:root {
  --bg: #f5f5f3;
  --bg-soft: #fbfbfa;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --text: #111318;
  --muted: #59606d;
  --line: rgba(17, 19, 24, 0.1);
  --line-soft: rgba(17, 19, 24, 0.06);
  --primary: #111318;
  --secondary: #3f658d;
  --accent: #dfe6ee;
  --shadow: 0 24px 60px rgba(17, 19, 24, 0.08);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --max-width: 1120px;
  --reading-width: 70ch;
  --header-height: 80px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Aptos", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(223, 230, 238, 0.75), transparent 28%),
    radial-gradient(circle at 100% 0, rgba(63, 101, 141, 0.08), transparent 24%),
    linear-gradient(180deg, #f7f7f5 0%, #f4f5f3 100%);
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(17, 19, 24, 0.018) 1px, transparent 1px), linear-gradient(90deg, rgba(17, 19, 24, 0.018) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.18), transparent 76%);
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

code,
pre,
.timeline-index,
.eyebrow,
.record-meta span,
.tag-list li,
.pill,
.brand-copy span {
  font-family: "Cascadia Code", "Consolas", monospace;
}

.page-shell {
  min-height: 100vh;
}

.container {
  width: min(var(--max-width), calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(18px);
  background: rgba(245, 245, 243, 0.84);
  border-bottom: 1px solid var(--line-soft);
}

.header-inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, #111318, #2f3d4f);
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.12);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-copy strong,
.hero-copy h1,
.section-heading h1,
.section-heading h2,
.service-card h3,
.contact-card h3,
.timeline-card h3,
.archive-copy h3,
.blog-card h3,
.footer-cta h3,
.article-shell h1,
.stat-card strong {
  font-family: "Georgia", "Times New Roman", "Songti SC", serif;
  letter-spacing: 0.01em;
}

.brand-copy strong {
  font-size: 1rem;
}

.brand-copy span {
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
}

.nav-toggle {
  display: none;
  border: 0;
  border-radius: 999px;
  padding: 0.72rem 0.95rem;
  background: var(--surface-strong);
  box-shadow: 0 10px 24px rgba(17, 19, 24, 0.06);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.site-nav a {
  padding: 0.66rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
  transition: 160ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--primary);
  background: rgba(17, 19, 24, 0.05);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pill,
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  background: rgba(17, 19, 24, 0.04);
  color: var(--muted);
  font-size: 0.72rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 46px;
  padding: 0.8rem 1.18rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: 160ms ease;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, #111318, #2b3a4b);
  box-shadow: 0 16px 28px rgba(17, 19, 24, 0.14);
}

.button-primary:hover,
.button-secondary:hover {
  transform: translateY(-1px);
}

.button-secondary {
  color: var(--primary);
  border-color: rgba(17, 19, 24, 0.12);
  background: rgba(255, 255, 255, 0.72);
}

.hero {
  padding: 4rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 1.3rem;
  align-items: stretch;
}

.hero-copy,
.hero-panel,
.section-card,
.article-shell,
.service-card,
.contact-card,
.timeline-card,
.archive-card,
.blog-card,
.empty-card {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 3rem;
  border-radius: 34px;
}

.hero-copy h1 {
  margin: 1rem 0 1rem;
  font-size: clamp(2.7rem, 4.1vw, 4.8rem);
  line-height: 1.04;
  max-width: 11ch;
}

.hero-copy p,
.section-heading p,
.service-card p,
.contact-card p,
.timeline-card p,
.archive-copy p,
.blog-card p,
.footer-card p,
.article-shell p,
.article-shell li {
  max-width: var(--reading-width);
}

.hero-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.eyebrow {
  display: inline-flex;
  font-size: 0.72rem;
  color: var(--secondary);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.8rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 2rem;
}

.stat-card {
  padding: 1.25rem 1.2rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line-soft);
}

.stat-card strong {
  display: block;
  font-size: 2rem;
  margin-bottom: 0.15rem;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.9rem;
}

.hero-panel {
  border-radius: 30px;
  overflow: hidden;
  display: grid;
  grid-template-rows: 1.15fr auto;
}

.hero-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-panel-copy {
  padding: 1.3rem 1.4rem 1.5rem;
  background: linear-gradient(180deg, rgba(17, 19, 24, 0.01), rgba(17, 19, 24, 0.04));
}

.hero-panel-copy strong {
  display: block;
  margin-bottom: 0.4rem;
}

.section {
  padding: 1.7rem 0 1.15rem;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1.25rem;
  margin-bottom: 1.2rem;
}

.section-heading h1,
.section-heading h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.95rem, 2.2vw, 3rem);
  line-height: 1.15;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
}

.section-card {
  padding: 1.6rem;
  border-radius: 30px;
}

.grid-3,
.grid-2,
.contact-grid,
.blog-grid,
.timeline-grid,
.archive-summary-grid {
  display: grid;
  gap: 1rem;
}

.grid-3,
.archive-summary-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-2,
.contact-grid,
.timeline-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.blog-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.service-card,
.contact-card,
.timeline-card,
.blog-card,
.empty-card {
  padding: 1.45rem;
  border-radius: 24px;
}

.service-card h3,
.contact-card h3,
.timeline-card h3,
.archive-copy h3,
.blog-card h3,
.empty-card h3 {
  margin: 0 0 0.55rem;
  font-size: 1.22rem;
}

.service-card p,
.contact-card p,
.timeline-card p,
.blog-card p,
.empty-card p,
.list li {
  color: var(--muted);
}

.list {
  margin: 0.95rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.92rem;
}

.list li + li {
  margin-top: 0.48rem;
}

.tag-list,
.meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.tag-list li,
.meta-list li {
  padding: 0.32rem 0.62rem;
  border-radius: 6px;
  border: 1px solid rgba(17, 19, 24, 0.16);
  background: transparent;
  color: var(--muted);
  font-size: 0.78rem;
}

.split-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.86fr);
  gap: 1.15rem;
  align-items: stretch;
}

.split-card img,
.contact-card img,
.archive-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.archive-list {
  display: grid;
  gap: 1rem;
}

.archive-card {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1.15rem;
  padding: 1.2rem;
  border-radius: 28px;
}

.archive-card img {
  border-radius: 20px;
  min-height: 220px;
}

.archive-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.record-meta {
  display: grid;
  gap: 0.45rem;
  margin-top: 0.95rem;
}

.record-meta span {
  display: inline-flex;
  width: fit-content;
  max-width: 100%;
  padding: 0.4rem 0.58rem;
  border: 1px solid rgba(17, 19, 24, 0.08);
  border-radius: 8px;
  background: rgba(17, 19, 24, 0.02);
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.01em;
}

.timeline-grid-connected {
  position: relative;
  gap: 1.2rem;
}

.timeline-grid-connected::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: rgba(17, 19, 24, 0.12);
}

.timeline-card {
  position: relative;
  padding-left: 2.5rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid var(--line-soft);
  box-shadow: none;
}

.timeline-card::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 1.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid rgba(17, 19, 24, 0.25);
}

.timeline-index {
  display: inline-block;
  margin-bottom: 0.6rem;
  color: var(--secondary);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
}

.qr-box {
  padding: 1.1rem;
  border-radius: 22px;
  border: 1px solid rgba(17, 19, 24, 0.08);
  background: linear-gradient(180deg, #fff, #f6f8fb);
}

.qr-box img {
  max-width: 230px;
  margin: 0 auto;
}

.qr-box p {
  margin: 0.9rem 0 0;
  text-align: center;
}

.muted-note {
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer {
  padding: 2.2rem 0 3rem;
}

.footer-card {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) auto;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: 30px;
  background: linear-gradient(180deg, rgba(17, 19, 24, 0.98), rgba(29, 36, 46, 0.96));
  color: #f3f5f8;
  box-shadow: var(--shadow);
}

.footer-card p {
  margin: 0.42rem 0 0;
  color: rgba(243, 245, 248, 0.72);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.article-shell {
  width: min(900px, calc(100% - 2rem));
  margin: 3rem auto;
  padding: 2.6rem;
  border-radius: 30px;
}

.article-shell h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(2.1rem, 4vw, 3rem);
}

.article-shell .article-meta {
  margin: 0 0 1.4rem;
  color: var(--muted);
}

.article-shell h2 {
  margin-top: 1.7rem;
}

.article-shell pre {
  overflow: auto;
  padding: 1rem;
  border-radius: 18px;
  background: #121722;
  color: #eef2f7;
}

.article-shell blockquote {
  margin: 1.2rem 0;
  padding: 0.8rem 1rem;
  border-left: 3px solid var(--secondary);
  background: rgba(63, 101, 141, 0.08);
}

.empty-card {
  grid-column: 1 / -1;
}

@media (max-width: 1080px) {
  .hero-grid,
  .split-card,
  .archive-card,
  .footer-card,
  .grid-3,
  .grid-2,
  .contact-grid,
  .blog-grid,
  .timeline-grid,
  .archive-summary-grid {
    grid-template-columns: 1fr;
  }

  .archive-card img {
    min-height: 280px;
  }

  .header-actions .pill {
    display: none;
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 72px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
    padding: 0.85rem;
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    width: 100%;
  }

  .hero-copy,
  .section-card,
  .article-shell,
  .archive-card,
  .footer-card,
  .service-card,
  .contact-card,
  .timeline-card {
    padding: 1.35rem;
  }

  .hero-copy h1 {
    max-width: none;
  }

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

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

  .footer-bottom {
    flex-direction: column;
  }

  .timeline-grid-connected::before {
    left: 13px;
  }
}