:root {
  --bg: #f6f7fb;
  --surface: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #e5e7eb;
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", sans-serif;
  background: linear-gradient(180deg, #f8fafc 0%, #eef2ff 100%);
  color: var(--text);
  line-height: 1.7;
}

img {
  max-width: 100%;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.narrow {
  width: min(760px, 100%);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.7);
}

.nav-wrap,
.footer-wrap,
.contact-box,
.hero-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav a,
.logo,
.site-footer a,
.text-link {
  color: var(--text);
  text-decoration: none;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav a:hover,
.site-footer a:hover,
.text-link:hover {
  color: var(--primary);
}

.hero {
  padding: 96px 0 72px;
}

.hero-grid {
  align-items: stretch;
}

.hero-grid > * {
  flex: 1;
}

.eyebrow,
.section-label {
  display: inline-block;
  font-weight: 700;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

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

h1 {
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.1;
  margin-bottom: 18px;
}

h2 {
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.2;
  margin-bottom: 16px;
}

.subtitle,
.card p,
#about p,
#contact p {
  color: var(--muted);
}

.hero-actions,
.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 14px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.22);
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
}

.hero-card,
.card,
.contact-box {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 32px;
}

.card-badge {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 999px;
  background: #111827;
  color: #fff;
  font-size: 14px;
  margin-bottom: 18px;
}

.section {
  padding: 84px 0;
}

.alt {
  background: rgba(255, 255, 255, 0.45);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 26px;
}

.card {
  padding: 28px;
}

.contact-box {
  padding: 32px;
}

.site-footer {
  border-top: 1px solid rgba(229, 231, 235, 0.8);
  background: rgba(255, 255, 255, 0.7);
  padding: 24px 0;
}

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

@media (max-width: 900px) {
  .hero-grid,
  .contact-box,
  .footer-wrap {
    flex-direction: column;
    align-items: flex-start;
  }

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