:root {
  color-scheme: light;
  --ink: #152033;
  --muted: #5d6b82;
  --line: #d9e2ec;
  --brand: #004e92;
  --brand-deep: #073763;
  --accent: #10b981;
  --paper: #ffffff;
  --wash: #f4f7fb;
}

* {
  box-sizing: border-box;
}

html,
body {
  overflow-x: hidden;
}

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

p,
li {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
}

.header-inner,
.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 700;
}

.brand img {
  height: 44px;
  width: auto;
  display: block;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 18px;
  font-size: 14px;
  font-weight: 600;
}

.nav a {
  color: #334155;
}

.hero {
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(0, 78, 146, 0.94), rgba(7, 55, 99, 0.88)),
    url("/echo-biotech-logo.jpg") center / 420px auto no-repeat;
  color: #ffffff;
}

.hero .container {
  padding: 74px 0 64px;
}

.eyebrow {
  margin: 0 0 12px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  max-width: 1000px;
  margin: 0;
  font-size: clamp(34px, 6vw, 58px);
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.hero p {
  max-width: 720px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
}

.hero p span {
  display: block;
}

.section {
  padding: 44px 0;
}

.section-title {
  margin: 0 0 18px;
  font-size: 28px;
}

.lead {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 18px;
}

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

.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 24px;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

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

.article-list {
  display: grid;
  gap: 16px;
}

.article-link {
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  padding: 22px;
  color: var(--ink);
}

.article-link:hover {
  border-color: rgba(0, 78, 146, 0.35);
  text-decoration: none;
}

.article-link .meta {
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
}

.article-link h2 {
  margin: 0;
  overflow-wrap: anywhere;
  font-size: 22px;
}

.article-link p {
  margin: 0;
  color: var(--muted);
}

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

.article-hero {
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
}

.article-hero .container {
  padding: 54px 0 40px;
}

.article-hero h1 {
  color: var(--ink);
  overflow-wrap: anywhere;
  font-size: clamp(32px, 5vw, 50px);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
}

.article-body {
  width: min(840px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0 64px;
}

.article-body p {
  margin: 0 0 18px;
  color: #243044;
}

.article-body h2 {
  margin: 34px 0 14px;
  font-size: 26px;
}

.article-body ul {
  margin: 0 0 22px;
  padding-left: 22px;
}

.article-body li {
  margin: 8px 0;
}

.note {
  border-left: 4px solid var(--accent);
  background: #ecfdf5;
  padding: 18px 20px;
  color: #164e3a;
}

.footer {
  border-top: 1px solid var(--line);
  background: #0b1730;
  color: #cbd5e1;
}

.footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 0;
  font-size: 14px;
}

.footer a {
  color: #ffffff;
}

@media (max-width: 760px) {
  .hero p,
  .card p,
  .article-link p,
  .article-body p,
  .article-body li {
    word-break: break-all;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

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

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

  .hero .container {
    padding: 54px 0 48px;
  }
}