:root {
  --bg: #0a0e14;
  --bg-alt: #0f1520;
  --surface: #161f2e;
  --text: #eef4fb;
  --text-muted: #94a8be;
  --accent: #4dabf7;
  --accent-soft: rgba(77, 171, 247, 0.2);
  --accent-2: #63e6be;
  --coral: #ff8a7a;
  --violet: #b197fc;
  --amber: #ffd43b;
  --cyan: #66d9e8;
  --magenta: #f06595;
  --border: rgba(255, 255, 255, 0.09);
  --radius: 14px;
  --font-zh: "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --font-en: "Source Sans 3", system-ui, sans-serif;
  --max: 1120px;
  --pillar-optics: #4dabf7;
  --pillar-motion: #63e6be;
  --pillar-agent: #b197fc;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-zh);
  color: var(--text);
  line-height: 1.65;
  font-size: 1rem;
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 100% -20%, rgba(77, 171, 247, 0.12), transparent 50%),
    radial-gradient(ellipse 80% 60% at 0% 50%, rgba(177, 151, 252, 0.08), transparent 45%),
    radial-gradient(ellipse 70% 50% at 80% 100%, rgba(99, 230, 190, 0.06), transparent 40%);
  background-attachment: scroll;
  min-height: 100vh;
  min-height: 100dvh;
}

body.lang-en {
  font-family: var(--font-en);
}

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

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

a:hover {
  text-decoration: underline;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), var(--violet), var(--coral));
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 0 4px 14px rgba(77, 171, 247, 0.35);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s;
}

.nav a:hover {
  color: var(--cyan);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.lang-switch {
  display: inline-flex;
  padding: 3px;
  border-radius: 8px;
  border: 1px solid rgba(177, 151, 252, 0.35);
  background: rgba(15, 21, 32, 0.9);
  gap: 2px;
}

.lang-switch-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: inherit;
  line-height: 1.2;
  transition: background 0.15s, color 0.15s;
}

.lang-switch-btn:hover {
  color: var(--text);
}

.lang-switch-btn.is-active {
  background: linear-gradient(135deg, var(--accent), var(--violet));
  color: #061018;
}

.lang-toggle {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
}

.hero {
  position: relative;
  padding: 5rem 0 4.5rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 85% 15%, rgba(77, 171, 247, 0.25), transparent),
    radial-gradient(ellipse 55% 45% at 10% 70%, rgba(240, 101, 149, 0.12), transparent),
    radial-gradient(ellipse 45% 40% at 50% 100%, rgba(99, 230, 190, 0.15), transparent);
  pointer-events: none;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    -12deg,
    transparent,
    transparent 48px,
    rgba(255, 255, 255, 0.015) 48px,
    rgba(255, 255, 255, 0.015) 49px
  );
  pointer-events: none;
}

.hero-content {
  position: relative;
}

.eyebrow {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  margin: 0 0 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #0a0e14;
  background: linear-gradient(90deg, var(--accent-2), var(--cyan));
  border-radius: 999px;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.65rem);
  line-height: 1.28;
  margin: 0 0 1.25rem;
  max-width: 22ch;
  color: var(--text);
  background: linear-gradient(120deg, #fff 0%, #c5e4ff 35%, #b197fc 70%, #63e6be 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 42rem;
  margin: 0 0 2rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.35rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #228be6);
  color: #061018;
  box-shadow: 0 4px 20px rgba(77, 171, 247, 0.4);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(77, 171, 247, 0.5);
  text-decoration: none;
}

.btn-secondary {
  border-color: rgba(177, 151, 252, 0.5);
  color: var(--violet);
  background: rgba(177, 151, 252, 0.08);
}

.btn-secondary:hover {
  border-color: var(--violet);
  background: rgba(177, 151, 252, 0.15);
  text-decoration: none;
}

.hero-tagline {
  font-size: 0.85rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0;
  background: linear-gradient(90deg, var(--coral), var(--amber));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}

.section {
  padding: 4rem 0;
  position: relative;
}

#top,
#about,
#services,
#milestones,
#health,
#contact {
  scroll-margin-top: 5rem;
}

.section-about {
  background: linear-gradient(180deg, transparent, rgba(77, 171, 247, 0.04) 50%, transparent);
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(15, 21, 32, 0.95), rgba(18, 28, 42, 0.98)),
    radial-gradient(ellipse 60% 40% at 50% 0%, rgba(177, 151, 252, 0.08), transparent);
  border-block: 1px solid rgba(255, 255, 255, 0.05);
}

.section-health {
  background:
    linear-gradient(135deg, rgba(15, 21, 32, 0.98) 0%, rgba(20, 35, 40, 0.95) 50%, rgba(25, 20, 35, 0.98) 100%),
    radial-gradient(ellipse 50% 60% at 100% 50%, rgba(99, 230, 190, 0.1), transparent);
}

.section-title {
  font-size: 1.75rem;
  margin: 0 0 1.25rem;
  position: relative;
}

.section-title.center::after {
  content: "";
  display: block;
  width: 4rem;
  height: 4px;
  margin: 0.75rem auto 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--violet), var(--accent-2));
}

.section-title.center,
.section-sub.center {
  text-align: center;
}

.section-sub {
  color: var(--text-muted);
  margin: -0.5rem 0 2.5rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.card {
  background: rgba(22, 31, 46, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.highlight-card {
  border: 1px solid transparent;
  background:
    linear-gradient(rgba(22, 31, 46, 0.92), rgba(22, 31, 46, 0.92)) padding-box,
    linear-gradient(135deg, var(--accent), var(--violet), var(--coral)) border-box;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.highlight-card h3 {
  margin-top: 0;
  background: linear-gradient(90deg, var(--accent), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.fact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0;
}

.fact-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.fact-list li strong {
  color: var(--cyan);
}

.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  position: relative;
  background: rgba(22, 31, 46, 0.75);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  padding-top: 2.25rem;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.service-card--optics::before {
  background: linear-gradient(90deg, var(--pillar-optics), var(--cyan));
}

.service-card--motion::before {
  background: linear-gradient(90deg, var(--pillar-motion), #20c997);
}

.service-card--agent::before {
  background: linear-gradient(90deg, var(--pillar-agent), var(--magenta));
}

.service-card--optics:hover {
  border-color: rgba(77, 171, 247, 0.45);
  box-shadow: 0 12px 40px rgba(77, 171, 247, 0.15);
}

.service-card--motion:hover {
  border-color: rgba(99, 230, 190, 0.45);
  box-shadow: 0 12px 40px rgba(99, 230, 190, 0.12);
}

.service-card--agent:hover {
  border-color: rgba(177, 151, 252, 0.45);
  box-shadow: 0 12px 40px rgba(177, 151, 252, 0.15);
}

.service-card:hover {
  transform: translateY(-4px);
}

.service-icon {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  opacity: 0.35;
}

.service-card--optics .service-icon {
  color: var(--pillar-optics);
  opacity: 0.6;
}

.service-card--motion .service-icon {
  color: var(--pillar-motion);
  opacity: 0.6;
}

.service-card--agent .service-icon {
  color: var(--pillar-agent);
  opacity: 0.6;
}

.service-num {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-card--optics .service-num {
  color: var(--pillar-optics);
}

.service-card--motion .service-num {
  color: var(--pillar-motion);
}

.service-card--agent .service-num {
  color: var(--pillar-agent);
}

.service-card h3 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

.service-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.timeline {
  list-style: none;
  padding: 0 0 0 1.25rem;
  margin: 0 auto 2rem;
  max-width: 52rem;
  border-left: 2px solid transparent;
  border-image: linear-gradient(180deg, var(--accent), var(--violet), var(--accent-2), var(--coral)) 1;
}

.timeline li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0 1rem 1.25rem;
  position: relative;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -1.42rem;
  top: 1.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.25);
}

.timeline li:nth-child(2)::before {
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(102, 217, 232, 0.25);
}

.timeline li:nth-child(3)::before {
  background: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(99, 230, 190, 0.25);
}

.timeline li:nth-child(4)::before {
  background: var(--violet);
  box-shadow: 0 0 0 3px rgba(177, 151, 252, 0.25);
}

.timeline li:nth-child(5)::before {
  background: var(--coral);
  box-shadow: 0 0 0 3px rgba(255, 138, 122, 0.25);
}

.timeline .year {
  font-weight: 700;
  font-size: 0.9rem;
}

.timeline li:nth-child(1) .year {
  color: var(--accent);
}

.timeline li:nth-child(2) .year {
  color: var(--cyan);
}

.timeline li:nth-child(3) .year {
  color: var(--accent-2);
}

.timeline li:nth-child(4) .year {
  color: var(--violet);
}

.timeline li:nth-child(5) .year {
  color: var(--coral);
}

.note {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.note.center {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  background: rgba(255, 212, 59, 0.08);
  border: 1px solid rgba(255, 212, 59, 0.2);
  color: #ffe066;
}

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

.stat {
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  text-align: center;
  border: 1px solid var(--border);
}

.stat--coral {
  background: linear-gradient(145deg, rgba(255, 138, 122, 0.15), rgba(22, 31, 46, 0.9));
  border-color: rgba(255, 138, 122, 0.35);
}

.stat--violet {
  background: linear-gradient(145deg, rgba(177, 151, 252, 0.15), rgba(22, 31, 46, 0.9));
  border-color: rgba(177, 151, 252, 0.35);
}

.stat--cyan {
  background: linear-gradient(145deg, rgba(102, 217, 232, 0.15), rgba(22, 31, 46, 0.9));
  border-color: rgba(102, 217, 232, 0.35);
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
}

.stat--coral .stat-value {
  color: var(--coral);
}

.stat--violet .stat-value {
  color: var(--violet);
}

.stat--cyan .stat-value {
  color: var(--cyan);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.text-link {
  display: inline-block;
  margin-top: 1rem;
  font-weight: 600;
  color: var(--accent-2);
}

.contact-section {
  background: radial-gradient(ellipse 80% 50% at 20% 100%, rgba(77, 171, 247, 0.08), transparent);
}

.contact-section .card {
  border-color: rgba(99, 230, 190, 0.25);
  background: linear-gradient(160deg, rgba(99, 230, 190, 0.08), rgba(22, 31, 46, 0.9));
}

.contact-section .card h3 {
  color: var(--accent-2);
  margin-top: 0;
}

.contact-section address {
  font-style: normal;
}

.contact-block p {
  margin: 0 0 1rem;
}

.company-legal {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  background: linear-gradient(180deg, #06080c, #0a0e14);
}

.footer-inner {
  text-align: center;
}

.footer-inner p {
  margin: 0.35rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-meta {
  background: linear-gradient(90deg, var(--text-muted), var(--violet), var(--text-muted));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent !important;
}

@media (max-width: 900px) {
  .grid-2,
  .cards-3 {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg);
    padding: 1rem 1.5rem 1.5rem;
    border-bottom: 1px solid var(--border);
  }

  .nav.is-open {
    display: flex;
  }

  .site-header .container {
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .timeline {
    padding-left: 1rem;
  }

  .timeline li {
    grid-template-columns: 1fr;
    gap: 0.35rem;
    padding-left: 1rem;
  }
}

/* Google Sites 內嵌 iframe（若仍使用） */
html.is-embedded {
  overflow-x: hidden;
}

html.is-embedded body {
  overflow-x: hidden;
  background-attachment: scroll;
  min-height: 100%;
}