:root {
  --bg: #090a14;
  --bg-soft: #101327;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.14);
  --text: #f8f8ff;
  --text-soft: #b8bfd8;
  --gold: #f59e0b;
  --gold-soft: #fcd58b;
  --purple: #8b5cf6;
  --purple-soft: #bca2ff;
  --line: rgba(255, 255, 255, 0.18);
  --ok: #34d399;
  --danger: #f87171;
  --max: 1200px;
  --radius-xl: 24px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 10%, rgba(139, 92, 246, 0.28), transparent 45%),
    radial-gradient(circle at 10% 80%, rgba(245, 158, 11, 0.22), transparent 40%),
    var(--bg);
  font-family: "Space Grotesk", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.65;
}

a {
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--gold);
  color: #1f1300;
  padding: 0.7rem 1rem;
  z-index: 1000;
  border-radius: 0 0 8px 8px;
}

.skip-link:focus {
  left: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(9, 10, 20, 0.72);
  border-bottom: 1px solid rgba(245, 158, 11, 0.22);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.nav-meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand {
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
}

.brand span {
  color: var(--gold);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-soft);
  transition: color 0.2s ease;
}

.nav-links a[aria-current="page"],
.nav-links a:hover {
  color: #fff;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  border-radius: 10px;
  padding: 0.45rem 0.55rem;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem;
  background: rgba(255, 255, 255, 0.04);
}

.lang-link {
  text-decoration: none;
  color: var(--text-soft);
  font-size: 0.84rem;
  line-height: 1;
  border-radius: 999px;
  padding: 0.35rem 0.6rem;
}

.lang-link.active {
  color: #141020;
  background: linear-gradient(135deg, var(--gold), var(--purple-soft));
}

.hero {
  padding: 5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2rem;
  align-items: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.12);
  color: var(--gold-soft);
  margin-bottom: 1rem;
}

.hero h1,
.page-title {
  margin: 0;
  line-height: 1.1;
  font-size: clamp(2rem, 4.2vw, 3.6rem);
}

.hero p {
  margin: 1.1rem 0 1.8rem;
  color: var(--text-soft);
  max-width: 62ch;
}

.actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.btn-primary,
.btn-secondary,
.btn-cta {
  border: none;
  cursor: pointer;
  border-radius: 999px;
  padding: 0.78rem 1.2rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.94rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary,
.btn-cta {
  background: linear-gradient(135deg, var(--gold), var(--purple));
  color: #130b1f;
  box-shadow: 0 10px 24px rgba(245, 158, 11, 0.2);
}

.btn-primary:hover,
.btn-cta:hover,
.btn-secondary:hover {
  transform: translateY(-2px);
}

.btn-secondary {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.glass-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.11), rgba(255, 255, 255, 0.05));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
  min-height: 420px;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(9, 10, 20, 0.2), rgba(9, 10, 20, 0.65));
}

.hero-media .stat-box {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.8rem 1rem;
}

.hero-media .stat-box strong {
  font-size: 1.45rem;
}

.section {
  padding: 3.5rem 0;
}

.section h2 {
  margin-top: 0;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
}

.section p.section-intro {
  color: var(--text-soft);
  margin-top: 0.6rem;
  max-width: 70ch;
}

.grid-3,
.grid-4,
.grid-2 {
  display: grid;
  gap: 1rem;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  padding: 1.1rem;
}

.card h3,
.card h4 {
  margin: 0 0 0.45rem;
}

.card p,
.card li {
  color: var(--text-soft);
}

.highlight {
  border-color: rgba(245, 158, 11, 0.55);
  background: linear-gradient(145deg, rgba(245, 158, 11, 0.14), rgba(139, 92, 246, 0.08));
}

.badge {
  display: inline-flex;
  padding: 0.3rem 0.62rem;
  border-radius: 999px;
  border: 1px solid rgba(245, 158, 11, 0.4);
  font-size: 0.78rem;
  color: var(--gold-soft);
}

.metric {
  text-align: center;
  padding: 1rem;
}

.metric strong {
  font-size: 2rem;
  display: block;
}

.visual {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-hero {
  padding: 4.2rem 0 2rem;
}

.page-hero p {
  color: var(--text-soft);
  max-width: 74ch;
}

.list-clean {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.list-clean li {
  margin: 0.45rem 0;
  color: var(--text-soft);
}

.list-clean li::before {
  content: "";
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.55rem;
  background: linear-gradient(135deg, var(--gold), var(--purple));
  border-radius: 50%;
  vertical-align: middle;
}

.flow {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.flow .step {
  padding: 0.6rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  font-size: 0.92rem;
}

.flow .arrow {
  align-self: center;
  color: var(--gold-soft);
}

.demo-box {
  padding: 1.25rem;
}

.status-pill {
  display: inline-flex;
  padding: 0.28rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  border: 1px solid var(--line);
}

.status-pill.success {
  border-color: rgba(52, 211, 153, 0.45);
  color: #a7f3d0;
}

.status-pill.waiting {
  border-color: rgba(245, 158, 11, 0.45);
  color: #fde68a;
}

.status-pill.error {
  border-color: rgba(248, 113, 113, 0.45);
  color: #fecaca;
}

.log {
  margin-top: 1rem;
  background: rgba(0, 0, 0, 0.28);
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: 0.8rem;
  min-height: 110px;
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.82rem;
  white-space: pre-wrap;
}

.cta-block {
  text-align: center;
  padding: 1.5rem;
}

form {
  display: grid;
  gap: 0.85rem;
}

label {
  font-size: 0.9rem;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  padding: 0.7rem 0.8rem;
  font: inherit;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid rgba(245, 158, 11, 0.35);
  border-color: rgba(245, 158, 11, 0.7);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  margin-top: 2rem;
}

.form-feedback {
  margin: 0.9rem 0 0;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  font-size: 0.92rem;
}

.form-feedback.success {
  border-color: rgba(52, 211, 153, 0.45);
  background: rgba(52, 211, 153, 0.1);
  color: #bbf7d0;
}

.form-feedback.error {
  border-color: rgba(248, 113, 113, 0.45);
  background: rgba(248, 113, 113, 0.1);
  color: #fecaca;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 1rem;
}

.footer-grid a {
  color: var(--text-soft);
  text-decoration: none;
}

.footer-grid a:hover {
  color: #fff;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .hero-grid,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-meta {
    margin-left: auto;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    right: 1rem;
    left: 1rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(9, 10, 20, 0.95);
    padding: 0.85rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
  }

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

  .hero {
    padding-top: 3.3rem;
  }

  .hero-grid,
  .grid-4,
  .grid-3,
  .grid-2,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-media {
    min-height: 330px;
  }

  .actions {
    width: 100%;
  }

  .actions .btn-primary,
  .actions .btn-secondary,
  .actions .btn-cta {
    flex: 1;
  }
}

@media (max-width: 375px) {
  .container {
    width: min(var(--max), calc(100% - 1rem));
  }

  .hero h1,
  .page-title {
    font-size: 1.8rem;
  }
}