:root {
  --bg-1: #ffedd5;
  --bg-2: #dbeafe;
  --bg-3: #fef3c7;
  --ink: #1f2937;
  --muted: #4b5563;
  --accent: #ff6b6b;
  --accent-2: #4cc9f0;
  --accent-3: #f9a826;
  --card: #fff7ed;
  --card-2: #eef2ff;
  --shadow-dark: rgba(60, 64, 67, 0.2);
  --shadow-light: rgba(255, 255, 255, 0.8);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Nunito", "Noto Sans TC", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 15%, var(--bg-2), transparent 45%),
    radial-gradient(circle at 85% 10%, var(--bg-3), transparent 55%),
    linear-gradient(120deg, #fff5e5 0%, #e6f0ff 100%);
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  z-index: 20;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 5vw;
}

.logo {
  font-weight: 800;
  letter-spacing: 0.5px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.logo .dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 3px 3px 8px var(--shadow-dark);
}

.nav-links {
  display: flex;
  gap: 20px;
  font-weight: 600;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: 999px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.hero {
  padding: 70px 6vw 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.1rem, 3vw, 3.4rem);
  margin: 0 0 16px;
}

.hero p {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--muted);
}

.hero-card {
  padding: 26px;
  border-radius: 24px;
  background: var(--card);
  box-shadow: 10px 10px 25px var(--shadow-dark), -8px -8px 22px var(--shadow-light);
  position: relative;
  overflow: hidden;
}

.hero-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top right, rgba(255, 255, 255, 0.8), transparent 50%);
  pointer-events: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: #fff;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.12);
}

.cta-row {
  display: flex;
  gap: 16px;
  margin-top: 22px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 700;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-3));
  color: #1f2937;
  box-shadow: 6px 6px 18px rgba(0,0,0,0.2);
  cursor: pointer;
  transition: transform 0.2s ease;
}

.btn.secondary {
  background: #fff;
}

.btn:hover {
  transform: translateY(-3px);
}

.section {
  padding: 50px 6vw;
}

.section-title {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.section-subtitle {
  margin-top: -6px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 1rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--card-2);
  padding: 20px;
  border-radius: 22px;
  box-shadow: 10px 10px 25px var(--shadow-dark), -8px -8px 22px var(--shadow-light);
  min-height: 200px;
  position: relative;
}

.card h3 {
  margin-top: 0;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #fff;
  font-weight: 700;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.12);
  transition: transform 0.2s ease;
}

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

.diagram {
  width: 100%;
  background: #fff;
  border-radius: 18px;
  padding: 16px;
  box-shadow: inset 3px 3px 10px rgba(0,0,0,0.08);
}

.diagram img {
  display: block;
  width: 100%;
  max-width: 920px;
  height: auto;
  margin: 0 auto;
  border-radius: 16px;
}

.accordion {
  display: grid;
  gap: 12px;
}

.accordion-item {
  background: #fff;
  border-radius: 18px;
  padding: 14px 18px;
  box-shadow: 6px 6px 18px rgba(0,0,0,0.12);
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--muted);
}

.accordion-item.open .accordion-content {
  max-height: 240px;
  margin-top: 10px;
}

.progress-bar {
  height: 10px;
  background: #e5e7eb;
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-2), var(--accent));
  border-radius: 999px;
  transition: width 0.6s ease;
}

.progress-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.icon-btn {
  border: none;
  background: #fff;
  border-radius: 999px;
  padding: 4px 10px;
  font-weight: 700;
  font-size: 0.85rem;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.12);
  cursor: pointer;
}

.progress-mini {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  background: #fff;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.12);
}

.testimonials {
  display: grid;
  gap: 18px;
}

.testimonial {
  background: #fff;
  padding: 16px 18px;
  border-radius: 18px;
  box-shadow: 6px 6px 18px rgba(0,0,0,0.12);
}

.footer {
  padding: 32px 6vw 60px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer .credit {
  text-align: center;
  margin-top: 18px;
  font-size: 0.85rem;
}

.footer .credit a {
  font-weight: 700;
  text-decoration: none;
}

.floating-mascot {
  position: fixed;
  bottom: 18px;
  right: 18px;
  z-index: 50;
  text-decoration: none;
  color: inherit;
}

.floating-mascot .bubble {
  position: absolute;
  bottom: 100%;
  right: 0;
  margin-bottom: 10px;
  background: #fff;
  padding: 8px 14px;
  border-radius: 16px;
  box-shadow: 6px 6px 18px rgba(0,0,0,0.12);
  display: flex;
  gap: 8px;
  align-items: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  white-space: nowrap;
  pointer-events: none;
}

.floating-mascot:hover .bubble {
  opacity: 1;
  transform: translateY(0);
}

.floating-mascot .bubble::after {
  content: "";
  position: absolute;
  right: 16px;
  bottom: -8px;
  width: 0;
  height: 0;
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 8px solid #fff;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.08));
}

.floating-mascot img {
  width: 110px;
  height: auto;
  filter: drop-shadow(0 8px 16px rgba(0,0,0,0.22));
  animation: float 3.6s ease-in-out infinite;
  transition: transform 0.2s ease;
}

.floating-mascot:hover img {
  transform: scale(1.06);
}

.line-icon {
  width: 18px;
  height: 18px;
  color: #06c755;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.page-hero {
  padding: 40px 6vw 20px;
}

.page-hero h1 {
  margin-bottom: 6px;
}

.stepper {
  display: grid;
  gap: 14px;
}

.step {
  background: #fff;
  border-radius: 16px;
  padding: 14px 18px;
  box-shadow: 6px 6px 18px rgba(0,0,0,0.12);
}

.badge {
  display: inline-block;
  background: #fef3c7;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.tabs {
  background: #fff;
  border-radius: 22px;
  padding: 16px;
  box-shadow: 10px 10px 25px var(--shadow-dark), -8px -8px 22px var(--shadow-light);
}

.tab-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}

.tab-btn {
  border: none;
  background: #f3f4f6;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease;
}

.tab-btn.active {
  background: #fff7ed;
  box-shadow: 4px 4px 12px rgba(0,0,0,0.12);
}

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

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.tab-sub {
  margin-top: 4px;
  color: var(--muted);
}

.tab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.tab-card {
  background: #f9fafb;
  border-radius: 16px;
  padding: 12px 14px;
  box-shadow: inset 3px 3px 10px rgba(0,0,0,0.06);
}

@media (max-width: 780px) {
  .nav-links {
    display: none;
  }
  .hero {
    padding-top: 40px;
  }
  .floating-mascot img {
    width: 90px;
  }
}

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}