:root {
  --bg: #f8f2de;
  --bg-2: #fff9ec;
  --panel: rgba(255, 252, 243, 0.86);
  --panel-strong: #fffef9;
  --line: rgba(16, 16, 16, 0.1);
  --line-strong: rgba(16, 16, 16, 0.18);
  --ink: #101010;
  --ink-soft: #4d4d4d;
  --brand: #f6b800;
  --brand-deep: #db9b00;
  --accent: #0b7a75;
  --shadow-lg: 0 28px 90px rgba(95, 73, 0, 0.14);
  --shadow-md: 0 16px 40px rgba(95, 73, 0, 0.12);
  --shadow-sm: 0 10px 24px rgba(34, 23, 0, 0.08);
  --radius-xl: 34px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max-width: 1240px;
  --font-main: "Alibaba PuHuiTi 3.0", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-main);
  background:
    radial-gradient(circle at top left, rgba(246, 184, 0, 0.35), transparent 20%),
    radial-gradient(circle at 85% 8%, rgba(11, 122, 117, 0.14), transparent 18%),
    linear-gradient(180deg, #fffaf0 0%, #f8f2de 48%, #fffaf4 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(16, 16, 16, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 16, 16, 0.04) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 92%);
}

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

.site-shell {
  padding: 22px 18px 36px;
}

.site-header,
.hero,
.section,
.site-footer {
  width: min(100%, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 30;
  margin-bottom: 28px;
}

.header-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  box-shadow: 0 16px 34px rgba(219, 155, 0, 0.32);
  font-size: 18px;
  font-weight: 900;
}

.brand-copy {
  display: grid;
  gap: 4px;
}

.brand-copy strong {
  font-size: 19px;
  line-height: 1;
}

.brand-copy span {
  color: var(--ink-soft);
  font-size: 12px;
}

.nav-links,
.cta-row,
.tag-row,
.footer-links,
.cross-city-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.nav-links {
  justify-content: flex-end;
}

.nav-link {
  padding: 10px 0;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--ink);
}

.hero,
.section {
  margin-bottom: 26px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  padding: 32px;
  border: 1px solid rgba(255, 255, 255, 0.76);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.95), rgba(255, 247, 225, 0.88)),
    linear-gradient(135deg, rgba(11, 122, 117, 0.05), rgba(246, 184, 0, 0.08));
  box-shadow: var(--shadow-lg);
}

.hero-network {
  background:
    radial-gradient(circle at top right, rgba(11, 122, 117, 0.12), transparent 28%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(255, 248, 230, 0.88));
}

.hero-copy h1,
.section-head h2,
.panel-card h2,
.article-section h2 {
  margin: 0;
  line-height: 1.08;
}

.hero-copy h1 {
  font-size: clamp(2.3rem, 4vw, 4.5rem);
  max-width: 14ch;
}

.hero-copy p,
.section-head p,
.panel-card p,
.article-card p,
.topic-card p,
.feature-card p,
.timeline-card p,
.city-card p,
.footer-note,
.faq-item p,
.article-section p {
  color: var(--ink-soft);
  line-height: 1.72;
}

.hero-panel,
.panel-card,
.feature-card,
.timeline-card,
.city-card,
.topic-card,
.article-card,
.signal-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: var(--shadow-sm);
}

.hero-panel,
.panel-card {
  padding: 20px;
}

.hero-panel strong,
.panel-card h2,
.feature-card strong,
.topic-card strong,
.article-card strong,
.city-card strong,
.timeline-card strong,
.faq-item strong,
.signal-card strong {
  display: block;
}

.hero-metrics,
.signal-grid,
.feature-grid,
.city-grid,
.topic-grid,
.article-grid,
.timeline {
  display: grid;
  gap: 14px;
}

.hero-metrics {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 16px;
}

.hero-metrics article,
.signal-card {
  padding: 14px;
}

.hero-metrics span,
.signal-card span,
.eyebrow,
.article-meta {
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-metrics strong {
  margin-top: 8px;
  font-size: 1rem;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 12px;
  font-weight: 800;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button-primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  box-shadow: 0 16px 34px rgba(219, 155, 0, 0.28);
}

.button-secondary {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.84);
}

.button-primary:hover,
.button-secondary:hover,
.city-card:hover,
.topic-card:hover,
.article-card:hover {
  transform: translateY(-2px);
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid rgba(16, 16, 16, 0.08);
  background: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  font-weight: 700;
}

.tag-muted {
  background: rgba(246, 184, 0, 0.12);
}

.tag-link {
  color: var(--accent);
}

.section {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-md);
}

.section-head {
  margin-bottom: 18px;
  max-width: 72ch;
}

.feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-card,
.timeline-card {
  padding: 20px;
}

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

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

.city-card,
.topic-card,
.article-card {
  padding: 18px;
}

.city-card-top,
.article-card-top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.city-en {
  color: var(--ink-soft);
  font-size: 14px;
}

.signal-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 14px;
}

.signal-card strong {
  margin-top: 8px;
  font-size: 0.98rem;
}

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

.timeline-card span {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.two-up {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.stack-list {
  display: grid;
  gap: 12px;
  padding-left: 18px;
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.62;
}

.cross-city-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid rgba(11, 122, 117, 0.16);
  background: rgba(11, 122, 117, 0.08);
  font-weight: 700;
}

.article-body {
  display: grid;
  gap: 18px;
}

.article-section {
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(16, 16, 16, 0.08);
}

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

.faq-list {
  display: grid;
  gap: 14px;
}

.faq-item {
  padding: 14px 0;
  border-bottom: 1px solid rgba(16, 16, 16, 0.08);
}

.faq-item:last-child {
  border-bottom: 0;
}

.site-footer {
  padding: 10px 0 20px;
}

.footer-panel {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(16, 16, 16, 0.08);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 1080px) {
  .hero,
  .two-up,
  .feature-grid,
  .city-grid,
  .topic-grid,
  .article-grid,
  .timeline,
  .signal-grid {
    grid-template-columns: 1fr 1fr;
  }

  .header-panel,
  .footer-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .nav-links {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .site-shell {
    padding: 14px 12px 24px;
  }

  .hero,
  .feature-grid,
  .city-grid,
  .topic-grid,
  .article-grid,
  .timeline,
  .signal-grid,
  .two-up,
  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 22px;
  }

  .header-panel {
    border-radius: 22px;
  }

  .hero-copy h1 {
    font-size: clamp(2rem, 11vw, 3rem);
  }
}