:root {
  color-scheme: light;
  --brand-primary: #0b2341;
  --brand-secondary: #168b86;
  --brand-accent: #c99a2e;
  --brand-bg: #f7faf9;
  --brand-text: #172331;
  --surface: #ffffff;
  --surface-warm: #fbfdfc;
  --muted: #5a6675;
  --line: #d9e3e6;
  --soft-blue: #eef5f7;
  --max-width: 1160px;
  --reading-width: 760px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--brand-bg);
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  margin: 0;
  color: var(--brand-text);
  font-family:
    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.72;
  letter-spacing: 0;
  background: var(--brand-bg);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

code {
  padding: 0.1em 0.3em;
  color: var(--brand-primary);
  background: var(--soft-blue);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 100;
  transform: translateY(-140%);
  padding: 8px 12px;
  color: #fff;
  background: var(--brand-primary);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 82px;
  padding: 14px clamp(18px, 5vw, 72px);
  border-bottom: 1px solid rgba(217, 227, 230, 0.9);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(14px);
}

.brand {
  flex: 0 1 268px;
  min-width: 0;
}

.brand img {
  width: min(268px, 56vw);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(12px, 2vw, 28px);
  color: var(--brand-primary);
  font-size: 0.92rem;
  font-weight: 760;
  scrollbar-width: thin;
}

.site-nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a[aria-current="page"] {
  color: var(--brand-secondary);
  border-color: var(--brand-accent);
}

.site-nav a:focus-visible,
.button:focus-visible,
.read-link:focus-visible,
.back-link:focus-visible {
  outline: 3px solid rgba(201, 154, 46, 0.42);
  outline-offset: 4px;
}

main {
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
}

.hero,
.page-hero {
  border-bottom: 1px solid var(--line);
}

.hero {
  min-height: clamp(560px, 76vh, 760px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(210px, 330px);
  align-items: center;
  gap: clamp(30px, 7vw, 92px);
  padding: 72px 0 58px;
}

.page-hero {
  padding: clamp(58px, 10vw, 120px) 0 clamp(44px, 7vw, 82px);
}

.hero-copy {
  max-width: 790px;
}

.eyebrow,
.section-label,
.meta {
  margin: 0 0 18px;
  color: var(--brand-secondary);
  font-size: 0.78rem;
  font-weight: 820;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.meta {
  color: var(--muted);
  letter-spacing: 0;
  text-transform: none;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--brand-primary);
  line-height: 1.12;
}

h1 {
  max-width: 820px;
  font-size: clamp(3rem, 7vw, 6.6rem);
  font-weight: 830;
}

.page-hero h1,
.article-header h1 {
  font-size: clamp(2.5rem, 5.5vw, 5.1rem);
}

h2 {
  font-size: clamp(1.9rem, 3.4vw, 3.2rem);
  font-weight: 780;
}

h3 {
  font-size: 1.16rem;
  font-weight: 800;
}

.lead {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(1.12rem, 2vw, 1.45rem);
}

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

.button,
.read-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--brand-primary);
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  color: #fff;
  background: var(--brand-primary);
}

.button.secondary,
.read-link {
  color: var(--brand-primary);
  background: transparent;
}

.hero-mark {
  display: flex;
  justify-content: center;
  padding: 30px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(22, 139, 134, 0.1), rgba(201, 154, 46, 0.08)),
    var(--surface);
}

.hero-mark img {
  width: min(232px, 52vw);
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: -1px 0 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.status-strip div {
  min-height: 106px;
  padding: 22px;
  background: var(--surface);
}

.status-strip strong {
  display: block;
  color: var(--brand-primary);
  font-size: 2rem;
  line-height: 1;
}

.status-strip span {
  display: block;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.section {
  padding: clamp(54px, 8vw, 96px) 0;
  border-bottom: 1px solid var(--line);
}

.intro {
  max-width: 920px;
}

.intro p:last-child {
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 1.14rem;
}

.section-heading {
  grid-column: 1 / -1;
  max-width: 760px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.category-card,
.article-row {
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand-accent);
  padding: 20px;
  background: var(--surface);
}

.category-card span {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--brand-secondary);
  font-size: 0.78rem;
  font-weight: 900;
}

.category-card h3 a,
.article-row h2 a,
.article-header a {
  text-decoration: none;
}

.category-card h3 a:hover,
.article-row h2 a:hover,
.article-header a:hover {
  color: var(--brand-secondary);
}

.category-card p,
.article-row p,
.prose p,
.prose li,
.site-footer p {
  color: var(--muted);
}

.category-card p,
.article-row p {
  margin: 14px 0 0;
}

.split {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 6vw, 82px);
}

.compact {
  border-top: 3px solid var(--brand-secondary);
  padding-top: 22px;
}

.article-list {
  display: grid;
  gap: 34px;
}

.article-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: start;
}

.article-row h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.35rem);
}

.article {
  max-width: var(--reading-width);
  margin: 0 auto;
}

.article-header {
  padding: clamp(48px, 8vw, 96px) 0 34px;
  border-bottom: 1px solid var(--line);
}

.article-header .lead {
  padding: 18px 20px;
  border-left: 4px solid var(--brand-accent);
  background: var(--surface-warm);
  box-shadow: inset 0 0 0 1px rgba(217, 227, 230, 0.65);
}

.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  margin-top: 24px;
  color: var(--brand-secondary);
  font-weight: 820;
  text-decoration: none;
}

.back-link::before {
  content: "←";
  margin-right: 8px;
}

.prose {
  padding: 44px 0 clamp(58px, 8vw, 96px);
  font-size: 1.06rem;
}

.prose h2 {
  margin-top: 42px;
  font-size: clamp(1.55rem, 2.7vw, 2.25rem);
  line-height: 1.22;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin-top: 34px;
}

.prose p,
.prose ul,
.prose blockquote {
  margin: 18px 0 0;
}

.prose p {
  line-height: 1.88;
}

.prose ul {
  padding-left: 1.25rem;
}

.prose li + li {
  margin-top: 8px;
}

.prose blockquote {
  border-left: 3px solid var(--brand-accent);
  padding: 14px 0 14px 18px;
  color: var(--brand-primary);
  background: linear-gradient(90deg, rgba(201, 154, 46, 0.08), transparent);
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.72fr);
  gap: 28px;
  width: min(100% - 40px, var(--max-width));
  margin: 0 auto;
  padding: 34px 0 44px;
  border-top: 1px solid var(--line);
}

.site-footer strong {
  color: var(--brand-primary);
}

.site-footer p {
  margin: 8px 0 0;
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    min-height: auto;
    padding: 10px 14px 8px;
  }

  .brand {
    flex: 0 0 auto;
  }

  .site-nav {
    width: 100%;
    max-width: 100%;
    justify-content: flex-start;
    gap: 8px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    padding: 2px 0 6px;
    scroll-snap-type: x proximity;
  }

  .site-nav a {
    flex: 0 0 auto;
    min-height: 38px;
    padding: 8px 11px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.72);
    scroll-snap-align: start;
  }

  .site-nav a[aria-current="page"] {
    background: var(--soft-blue);
  }

  main,
  .site-footer {
    width: min(100% - 28px, var(--max-width));
  }

  .hero,
  .split,
  .site-footer,
  .article-row,
  .status-strip {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 42px 0 46px;
  }

  .hero-mark {
    justify-content: flex-start;
    padding: 22px;
  }

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

  .status-strip div {
    min-height: auto;
  }
}

@media (max-width: 620px) {
  body {
    line-height: 1.68;
  }

  .site-header {
    padding: 8px 12px 6px;
  }

  .brand img {
    width: min(188px, 62vw);
  }

  .site-nav {
    font-size: 0.86rem;
  }

  h1 {
    font-size: clamp(2.45rem, 14vw, 3.45rem);
  }

  .page-hero h1,
  .article-header h1 {
    font-size: clamp(2rem, 10vw, 2.85rem);
  }

  .lead {
    margin-top: 18px;
    font-size: 1.04rem;
  }

  .section {
    padding: 42px 0;
  }

  .page-hero {
    padding: 44px 0 34px;
  }

  .category-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .button,
  .read-link {
    width: 100%;
  }

  .article-header {
    padding: 38px 0 28px;
  }

  .article-header .lead {
    padding: 14px 15px;
  }

  .prose {
    padding-top: 34px;
    font-size: 1rem;
  }

  .prose p {
    line-height: 1.82;
  }

  .site-footer {
    padding-bottom: 34px;
  }
}