/* =============================================================================
   Junior Education Co. — Global design system (mobile-first)
   ============================================================================= */

:root {
  --color-primary: #0a2540;
  --color-primary-soft: #123a5c;
  --color-accent: #635bff;
  --color-accent-soft: #7b74ff;
  --color-accent-glow: rgba(99, 91, 255, 0.35);
  --color-bg: #050d18;
  --color-bg-elevated: #0a1628;
  --color-surface: rgba(15, 35, 60, 0.65);
  --color-surface-solid: #0f233c;
  --color-text: #e8eef5;
  --color-text-muted: #94a8bc;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(99, 91, 255, 0.35);

  --font-sans: "DM Sans", "Noto Sans TC", system-ui, -apple-system, sans-serif;
  --font-display: "Outfit", "Noto Sans TC", system-ui, sans-serif;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  --radius-sm: 0.5rem;
  --radius-md: 0.875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;

  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 40px var(--color-accent-glow);

  --nav-height: 4rem;
  --nav-blur: 16px;
  --max-width: 72rem;
  --header-z: 100;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 0.18s;
  --duration-med: 0.35s;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(99, 91, 255, 0.18), transparent),
    radial-gradient(ellipse 80% 50% at 100% 50%, rgba(10, 37, 64, 0.5), transparent);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-4);
  z-index: calc(var(--header-z) + 1);
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.skip-link:focus {
  left: var(--space-4);
}

/* -----------------------------------------------------------------------------
   Typography
   ----------------------------------------------------------------------------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fff;
  margin-block: 0 0.5em;
}

h1 {
  font-size: clamp(1.875rem, 5vw + 1rem, 3.25rem);
}

h2 {
  font-size: clamp(1.5rem, 2.5vw + 0.75rem, 2.25rem);
}

h3 {
  font-size: clamp(1.125rem, 1.2vw + 1rem, 1.375rem);
}

p {
  margin-block: 0 1em;
  color: var(--color-text-muted);
}

.lead {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  max-width: 38rem;
}

.muted {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

/* -----------------------------------------------------------------------------
   Layout utilities
   ----------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-inline: var(--space-6);
  }
}

.section {
  padding-block: var(--space-12);
}

@media (min-width: 960px) {
  .section {
    padding-block: var(--space-16);
  }
}

.section-head {
  margin-bottom: var(--space-8);
}

.section-head h2 {
  margin-bottom: var(--space-3);
}

/* -----------------------------------------------------------------------------
   Glass sticky header / nav
   ----------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--header-z);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--color-border);
  background: rgba(10, 37, 64, 0.55);
  backdrop-filter: blur(var(--nav-blur)) saturate(1.4);
  -webkit-backdrop-filter: blur(var(--nav-blur)) saturate(1.4);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .site-header__inner {
    padding-inline: var(--space-6);
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: 0;
  text-decoration: none;
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.logo:hover {
  color: #fff;
}

.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo__text small {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 1.125rem;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform var(--duration-med) var(--ease-out), opacity var(--duration-fast);
}

body.nav-open .nav-toggle__bars span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

body.nav-open .nav-toggle__bars span:nth-child(2) {
  opacity: 0;
}

body.nav-open .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 960px) {
  .nav-toggle {
    display: none;
  }
}

.site-nav {
  position: fixed;
  inset: var(--nav-height) 0 0 0;
  background: rgba(5, 13, 24, 0.97);
  backdrop-filter: blur(12px);
  padding: var(--space-6);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--duration-med) var(--ease-out), visibility var(--duration-med);
}

body.nav-open .site-nav {
  transform: translateX(0);
  visibility: visible;
}

@media (min-width: 960px) {
  .site-nav {
    position: static;
    inset: auto;
    background: transparent;
    backdrop-filter: none;
    padding: 0;
    transform: none;
    visibility: visible;
    display: flex;
    align-items: center;
    gap: var(--space-1);
  }
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

@media (min-width: 960px) {
  .site-nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: var(--space-1);
  }
}

.site-nav a {
  display: block;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background var(--duration-fast), color var(--duration-fast);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: rgba(99, 91, 255, 0.2);
  color: #fff;
}

@media (min-width: 960px) {
  .site-nav a {
    padding: var(--space-2) var(--space-3);
    font-size: 0.875rem;
  }
}

.site-nav a.site-nav__quote {
  margin-top: var(--space-4);
  text-align: center;
  background: linear-gradient(135deg, var(--color-accent), #5248e6);
  color: #fff !important;
  box-shadow: var(--shadow-glow);
}

.site-nav a.site-nav__quote:hover {
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent));
  color: #fff !important;
}

@media (min-width: 960px) {
  .site-nav a.site-nav__quote {
    margin-top: 0;
    margin-left: var(--space-2);
    padding-inline: var(--space-4);
  }
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--duration-fast) var(--ease-out), box-shadow var(--duration-fast);
}

.btn:active {
  transform: scale(0.98);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent), #5248e6);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  color: #fff;
  box-shadow: 0 0 48px var(--color-accent-glow);
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  border: 1px solid var(--color-border);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.btn--quote {
  background: linear-gradient(135deg, var(--color-accent), #5248e6);
  color: #fff;
  box-shadow: var(--shadow-glow);
}

.btn--quote:hover {
  color: #fff;
  box-shadow: 0 0 48px var(--color-accent-glow);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

/* -----------------------------------------------------------------------------
   Hero
   ----------------------------------------------------------------------------- */

.hero {
  padding-block: var(--space-12) var(--space-10);
  position: relative;
  overflow: hidden;
}

@media (min-width: 960px) {
  .hero {
    padding-block: var(--space-16) var(--space-12);
  }
}

.hero__grid {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

@media (min-width: 960px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
  }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent-soft);
  background: rgba(99, 91, 255, 0.15);
  border: 1px solid var(--color-border-strong);
  border-radius: 999px;
  margin-bottom: var(--space-4);
}

.hero__visual {
  position: relative;
  min-height: 220px;
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, var(--color-surface-solid), var(--color-primary));
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  display: grid;
  place-items: center;
  padding: var(--space-8);
}

.hero__orb {
  position: absolute;
  width: 60%;
  height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-accent-glow), transparent 70%);
  filter: blur(40px);
  pointer-events: none;
}

.hero__card-stack {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 280px;
}

.hero__mini {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.hero__mini strong {
  display: block;
  color: #fff;
  margin-bottom: var(--space-1);
}

/* -----------------------------------------------------------------------------
   Marquee
   ----------------------------------------------------------------------------- */

.marquee-wrap {
  border-block: 1px solid var(--color-border);
  background: rgba(10, 37, 64, 0.4);
  overflow: hidden;
}

.marquee {
  display: flex;
  width: max-content;
  animation: marquee-scroll 32s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .marquee {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
    gap: var(--space-4);
    padding-block: var(--space-4);
  }
}

.marquee__group {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-4) var(--space-6);
  flex-shrink: 0;
}

.marquee__item {
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.marquee__item--accent {
  color: var(--color-accent-soft);
}

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

/* -----------------------------------------------------------------------------
   Bento grid
   ----------------------------------------------------------------------------- */

.bento {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .bento {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .bento {
    grid-template-columns: 1.25fr 1fr;
    grid-template-rows: auto auto auto;
    gap: var(--space-5);
  }

  .bento__card--kg {
    grid-column: 1;
    grid-row: 1 / span 2;
    min-height: 100%;
  }

  .bento__card--primary {
    grid-column: 2;
    grid-row: 1;
  }

  .bento__card--secondary {
    grid-column: 2;
    grid-row: 2;
  }

  .bento__card--sen {
    grid-column: 1 / -1;
    grid-row: 3;
  }
}

.bento__card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition:
    transform var(--duration-med) var(--ease-out),
    border-color var(--duration-fast),
    box-shadow var(--duration-med) var(--ease-out);
}

.bento__card:hover {
  transform: translateY(-4px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.bento__card:focus-visible {
  outline-offset: 4px;
}

.bento__card h3 {
  margin-bottom: var(--space-2);
  color: #fff;
}

.bento__card p {
  margin: 0;
  flex-grow: 1;
  font-size: 0.9375rem;
}

.bento__tag {
  display: inline-block;
  align-self: flex-start;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 999px;
  background: rgba(99, 91, 255, 0.25);
  color: var(--color-accent-soft);
}

.bento__card--kg .bento__tag {
  background: rgba(99, 91, 255, 0.3);
}

.bento__arrow {
  margin-top: var(--space-4);
  font-size: 1.25rem;
  color: var(--color-accent-soft);
  transition: transform var(--duration-fast) var(--ease-out);
}

.bento__card:hover .bento__arrow {
  transform: translateX(4px);
}

/* -----------------------------------------------------------------------------
   Content cards / page sections
   ----------------------------------------------------------------------------- */

.card-grid {
  display: grid;
  gap: var(--space-5);
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.content-card {
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color var(--duration-fast), box-shadow var(--duration-med) var(--ease-out);
}

.content-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.content-card h3 {
  margin-bottom: var(--space-3);
}

.content-card .content-list {
  margin: 0 0 0.75em;
  padding-left: 1.2em;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.content-card .content-list li + li {
  margin-top: 0.4em;
}

.content-card .tag {
  display: inline-block;
  margin-bottom: var(--space-3);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent-soft);
}

@media (min-width: 640px) {
  .content-card--span {
    grid-column: 1 / -1;
  }
}

/* -----------------------------------------------------------------------------
   Scroll reveal
   ----------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity 0.65s var(--ease-out),
    transform 0.65s var(--ease-out);
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

.reveal-stagger > *:nth-child(1) {
  transition-delay: 0ms;
}

.reveal-stagger > *:nth-child(2) {
  transition-delay: 60ms;
}

.reveal-stagger > *:nth-child(3) {
  transition-delay: 120ms;
}

.reveal-stagger > *:nth-child(4) {
  transition-delay: 180ms;
}

/* -----------------------------------------------------------------------------
   FAQ accordion
   ----------------------------------------------------------------------------- */

.faq {
  max-width: 42rem;
  margin-inline: auto;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  background: none;
  border: none;
  color: #fff;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  list-style: none;
}

.faq__trigger::-webkit-details-marker {
  display: none;
}

details.faq__item > .faq__trigger {
  list-style: none;
}

.faq__icon {
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: rgba(99, 91, 255, 0.2);
  color: var(--color-accent-soft);
  font-size: 1.125rem;
  line-height: 1;
  transition: transform var(--duration-fast) var(--ease-out);
}

.faq__item[open] .faq__icon {
  transform: rotate(45deg);
}

.faq__panel {
  padding-bottom: var(--space-5);
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.faq__panel p:last-child {
  margin-bottom: 0;
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-10);
  background: rgba(5, 13, 24, 0.85);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-8);
}

@media (min-width: 640px) {
  .site-footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

.site-footer h4 {
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
}

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

.site-footer li + li {
  margin-top: var(--space-2);
}

.footer-contact {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

.footer-contact a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.site-footer__bottom {
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* -----------------------------------------------------------------------------
   Page hero (inner pages)
   ----------------------------------------------------------------------------- */

.page-hero {
  padding-block: var(--space-10) var(--space-8);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, rgba(99, 91, 255, 0.08), transparent);
}

.page-hero h1 {
  margin-bottom: var(--space-3);
}

/* -----------------------------------------------------------------------------
   Contact strip
   ----------------------------------------------------------------------------- */

.contact-strip {
  padding: var(--space-8);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-primary));
  border: 1px solid var(--color-border-strong);
  text-align: center;
}

.contact-strip h2 {
  margin-bottom: var(--space-3);
}

.contact-strip p {
  margin-bottom: var(--space-6);
}

.contact-strip__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  justify-content: center;
  align-items: center;
}