(29, 36, 48, 0.035) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), transparent 92%);
  pointer-events: none;
}

a {
  color: inherit;
}

.site-header,
.site-footer,
.hero,
.section,
.doc-shell {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  margin-top: 22px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 250, 240, 0.74);
  backdrop-filter: blur(14px);
  box-shadow: 0 12px 50px rgba(52, 36, 19, 0.08);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
}

.brand-mark {
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.brand-name {
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti SC", serif;
  font-size: 1.15rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--ink-soft);
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  background: rgba(159, 90, 45, 0.1);
  color: var(--accent-deep);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.8fr);
  gap: 28px;
  padding: 72px 0 48px;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.card,
.doc {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 42px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(159, 90, 45, 0.08);
  color: var(--accent-deep);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero h1,
.doc h1 {
  margin: 18px 0 18px;
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti SC", serif;
  line-height: 1.1;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 5.2rem);
}

.hero p {
  max-width: 42rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button {
  background: var(--accent-deep);
  color: #fff8ee;
  box-shadow: 0 16px 40px rgba(90, 47, 23, 0.22);
}

.button-secondary {
  border: 1px solid rgba(90, 47, 23, 0.18);
  background: rgba(255, 255, 255, 0.58);
  color: var(--ink);
}

.button:hover,
.button-secondary:hover,
.button:focus-visible,
.button-secondary:focus-visible {
  transform: translateY(-2px);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 28px;
  background:
    linear-gradient(160deg, rgba(255, 252, 246, 0.92), rgba(232, 213, 181, 0.72)),
    var(--surface);
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: auto -20% -32% auto;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(159, 90, 45, 0.28), transparent 62%);
}

.panel-grid {
  display: grid;
  gap: 14px;
}

.panel-item {
  position: relative;
  padding: 16px 16px 16px 18px;
  border-left: 3px solid rgba(159, 90, 45, 0.38);
  background: rgba(255, 255, 255, 0.44);
}

.panel-item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.panel-item span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.section {
  padding: 10px 0 34px;
}

.section-header {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

.section-header h2 {
  margin: 0;
  font-family: "Iowan Old Style", "Palatino Linotype", "Songti SC", serif;
  font-size: clamp(1.8rem, 4vw, 3rem);
}

.section-header p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 52rem;
}

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

.card {
  padding: 24px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 1.12rem;
}

.card p,
.card li,
.doc p,
.doc li {
  color: var(--ink-soft);
}

.card ul,
.doc ul {
  padding-left: 1.1rem;
  margin: 0;
}

.doc-shell {
  padding: 56px 0 72px;
}

.doc {
  padding: clamp(24px, 4vw, 46px);
  background: rgba(255, 252, 246, 0.9);
}

.doc h1 {
  font-size: clamp(2.3rem, 5vw, 4.2rem);
}

.doc h2 {
  margin-top: 2rem;
  margin-bottom: 0.7rem;
  font-size: 1.2rem;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.note {
  padding: 16px 18px;
  border: 1px solid rgba(159, 90, 45, 0.18);
  border-radius: 18px;
  background: rgba(242, 199, 135, 0.18);
  color: var(--accent-deep);
}

.site-footer {
  padding: 26px 0 44px;
  color: var(--ink-soft);
  font-size: 0.94rem;
}

.footer-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

@media (max-width: 960px) {
  .hero,
  .cards {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 42px;
  }
}

@media (max-width: 700px) {
  .site-header,
  .site-footer,
  .hero,
  .section,
  .doc-shell {
    width: min(calc(100% - 24px), var(--content));
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-copy,
  .hero-panel,
  .card,
  .doc {
    border-radius: 22px;
  }

  .hero-copy,
  .hero-panel,
  .doc {
    padding: 22px;
  }
}