:root {
  --bg: #f8fbfd;
  --surface: #ffffff;
  --text: #12202f;
  --muted: #657386;
  --line: rgba(20, 55, 82, 0.13);
  --blue: #0f6f9f;
  --teal: #11a88f;
  --radius: 8px;
  --max: 900px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(115deg, rgba(15, 111, 159, 0.08), transparent 34%),
    linear-gradient(180deg, #fbfdff 0%, var(--bg) 48%, #ffffff 100%);
  line-height: 1.75;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 253, 255, 0.86);
  backdrop-filter: blur(18px);
}

.nav-inner {
  width: min(100% - 32px, 1120px);
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: var(--radius);
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--teal));
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
  font-weight: 800;
  font-size: .92rem;
}

.wrap {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.hero {
  padding: 76px 0 36px;
}

.eyebrow {
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 900;
  margin: 0 0 12px;
}

h1, h2 {
  font-family: Poppins, Inter, sans-serif;
  letter-spacing: 0;
  line-height: 1.12;
  margin: 0;
}

h1 { font-size: clamp(2.35rem, 6vw, 4.6rem); }
h2 { font-size: clamp(1.45rem, 3vw, 2.1rem); margin-top: 34px; }

p { color: var(--muted); margin: 16px 0 0; }

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(39, 167, 216, .12);
  font-weight: 800;
  font-size: .8rem;
}

.cover {
  margin: 34px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 24px 70px rgba(24, 72, 103, .12);
}

.cover img {
  width: 100%;
  max-height: 430px;
  object-fit: cover;
}

article {
  padding-bottom: 76px;
}

.inline-image {
  margin: 28px 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.inline-image img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
}

.inline-image figcaption {
  padding: 12px 16px;
  color: var(--muted);
  font-weight: 700;
  font-size: .9rem;
}

.key-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.key-points div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 16px;
}

.key-points strong {
  display: block;
  color: var(--text);
  margin-bottom: 6px;
}

.note {
  border-left: 4px solid var(--teal);
  background: rgba(17, 168, 143, .08);
  padding: 18px;
  border-radius: var(--radius);
  margin-top: 26px;
}

ul {
  margin: 18px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

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

.article-nav {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 42px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-weight: 800;
}

.btn.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue), #27a7d8);
  border-color: transparent;
}

footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 700px) {
  .nav-inner, .article-nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .key-points { grid-template-columns: 1fr; }
}