:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #5f6b7a;
  --line: rgba(17, 24, 39, 0.12);
  --panel: #ffffff;
  --paper: #f5f7fb;
  --charcoal: #090d13;
  --navy: #101b2c;
  --blue: #66a3ff;
  --cyan: #2fd3c7;
  --gold: #c7a45b;
  --gold-soft: #f0dcad;
  --white: #ffffff;
  --radius: 8px;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(17, 24, 39, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(17, 24, 39, 0.035) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, black 18%, black 70%, transparent);
  z-index: -1;
}

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

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

p, h1, h2, h3 { margin-top: 0; }

p { color: var(--muted); }

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--white);
  color: var(--ink);
  border-radius: 6px;
}

.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(9, 13, 19, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
}

.navbar {
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-weight: 700;
  letter-spacing: 0;
  white-space: nowrap;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(199, 164, 91, 0.72);
  border-radius: 8px;
  color: var(--gold-soft);
  background: linear-gradient(135deg, rgba(199, 164, 91, 0.22), rgba(102, 163, 255, 0.14));
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
}

.nav-links a { transition: color 160ms ease; }
.nav-links a:hover { color: var(--white); }

.hero {
  position: relative;
  min-height: 86svh;
  isolation: isolate;
  overflow: hidden;
  background: var(--charcoal);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% center;
  filter: saturate(0.94) contrast(1.03);
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 78% 28%, rgba(102, 163, 255, 0.18), transparent 34%),
    linear-gradient(90deg, rgba(9, 13, 19, 0.96) 0%, rgba(9, 13, 19, 0.84) 38%, rgba(9, 13, 19, 0.38) 74%, rgba(9, 13, 19, 0.72) 100%),
    linear-gradient(180deg, rgba(9, 13, 19, 0.3), rgba(9, 13, 19, 0.72));
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 104px 24px 64px;
  min-height: calc(86svh - 69px);
  display: grid;
  align-items: center;
}

.hero-copy {
  width: min(720px, 100%);
  color: var(--white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 22px;
  color: var(--gold-soft);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--gold);
}

.hero h1 {
  margin: 0;
  font-size: clamp(48px, 8vw, 104px);
  line-height: 0.95;
  letter-spacing: 0;
}

.hero-subtitle {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 650;
  letter-spacing: 0;
}

.hero-description {
  max-width: 650px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 700;
  font-size: 14px;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

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

.button-primary {
  background: var(--gold);
  color: #131007;
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.22);
  color: var(--white);
  background: rgba(255, 255, 255, 0.06);
}

.signal-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  transform: translateY(-50%);
}

.signal {
  min-height: 118px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  box-shadow: 0 18px 44px rgba(17, 24, 39, 0.08);
}

.signal:first-child { border-radius: 8px 0 0 8px; }
.signal:last-child { border-radius: 0 8px 8px 0; }

.signal strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
}

.signal span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 82px 24px;
}

.section.compact { padding-top: 36px; }

.section-header {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.48fr);
  gap: 42px;
  align-items: end;
  margin-bottom: 36px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--gold);
  font-weight: 750;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section h2 {
  margin-bottom: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-lede {
  margin: 0;
  font-size: 17px;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.theme-card,
.article-card,
.method-step,
.contact-panel,
.article-shell {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  border-radius: var(--radius);
}

.theme-card {
  min-height: 235px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.theme-number {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.theme-card h3,
.article-card h3,
.method-step h3 { margin-bottom: 10px; }

.theme-card p,
.article-card p,
.method-step p { margin-bottom: 0; }

.articles-band {
  background: linear-gradient(180deg, rgba(16, 27, 44, 0.98), rgba(9, 13, 19, 0.98));
  color: var(--white);
}

.articles-band .section h2 { color: var(--white); }
.articles-band .section-lede { color: rgba(255, 255, 255, 0.68); }

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.article-card {
  min-height: 310px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.13);
  color: var(--white);
}

.article-card time,
.article-card .tag {
  color: var(--gold-soft);
  font-size: 13px;
  font-weight: 700;
}

.article-card h3 {
  margin-top: 18px;
  color: var(--white);
  font-size: 22px;
  line-height: 1.22;
}

.article-card p { color: rgba(255, 255, 255, 0.68); }

.article-card a {
  margin-top: auto;
  color: var(--white);
  font-weight: 800;
}

.timeline {
  display: grid;
  gap: 18px;
  border-left: 1px solid rgba(17, 24, 39, 0.18);
  padding-left: 26px;
}

.timeline-item {
  position: relative;
  padding-bottom: 8px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 6px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 5px rgba(199, 164, 91, 0.16);
}

.timeline-item h3 { margin-bottom: 8px; }
.timeline-item p { margin-bottom: 0; max-width: 760px; }

.method-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.method-step {
  padding: 24px;
  min-height: 210px;
}

.method-step span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 22px;
  border-radius: 8px;
  color: var(--charcoal);
  background: var(--gold-soft);
  font-weight: 900;
}

.contact-section {
  padding-bottom: 92px;
}

.contact-panel {
  padding: 38px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  background:
    linear-gradient(135deg, rgba(102, 163, 255, 0.12), rgba(47, 211, 199, 0.06)),
    var(--white);
}

.contact-panel h2 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 46px);
}

.contact-panel p { max-width: 700px; margin-bottom: 0; }

.footer {
  background: var(--charcoal);
  color: rgba(255, 255, 255, 0.62);
  padding: 30px 24px;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
}

.footer a { color: var(--white); }

.article-page {
  background: var(--paper);
}

.article-hero {
  background: var(--charcoal);
  color: var(--white);
  padding: 72px 24px 78px;
}

.article-hero-inner {
  max-width: 900px;
  margin: 0 auto;
}

.article-hero .meta {
  color: var(--gold-soft);
  font-size: 14px;
  font-weight: 750;
}

.article-hero h1 {
  margin: 18px 0;
  font-size: clamp(38px, 6vw, 72px);
  line-height: 1.04;
  letter-spacing: 0;
}

.article-hero p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 19px;
}

.article-shell {
  max-width: 900px;
  margin: -38px auto 80px;
  padding: 42px;
}

.article-shell h2 {
  margin: 34px 0 12px;
  font-size: 28px;
  line-height: 1.2;
}

.article-shell p,
.article-shell li {
  color: #3d4857;
  font-size: 17px;
}

.article-shell ul {
  padding-left: 22px;
}

.article-shell blockquote {
  margin: 30px 0;
  padding: 18px 22px;
  border-left: 3px solid var(--gold);
  background: rgba(199, 164, 91, 0.08);
  color: #293241;
}

.back-link {
  display: inline-flex;
  margin-top: 28px;
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 980px) {
  .section-header,
  .contact-panel {
    grid-template-columns: 1fr;
  }

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

  .article-grid,
  .signal-row {
    grid-template-columns: 1fr;
  }

  .signal-row { transform: translateY(-32px); }
  .signal:first-child,
  .signal:last-child { border-radius: 8px; }
  .signal { border-radius: 8px; }
}

@media (max-width: 720px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero { min-height: 84svh; }

  .hero-inner {
    padding: 72px 18px 56px;
    min-height: calc(84svh - 96px);
  }

  .hero h1 { font-size: clamp(44px, 15vw, 68px); }

  .hero-subtitle { font-size: 24px; }

  .hero-description { font-size: 16px; }

  .signal-row,
  .section { padding-left: 18px; padding-right: 18px; }

  .section { padding-top: 64px; padding-bottom: 64px; }

  .theme-grid,
  .method-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .theme-card,
  .method-step,
  .article-card {
    min-height: auto;
  }

  .contact-panel { padding: 28px; }

  .article-shell {
    margin-left: 18px;
    margin-right: 18px;
    padding: 28px;
  }
}