:root {
  --ink: #101820;
  --ink-soft: #1a2833;
  --paper: #f3efe6;
  --paper-deep: #e7e1d4;
  --gold: #a68456;
  --gold-bright: #c6a36e;
  --text: #1a242c;
  --muted: #5c6870;
  --line: rgba(16, 24, 32, 0.12);
  --white: #fbfaf7;
  --header: 76px;
  --content: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

img, svg { display: block; max-width: 100%; }

a { color: inherit; }

h1, h2, h3 {
  margin: 0;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.25;
}

p { margin: 0; }

.container {
  width: min(var(--content), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header);
  background: rgba(16, 24, 32, 0.96);
  color: var(--paper);
  border-bottom: 1px solid rgba(198, 163, 110, 0.35);
  backdrop-filter: blur(10px);
}

.header-inner,
.brand,
.site-nav,
.hero-actions,
.footer-inner {
  display: flex;
  align-items: center;
}

.header-inner {
  height: 100%;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  gap: 12px;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 32px;
  flex: none;
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-text strong {
  font-size: 18px;
  letter-spacing: 0.16em;
  font-weight: 600;
}

.brand-text small {
  color: rgba(243, 239, 230, 0.72);
  font-size: 12px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-nav { gap: 28px; }

.site-nav a {
  color: rgba(243, 239, 230, 0.88);
  text-decoration: none;
  font-size: 15px;
  letter-spacing: 0.08em;
}

.site-nav a:hover { color: var(--gold-bright); }

.nav-toggle {
  display: none;
  border: 1px solid rgba(243, 239, 230, 0.3);
  background: transparent;
  color: var(--paper);
  height: 40px;
  padding: 0 12px;
  gap: 8px;
  align-items: center;
  cursor: pointer;
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  position: relative;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 85% 10%, rgba(166, 132, 86, 0.2), transparent 46%),
    var(--paper);
  border-bottom: 1px solid var(--line);
}

.hero::after {
  content: "爻";
  position: absolute;
  right: -0.08em;
  bottom: -0.28em;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: 26rem;
  line-height: 1;
  color: rgba(16, 24, 32, 0.045);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(220px, 0.6fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - var(--header));
  padding: 72px 0;
}

.kicker,
.section-kicker {
  margin-bottom: 14px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.22em;
}

h1 {
  font-size: clamp(56px, 8vw, 92px);
  letter-spacing: 0.14em;
}

.hero-company {
  margin-top: 12px;
  font-size: 18px;
  letter-spacing: 0.12em;
}

.hero-lead,
.section-note,
.prose p {
  color: var(--muted);
}

.hero-lead {
  max-width: 38em;
  margin-top: 22px;
  font-size: 17px;
}

.hero-actions { gap: 14px; margin-top: 32px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  height: 46px;
  padding: 0 18px;
  text-decoration: none;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover { background: #243744; }

.btn-ghost {
  border-color: rgba(16, 24, 32, 0.28);
  color: var(--ink);
}

.btn-ghost:hover { border-color: var(--ink); }

.hero-mark {
  justify-self: end;
  width: min(100%, 280px);
  padding: 28px 8px 8px;
}

.yao {
  display: flex;
  justify-content: space-between;
  margin-bottom: 18px;
}

.yao i {
  display: block;
  height: 8px;
  background: var(--ink);
}

.yao-dim i { width: 46%; opacity: 0.28; }
.yao-solid i { width: 100%; background: var(--gold); }

.hero-mark p {
  margin-top: 8px;
  text-align: right;
  letter-spacing: 0.42em;
  color: var(--gold);
  font-family: "Songti SC", "STSong", "SimSun", serif;
}

.section { padding: 96px 0; }

.section h2 { font-size: clamp(32px, 4vw, 44px); }

.split {
  display: grid;
  grid-template-columns: minmax(180px, 0.7fr) minmax(0, 1.3fr);
  gap: 48px;
}

.prose p + p { margin-top: 16px; }

.fact-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.fact-list li {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.fact-list span { color: var(--muted); }

.section-ink {
  background: var(--ink);
  color: var(--paper);
}

.section-ink .section-note { color: rgba(243, 239, 230, 0.68); }

.section-note { max-width: 40em; margin-top: 16px; }

.card-grid,
.value-grid {
  display: grid;
  gap: 18px;
  margin-top: 36px;
}

.card-grid { grid-template-columns: repeat(3, 1fr); }

.card,
.value-grid article {
  padding: 28px 24px 32px;
  border: 1px solid rgba(243, 239, 230, 0.14);
  background: var(--ink-soft);
}

.card-index {
  display: block;
  margin-bottom: 28px;
  color: var(--gold-bright);
  letter-spacing: 0.14em;
  font-size: 13px;
}

.card h3,
.value-grid h3 { font-size: 28px; margin-bottom: 12px; }

.card p { color: rgba(243, 239, 230, 0.74); }

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

.value-grid article {
  background: transparent;
  border-color: var(--line);
  min-height: 180px;
}

.value-grid p { color: var(--muted); }

.section-contact { background: var(--paper-deep); }

.contact-list { margin: 0; }

.contact-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(16, 24, 32, 0.12);
}

.contact-list dt { color: var(--muted); }
.contact-list dd { margin: 0; }

.site-footer {
  background: var(--ink);
  color: var(--paper);
  border-top: 3px solid var(--gold);
}

.footer-inner {
  min-height: 148px;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 28px 0;
  text-align: center;
}

.footer-name {
  letter-spacing: 0.16em;
  font-size: 16px;
}

.footer-beian a {
  color: var(--gold-bright);
  font-size: 15px;
  letter-spacing: 0.06em;
  text-underline-offset: 4px;
}

.footer-beian a:hover { color: #e6d3ae; }

.footer-copy {
  color: rgba(243, 239, 230, 0.6);
  font-size: 13px;
}

:focus-visible {
  outline: 2px solid var(--gold-bright);
  outline-offset: 3px;
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: var(--header);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 16px;
    background: var(--ink);
    border-bottom: 1px solid rgba(198, 163, 110, 0.35);
  }

  .site-nav.is-open { display: flex; }

  .site-nav a {
    width: 100%;
    padding: 12px 0;
    border-bottom: 1px solid rgba(243, 239, 230, 0.08);
  }

  .hero-inner,
  .split,
  .card-grid,
  .value-grid {
    grid-template-columns: 1fr;
  }

  .hero-inner { min-height: auto; padding: 56px 0 48px; }

  .hero-mark { justify-self: start; width: 210px; }

  .hero::after { font-size: 14rem; }

  .brand-text small { display: none; }

  .section { padding: 72px 0; }
}

@media (max-width: 560px) {
  .container { width: min(var(--content), calc(100% - 32px)); }

  .fact-list li,
  .contact-list div { grid-template-columns: 1fr; gap: 2px; }

  .hero-actions { flex-direction: column; align-items: stretch; }
}

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