:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #14213d;
  --muted: #5f6b7a;
  --line: #d8e0ea;
  --primary: #0c4da2;
  --primary-soft: #dce9fb;
  --accent: #0d9488;
  --shadow: 0 12px 28px rgba(12, 37, 76, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

body[data-lang='zh-Hant'] {
  font-family: 'Noto Sans TC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.container {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(244, 247, 251, 0.86);
  border-bottom: 1px solid rgba(216, 224, 234, 0.8);
  z-index: 50;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 44px;
  height: 44px;
}

.brand-cn {
  font-size: 0.9rem;
  margin: 0;
  font-weight: 700;
}

.brand-en {
  font-size: 0.74rem;
  margin: 0;
  color: var(--muted);
}

.top-nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.top-nav a {
  text-decoration: none;
  color: var(--muted);
  font-size: 0.95rem;
}

.top-nav a:hover {
  color: var(--primary);
}

.lang-switch {
  display: inline-flex;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px;
}

.lang-btn {
  border: 0;
  background: transparent;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-weight: 700;
  color: var(--muted);
  cursor: pointer;
}

.lang-btn.active {
  background: var(--primary);
  color: #fff;
}

.hero {
  padding: 4.5rem 0 3rem;
  background: radial-gradient(circle at 10% 10%, #e4eefc, transparent 40%), var(--bg);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr;
  gap: 2rem;
}

.badge {
  display: inline-flex;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
}

h1 {
  font-size: clamp(1.8rem, 3.8vw, 3rem);
  line-height: 1.2;
  margin: 1rem 0;
}

.hero-text {
  color: var(--muted);
  max-width: 60ch;
}

.hero-cta {
  display: flex;
  gap: 0.8rem;
  margin-top: 1.25rem;
}

.btn {
  text-decoration: none;
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  font-weight: 700;
}

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

.btn.ghost {
  background: #fff;
  color: var(--primary);
  border: 1px solid var(--line);
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 1.3rem;
}

.hero-card h2 {
  margin-top: 0;
}

.hero-card ul {
  margin: 0;
  padding-left: 1.2rem;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: #edf3fb;
  border-top: 1px solid #dbe5f2;
  border-bottom: 1px solid #dbe5f2;
}

.section-heading {
  margin-bottom: 1.3rem;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 2.8vw, 2.3rem);
}

.lead {
  font-size: 1.07rem;
  color: #334155;
}

.purpose-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.purpose-list article,
.card,
.contact-note {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem 1.05rem;
  box-shadow: var(--shadow);
}

.purpose-list h3,
.card h3 {
  margin-top: 0;
  margin-bottom: 0.45rem;
}

.cards {
  display: grid;
  gap: 1rem;
}

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

.card span {
  color: var(--primary);
  font-size: 0.86rem;
  font-weight: 700;
}

.news-date {
  margin: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.86rem;
}

.grid-two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  align-items: center;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.65rem;
}

.check-list li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
}

.check-list li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  margin-right: 0.5rem;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.partners-grid div {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.9rem;
  text-align: center;
  font-weight: 600;
}

.site-footer {
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
  background: #f9fbff;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 1000px) {
  .top-nav {
    display: none;
  }

  .hero-grid,
  .cards.three,
  .grid-two,
  .partners-grid,
  .purpose-list {
    grid-template-columns: 1fr;
  }
}