:root {
  --ma-bg: #f8fafc;
  --ma-panel: #ffffff;
  --ma-green-950: #022c22;
  --ma-green-900: #064e3b;
  --ma-green-800: #065f46;
  --ma-green-700: #047857;
  --ma-green-600: #059669;
  --ma-green-100: #d1fae5;
  --ma-green-50: #ecfdf5;
  --ma-slate-950: #020617;
  --ma-slate-700: #334155;
  --ma-slate-200: #e2e8f0;
  --ma-radius: 2rem;
  --ma-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
  --ma-glow: 0 20px 50px rgba(5, 150, 105, 0.24);
}

body {
  background: var(--ma-bg);
  color: var(--ma-slate-950);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  letter-spacing: 0;
}

.fw-black {
  font-weight: 900;
}

.text-ma-green {
  color: var(--ma-green-700);
}

.text-white-75 {
  color: rgba(255, 255, 255, 0.86);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 0.75rem;
  z-index: 2000;
  transform: translateY(-150%);
  border-radius: 999px;
  background: #ffffff;
  color: var(--ma-green-900);
  padding: 0.75rem 1rem;
  font-weight: 800;
  box-shadow: var(--ma-shadow);
}

.skip-link:focus {
  transform: translateY(0);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid rgba(16, 185, 129, 0.2);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
}

.brand-logo {
  width: auto;
  height: 44px;
  max-width: 210px;
  object-fit: contain;
}

.navbar .nav-link {
  border-radius: 999px;
  color: var(--ma-slate-700);
  font-weight: 800;
  padding: 0.55rem 1rem;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus-visible {
  background: var(--ma-green-50);
  color: var(--ma-green-950);
}

.navbar .nav-link.active {
  background: var(--ma-green-700);
  color: #ffffff;
}

.page-section[hidden] {
  display: none !important;
}

#main_content:focus {
  outline: none;
}

.ma-panel,
.ma-hero-card {
  border: 1px solid var(--ma-slate-200);
  border-radius: var(--ma-radius);
  background: var(--ma-panel);
  box-shadow: var(--ma-shadow);
}

.ma-panel {
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.page-intro {
  margin-bottom: 1.5rem;
}

.home-hero {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  border-color: rgba(16, 185, 129, 0.35);
  background:
    radial-gradient(circle at 18% 80%, rgba(132, 204, 22, 0.24), transparent 30%),
    radial-gradient(circle at 78% 24%, rgba(20, 184, 166, 0.2), transparent 28%),
    linear-gradient(90deg, rgba(2, 44, 34, 0.92), rgba(6, 78, 59, 0.78) 42%, rgba(6, 95, 70, 0.28)),
    url("../img/ai_bg_f.webp") center / cover no-repeat;
  padding: clamp(2rem, 5vw, 4rem);
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  background: rgba(2, 44, 34, 0.45);
  padding: 0.55rem 1rem;
  font-size: 0.95rem;
  font-weight: 900;
  backdrop-filter: blur(12px);
}

.hero-lead {
  max-width: 46rem;
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  font-weight: 800;
  line-height: 1.8;
}

.hero-copy,
.section-copy {
  max-width: 52rem;
  line-height: 1.8;
}

.hero-summary {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--ma-radius);
  background: rgba(2, 44, 34, 0.6);
  padding: 1.5rem;
  box-shadow: var(--ma-shadow);
  backdrop-filter: blur(14px);
}

.summary-list {
  display: grid;
  gap: 1rem;
}

.summary-item {
  display: flex;
  gap: 1rem;
  border: 1px solid rgba(209, 250, 229, 0.85);
  border-radius: 1.25rem;
  background: var(--ma-green-50);
  padding: 1rem;
}

.summary-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 2.5rem;
  height: 2.5rem;
  border-radius: 0.9rem;
  background: #ffffff;
  color: var(--ma-green-700);
}

.summary-title {
  margin: 0;
  color: var(--ma-green-950);
  font-size: 0.95rem;
  font-weight: 900;
}

.summary-text {
  margin: 0.35rem 0 0;
  color: var(--ma-slate-700);
  font-size: 0.95rem;
  line-height: 1.6;
}

.btn-ma-primary {
  --bs-btn-bg: var(--ma-green-700);
  --bs-btn-border-color: var(--ma-green-700);
  --bs-btn-color: #ffffff;
  --bs-btn-hover-bg: var(--ma-green-800);
  --bs-btn-hover-border-color: var(--ma-green-800);
  --bs-btn-hover-color: #ffffff;
  border-radius: 1rem;
  font-weight: 900;
}

.btn-ma-light {
  --bs-btn-bg: rgba(255, 255, 255, 0.95);
  --bs-btn-border-color: rgba(255, 255, 255, 0.8);
  --bs-btn-color: var(--ma-green-950);
  --bs-btn-hover-bg: var(--ma-green-50);
  --bs-btn-hover-border-color: var(--ma-green-100);
  border-radius: 1rem;
  font-weight: 900;
}

.section-heading {
  margin-bottom: 1rem;
}

.section-eyebrow {
  margin-bottom: 0.35rem;
  color: var(--ma-green-800);
  font-size: 0.9rem;
  font-weight: 900;
}

.filter-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  border: 0;
  border-radius: 1rem;
  color: var(--ma-slate-700);
  font-weight: 800;
  text-align: left;
}

.filter-btn:hover {
  background: var(--ma-green-50);
  color: var(--ma-green-950);
}

.filter-btn.active {
  background: var(--ma-green-700);
  color: #ffffff;
}

.ma-check-panel {
  background: linear-gradient(135deg, #065f46, #047857 55%, #14b8a6);
  color: #ffffff;
  box-shadow: var(--ma-glow);
}

.model-card,
.workshop-card,
.info-card {
  height: 100%;
  border: 1px solid var(--ma-slate-200);
  border-radius: var(--ma-radius);
  background: #ffffff;
  box-shadow: var(--ma-shadow);
}

.model-card,
.workshop-card {
  overflow: hidden;
}

.model-card:hover,
.workshop-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--ma-glow);
}

.model-visual,
.workshop-visual {
  position: relative;
  display: flex;
  min-height: 13rem;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, var(--ma-slate-950), var(--ma-green-950));
  color: #ffffff;
}

.model-visual img,
.workshop-visual img {
  width: 100%;
  height: 100%;
  min-height: 13rem;
  object-fit: cover;
}

.visual-fallback {
  display: flex;
  min-height: 13rem;
  width: 100%;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--ma-slate-950), var(--ma-green-950), #0f766e);
  color: #ffffff;
}

.visual-fallback i {
  font-size: 2.75rem;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  background: var(--ma-green-50);
  color: var(--ma-green-800);
  padding: 0.25rem 0.75rem;
  font-size: 0.8rem;
  font-weight: 900;
}

.info-card {
  padding: 1.25rem;
  background: #f8fafc;
}

.info-card ul {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--ma-slate-700);
  line-height: 1.8;
}

.model-list dt {
  margin-top: 1rem;
  color: var(--ma-green-800);
  font-weight: 900;
}

.model-list dd {
  margin-bottom: 0;
  color: var(--ma-slate-700);
  line-height: 1.8;
}

.category-card {
  border-radius: var(--ma-radius);
  background: linear-gradient(135deg, var(--ma-slate-950), var(--ma-green-950), #0f766e);
  color: #ffffff;
  padding: 1.5rem;
}

.category-card p {
  color: rgba(255, 255, 255, 0.86);
  line-height: 1.8;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list span {
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 800;
}

.review-diagram {
  display: grid;
  gap: 1.5rem;
}

.review-title {
  display: flex;
  min-height: 8.5rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 4px solid #6b922f;
  border-radius: 1.25rem;
  background: #ffffff;
  color: #001a36;
  text-align: center;
}

.review-title i {
  margin-bottom: 0.8rem;
  font-size: 3rem;
}

.review-title strong {
  font-size: 1.65rem;
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 0.8rem;
}

.review-grid span {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  justify-content: center;
  border: 4px solid #6b922f;
  border-radius: 1rem;
  background: #ffffff;
  color: #001a36;
  padding: 0.75rem;
  text-align: center;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
}

.note-box {
  border: 1px solid var(--ma-green-100);
  border-radius: 1.25rem;
  background: var(--ma-green-50);
  color: var(--ma-green-900);
  padding: 1rem;
  font-weight: 800;
  line-height: 1.8;
}

.pdf-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  border: 1px solid var(--ma-slate-200);
  border-radius: 1.25rem;
  background: #f8fafc;
  color: var(--ma-slate-950);
  padding: 1rem;
  text-decoration: none;
}

.pdf-link:hover {
  border-color: var(--ma-green-100);
  background: var(--ma-green-50);
}

.pdf-icon {
  display: inline-flex;
  width: 3.5rem;
  height: 3.5rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 1rem;
  background: #b91c1c;
  color: #ffffff;
  font-weight: 900;
}

.announcement-head,
.announcement-row {
  display: grid;
  gap: 1rem;
}

.announcement-head {
  grid-template-columns: 10rem minmax(0, 1fr) 9rem 9rem;
  border-bottom: 1px solid var(--ma-slate-200);
  padding-bottom: 1rem;
  color: #475569;
  font-size: 0.9rem;
  font-weight: 900;
}

.announcement-row {
  grid-template-columns: 10rem minmax(0, 1fr) 9rem 9rem;
  margin-top: 1rem;
  border: 1px solid var(--ma-green-100);
  border-radius: 1.25rem;
  background: var(--ma-green-50);
  padding: 1.25rem;
}

.announcement-note {
  border: 1px solid var(--ma-green-100);
  border-radius: 0.9rem;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ma-green-900);
  padding: 0.75rem;
  font-weight: 800;
}

.conflict-alert {
  border: 1px solid #f59e0b;
  border-radius: 1rem;
  background: #fffbeb;
  color: #78350f;
  padding: 0.75rem 1rem;
  font-weight: 900;
}

.registration-bar {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  left: 1rem;
  z-index: 1050;
  max-width: 58rem;
  margin: 0 auto;
  border-radius: 1.5rem;
  background: rgba(2, 6, 23, 0.92);
  color: #ffffff;
  padding: 1rem;
  box-shadow: var(--ma-glow);
  backdrop-filter: blur(14px);
}

.registration-bar-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.sensitive-box {
  border: 1px solid rgba(20, 184, 166, 0.55);
  border-radius: 1.25rem;
  background: linear-gradient(135deg, #020617, #022c22);
  color: #ffffff;
  padding: 1rem;
}

.sensitive-box label,
.sensitive-box .form-text {
  color: #ffffff;
}

.site-footer {
  margin-top: 4rem;
  border-top: 1px solid var(--ma-green-100);
  background: #ffffff;
  padding: 2rem 0;
}

.footer-unit {
  height: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  padding: 0.75rem 0;
  transition: transform 0.18s ease;
}

.footer-unit:hover,
.footer-unit:focus-within {
  transform: translateY(-2px);
}

.footer-unit p {
  margin-bottom: 0.75rem;
  color: var(--ma-green-800);
  font-size: 0.8rem;
  font-weight: 900;
}

.logo-surface {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  padding: 0;
}

.logo-surface.light {
  background: transparent;
}

.logo-surface img {
  max-width: 100%;
  max-height: 2.8rem;
  object-fit: contain;
}

@media (min-width: 992px) {
  .review-diagram {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 991.98px) {
  .announcement-head {
    display: none;
  }

  .announcement-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 575.98px) {
  .brand-logo {
    max-width: 170px;
  }

  .home-hero {
    padding: 1.5rem;
  }

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