/* ============================================================
   学霸之家 — Design System (UUPM Generated)
   Color: Sky Blue #0EA5E9 / CTA Orange #F97316
   Font: Noto Serif SC + Noto Sans SC
   ============================================================ */

/* === CSS Variables === */
:root {
  --color-primary: #0EA5E9;
  --color-primary-dark: #0284C7;
  --color-secondary: #38BDF8;
  --color-cta: #F97316;
  --color-cta-hover: #EA580C;
  --color-background: #F0F9FF;
  --color-surface: #FFFFFF;
  --color-text: #0C4A6E;
  --color-text-light: #64748B;
  --color-text-muted: #94A3B8;
  --color-border: #E2E8F0;
  --color-border-light: #F1F5F9;

  --font-heading: 'Noto Serif SC', serif;
  --font-body: 'Noto Sans SC', sans-serif;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --transition: 200ms ease;
  --transition-slow: 400ms ease;
}

/* === Reset & Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* === Animations === */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

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

  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* === Navbar === */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(240, 249, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
}

.nav-logo {
  color: var(--color-cta);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
  cursor: pointer;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-cta {
  background: var(--color-cta) !important;
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
  transition: all var(--transition) !important;
}

.nav-cta:hover {
  background: var(--color-cta-hover) !important;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  justify-content: center;
}

.btn-primary {
  background: var(--color-cta);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-cta-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.05rem;
}

.btn-block {
  width: 100%;
}

/* === Section Common === */
section {
  padding: var(--space-4xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(56, 189, 248, 0.1));
  color: var(--color-primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
  letter-spacing: 0.5px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.3;
}

.section-desc {
  color: var(--color-text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* === Hero === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(165deg, #F0F9FF 0%, #E0F2FE 40%, #BAE6FD 100%);
  padding-top: 80px;
}

.hero-bg-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
}

.shape-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--color-primary) 0%, transparent 70%);
  top: -100px;
  right: -100px;
  animation: float 8s ease-in-out infinite;
}

.shape-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, var(--color-cta) 0%, transparent 70%);
  bottom: -50px;
  left: -50px;
  animation: float 10s ease-in-out infinite reverse;
}

.shape-3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, var(--color-secondary) 0%, transparent 70%);
  top: 40%;
  left: 60%;
  animation: float 7s ease-in-out infinite 2s;
}

@keyframes float {

  0%,
  100% {
    transform: translate(0, 0);
  }

  50% {
    transform: translate(20px, -30px);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  color: var(--color-cta);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(249, 115, 22, 0.2);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: var(--space-lg);
}

.hero-title-sub {
  display: block;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-text-light);
  margin-top: var(--space-sm);
  font-family: var(--font-body);
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

.stat {
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-suffix {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-cta);
}

.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--color-border);
}

/* === Features === */
.features {
  background: var(--color-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-background);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.15);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(14, 165, 233, 0.05));
  color: var(--color-primary);
  margin: 0 auto var(--space-md);
}

.feature-icon--guarantee {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(249, 115, 22, 0.05));
  color: var(--color-cta);
}

.feature-icon--teacher {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
  color: #10B981;
}

.feature-icon--reward {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1), rgba(139, 92, 246, 0.05));
  color: #8B5CF6;
}

.feature-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* === Team === */
.team {
  background: var(--color-background);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  max-width: 900px;
  margin: 0 auto;
}

.team-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-xl) var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
  transition: all var(--transition);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
}

.team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.team-avatar {
  position: relative;
  display: inline-block;
  margin-bottom: var(--space-md);
}

.team-avatar-inner {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
}

.team-avatar-img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  border: 3px solid var(--color-primary);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
}

.team-avatar-img--secondary {
  border-color: var(--color-cta);
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.2);
}

.team-avatar--secondary {
  background: linear-gradient(135deg, var(--color-cta), #FBBF24) !important;
}

.team-badge-role {
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-cta);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.team-name {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 2px;
}

.team-role {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.team-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  justify-content: center;
  margin-bottom: var(--space-md);
}

.team-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(14, 165, 233, 0.08);
  color: var(--color-primary);
}

.team-tag--gold {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(251, 191, 36, 0.1));
  color: var(--color-cta);
}

.team-bio {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

.team-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.team-highlight {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  justify-content: center;
}

/* Team Subtitle */
.team-subtitle {
  text-align: center;
  margin-top: var(--space-3xl);
  margin-bottom: var(--space-xl);
}

.team-subtitle h3 {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

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

/* Teacher Mini Cards Grid */
.team-teachers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.teacher-mini-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition);
  cursor: pointer;
}

.teacher-mini-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(14, 165, 233, 0.2);
}

.teacher-mini-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin: 0 auto var(--space-sm);
}

.teacher-mini-photo {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center 20%;
  margin: 0 auto var(--space-sm);
  display: block;
  border: 2px solid var(--color-border-light);
  transition: all var(--transition);
}

.teacher-mini-card:hover .teacher-mini-photo {
  border-color: var(--color-primary);
  box-shadow: 0 4px 12px rgba(14, 165, 233, 0.2);
  transform: scale(1.05);
}

.teacher-mini-card:nth-child(2n) .teacher-mini-avatar {
  background: linear-gradient(135deg, #10B981, #34D399);
}

.teacher-mini-card:nth-child(3n) .teacher-mini-avatar {
  background: linear-gradient(135deg, #8B5CF6, #A78BFA);
}

.teacher-mini-card:nth-child(4n) .teacher-mini-avatar {
  background: linear-gradient(135deg, var(--color-cta), #FBBF24);
}

.teacher-mini-card h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.teacher-style {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.teacher-desc {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* === Pricing === */
.pricing {
  background: var(--color-surface);
}

.pricing-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  background: var(--color-background);
  padding: 4px;
  border-radius: var(--radius-full);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

.tab-btn {
  padding: 10px 28px;
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text-light);
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn.active {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.tab-btn:hover:not(.active) {
  color: var(--color-primary);
}

.pricing-grid {
  display: none;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
}

.pricing-grid.active {
  display: grid;
}

.price-card {
  background: var(--color-background);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  transition: all var(--transition);
  border: 2px solid transparent;
  position: relative;
  cursor: pointer;
}

.price-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(14, 165, 233, 0.2);
}

.price-card--featured {
  border-color: var(--color-primary);
  background: linear-gradient(170deg, #F0F9FF, #E0F2FE);
}

.price-popular {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.price-badge {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.price-currency {
  font-size: 1.2rem;
  vertical-align: top;
}

.price-unit {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-weight: 400;
}

.price-features {
  text-align: left;
  margin-bottom: var(--space-lg);
}

.price-features li {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.price-features svg {
  color: #10B981;
  flex-shrink: 0;
}

/* === Cases === */
.cases {
  background: var(--color-background);
}

.cases-carousel {
  position: relative;
  overflow: hidden;
}

.cases-track {
  display: flex;
  transition: transform 0.5s ease;
}

.case-card {
  min-width: 100%;
  padding: var(--space-xl);
  box-sizing: border-box;
}

@media (min-width: 768px) {
  .case-card {
    min-width: 50%;
  }
}

@media (min-width: 1024px) {
  .case-card {
    min-width: 33.333%;
  }
}

.case-card>* {
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.case-card {
  display: flex;
  flex-direction: column;
}

.case-card>.case-stars,
.case-card>.case-text,
.case-card>.case-author {
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
}

.case-stars {
  display: flex;
  gap: 2px;
  margin-bottom: var(--space-md);
}

.case-text {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text-light);
  font-style: italic;
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-md);
  position: relative;
}

.case-text::before {
  content: '\201C';
  position: absolute;
  top: -8px;
  left: 16px;
  font-size: 3rem;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.case-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.case-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.case-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.case-grade {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.carousel-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--color-text);
}

.carousel-btn:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.carousel-dots {
  display: flex;
  gap: 6px;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
  cursor: pointer;
  transition: all var(--transition);
}

.carousel-dot.active {
  background: var(--color-primary);
  width: 24px;
  border-radius: 4px;
}

/* === Referral === */
.referral {
  background: linear-gradient(165deg, var(--color-surface), var(--color-background));
}

.referral-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.referral-desc {
  color: var(--color-text-light);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.referral-rewards {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.reward-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.reward-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(14, 165, 233, 0.05));
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.reward-icon--alt {
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.1), rgba(249, 115, 22, 0.05));
  color: var(--color-cta);
}

.reward-item strong {
  font-size: 0.95rem;
  display: block;
}

.reward-item p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.referral-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.referral-steps {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.step {
  text-align: center;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 auto var(--space-sm);
}

.step-text {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-light);
}

.step-arrow {
  color: var(--color-text-muted);
}

/* === Contact === */
.contact {
  background: var(--color-surface);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.contact-desc {
  color: var(--color-text-light);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-background);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-item strong {
  font-size: 0.9rem;
  display: block;
}

.contact-item p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.contact-form {
  background: var(--color-background);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}

.input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.12);
}

.input::placeholder {
  color: var(--color-text-muted);
}

select.input {
  cursor: pointer;
}

textarea.input {
  resize: vertical;
  min-height: 100px;
}

/* === Location/Map === */
.location {
  background: var(--color-background);
}

.map-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.map-container {
  height: 400px;
  width: 100%;
}

.map-overlay {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-md);
  z-index: 1000;
}

/* === Toast === */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  opacity: 0;
  pointer-events: none;
  z-index: 100;
  transition: all 0.35s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.toast-content {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-surface);
  border: 1px solid #10B981;
  color: #10B981;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  font-weight: 600;
  font-size: 0.9rem;
}

.toast-icon {
  flex-shrink: 0;
}

/* === Footer === */
.footer {
  background: var(--color-text);
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-xl) 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
}

.footer-text {
  font-size: 0.85rem;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .referral-content {
    grid-template-columns: 1fr;
  }

  .referral-visual {
    margin-top: var(--space-xl);
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }
}

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

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(240, 249, 255, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

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

  section {
    padding: var(--space-3xl) 0;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-title-sub {
    font-size: 1.1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }

  .stat-divider {
    width: 40px;
    height: 1px;
  }

  .features-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
  }

  .team-grid {
    grid-template-columns: 1fr;
    max-width: 450px;
  }

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

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }

  .pricing-grid.active {
    display: grid;
  }

  .referral-steps {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .container {
    padding: 0 var(--space-md);
  }
}