/* ====== CSS Variables ====== */
:root {
  --primary: #4A90D9;
  --primary-dark: #357ABD;
  --primary-light: #EBF4FF;
  --secondary: #5EC4B5;
  --secondary-dark: #4AB0A0;
  --accent: #FF8C42;
  --accent-light: #FFF0E6;
  --purple: #8B7FD3;
  --purple-light: #F0EDFF;
  --bg-light: #F8FAFE;
  --bg-warm: #FFFDF7;
  --text-dark: #2D3748;
  --text-gray: #718096;
  --text-light: #A0AEC0;
  --card-bg: #FFFFFF;
  --shadow-sm: 0 2px 8px rgba(74,144,217,0.08);
  --shadow: 0 8px 30px rgba(74,144,217,0.10);
  --shadow-hover: 0 12px 40px rgba(74,144,217,0.18);
  --shadow-lg: 0 20px 60px rgba(74,144,217,0.15);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
}

/* ====== Reset & Base ====== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ====== Section Common ====== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt { background: var(--bg-warm); }
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-gray);
  max-width: 600px;
  margin: 0 auto;
}
.section-bridge {
  text-align: center;
  margin-top: 48px;
  padding: 24px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  border-radius: var(--radius);
  color: var(--text-dark);
  font-size: 1.1rem;
  font-weight: 500;
}

/* ====== Navigation ====== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
#navbar.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 1px 20px rgba(0,0,0,0.08);
  padding: 10px 0;
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  color: var(--accent);
  font-size: 1.4rem;
}
#navbar.scrolled .logo { color: var(--text-dark); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 0.95rem;
  color: var(--text-gray);
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}
#navbar.scrolled .nav-link { color: var(--text-gray); }
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: var(--transition);
}
.nav-link:hover::after { width: 100%; }
.nav-link:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 24px;
  border-radius: 20px;
  font-weight: 600;
  transition: var(--transition);
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 15px rgba(74,144,217,0.3); }

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  width: 28px; height: 22px;
  flex-direction: column;
  justify-content: space-between;
  padding: 0;
  z-index: 1001;
}
.mobile-toggle span {
  display: block;
  width: 100%; height: 2.5px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}
.mobile-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(6px, 7px); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* ====== Hero ====== */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background: linear-gradient(135deg, #4A90D9 0%, #5EC4B5 50%, #8B7FD3 100%);
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.12;
}
.shape-1 {
  width: 500px; height: 500px;
  background: #fff;
  top: -150px; right: -100px;
  animation: floatShape 20s ease-in-out infinite;
}
.shape-2 {
  width: 300px; height: 300px;
  background: #fff;
  bottom: -50px; left: -80px;
  animation: floatShape 25s ease-in-out infinite reverse;
}
.shape-3 {
  width: 200px; height: 200px;
  background: #fff;
  top: 40%; left: 10%;
  animation: floatShape 18s ease-in-out infinite 2s;
}
.shape-4 {
  width: 150px; height: 150px;
  background: #fff;
  top: 20%; right: 25%;
  animation: floatShape 22s ease-in-out infinite 4s;
}
@keyframes floatShape {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 800px;
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  padding: 8px 24px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 3px;
  margin-bottom: 24px;
  border: 1px solid rgba(255,255,255,0.25);
}
.hero-content h1 {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 8px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.1);
}
.hero-subtitle {
  font-size: 1.4rem;
  font-weight: 400;
  opacity: 0.95;
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 1.1rem;
  opacity: 0.85;
  line-height: 1.8;
  margin-bottom: 40px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font);
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  border-radius: 50px;
  text-align: center;
}
.btn-primary {
  background: #fff;
  color: var(--primary);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.5);
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}
.btn-lg { padding: 14px 36px; font-size: 1rem; }
.btn-block { width: 100%; }
.hero-wave {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  line-height: 0;
}
.hero-wave svg { width: 100%; height: auto; display: block; }

/* ====== Cards ====== */
.cards-grid {
  display: grid;
  gap: 24px;
}
.cards-grid-5 { grid-template-columns: repeat(5, 1fr); }
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  opacity: 0;
  transform: translateY(30px);
}
.card.visible {
  opacity: 1;
  transform: translateY(0);
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.pain-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.card p {
  font-size: 0.9rem;
  color: var(--text-gray);
  line-height: 1.6;
}

/* ====== Philosophy ====== */
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.philosophy-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  gap: 20px;
  opacity: 0;
  transform: translateY(30px);
  border-left: 4px solid var(--primary);
}
.philosophy-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.philosophy-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.philosophy-card[data-color="blue"] { border-left-color: var(--primary); }
.philosophy-card[data-color="teal"] { border-left-color: var(--secondary); }
.philosophy-card[data-color="orange"] { border-left-color: var(--accent); }
.philosophy-card[data-color="purple"] { border-left-color: var(--purple); }
.phil-icon {
  font-size: 2.8rem;
  flex-shrink: 0;
  width: 64px;
  text-align: center;
}
.phil-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.phil-subtitle {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.phil-content p {
  color: var(--text-gray);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ====== Timeline ====== */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 100px;
  top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary), var(--purple));
  border-radius: 2px;
}
.timeline-item {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 24px;
  opacity: 0;
  transform: translateX(-20px);
  transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.timeline-item.visible {
  opacity: 1;
  transform: translateX(0);
}
.timeline-dot {
  flex-shrink: 0;
  width: 18px; height: 18px;
  margin-top: 18px;
  margin-left: 91px;
  background: #fff;
  border: 3px solid var(--primary);
  border-radius: 50%;
  z-index: 2;
  position: relative;
}
.timeline-time {
  flex-shrink: 0;
  width: 76px;
  padding-top: 14px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  text-align: right;
  line-height: 1.3;
}
.timeline-time span { font-weight: 400; color: var(--text-light); }
.timeline-card {
  flex: 1;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border-left: 3px solid var(--primary);
}
.timeline-card:hover {
  box-shadow: var(--shadow);
  transform: translateX(4px);
}
.timeline-card.card-rest { border-left-color: var(--secondary); }
.timeline-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-card p {
  font-size: 0.88rem;
  color: var(--text-gray);
}

/* ====== Features ====== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
  opacity: 0;
  transform: translateY(30px);
}
.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.feature-number {
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 0.92rem;
  color: var(--text-gray);
  line-height: 1.7;
}
.closing-quote {
  text-align: center;
  margin-top: 60px;
  padding: 32px 40px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  border-radius: var(--radius-lg);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--text-dark);
  line-height: 1.8;
}
.highlight {
  color: var(--accent);
  font-weight: 800;
}

/* ====== Enrollment ====== */
.enroll-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}
.enroll-info {
  background: linear-gradient(135deg, var(--primary), var(--secondary-dark));
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  color: #fff;
}
.enroll-benefits h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
}
.enroll-benefits ul {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 36px;
}
.enroll-benefits li {
  font-size: 0.95rem;
  line-height: 1.5;
  opacity: 0.92;
}
.enroll-contact { border-top: 1px solid rgba(255,255,255,0.2); padding-top: 24px; }
.contact-label {
  font-size: 0.8rem;
  opacity: 0.7;
  letter-spacing: 1px;
  margin-bottom: 4px;
}
.contact-phone {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.contact-addr {
  font-size: 1rem;
  opacity: 0.9;
}

/* Form */
.enroll-form {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-lg);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dark);
}
.required { color: #E53E3E; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #E2E8F0;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text-dark);
  transition: var(--transition);
  background: var(--bg-light);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74,144,217,0.15);
  background: #fff;
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-top: 16px;
}

/* Submit Button State */
.submit-success .btn-text { display: none; }
.submit-success .btn-loading { display: none !important; }
.btn-success {
  background: #48BB78 !important;
  color: #fff !important;
  cursor: default !important;
}

/* ====== Footer ====== */
#footer {
  background: var(--text-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 0;
  text-align: center;
}
.footer-brand {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.footer-tagline {
  font-size: 0.95rem;
  margin-bottom: 24px;
}
.footer-divider {
  width: 60px; height: 2px;
  background: rgba(255,255,255,0.2);
  margin: 0 auto 20px;
}
.footer-copy { font-size: 0.85rem; }

/* ====== Animations ====== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ====== Responsive ====== */
@media (max-width: 1024px) {
  .cards-grid-5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-header h2 { font-size: 1.6rem; }
  .container { padding: 0 20px; }

  /* Nav */
  .mobile-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 280px; height: 100vh;
    background: #fff;
    flex-direction: column;
    padding: 80px 32px 40px;
    gap: 20px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    transition: var(--transition);
    align-items: flex-start;
  }
  .nav-links.active { right: 0; }
  .nav-link { font-size: 1.1rem; }

  /* Hero */
  .hero-content h1 { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1.1rem; }
  .hero-desc { font-size: 1rem; }
  .btn-lg { padding: 12px 28px; font-size: 0.95rem; }

  /* Cards */
  .cards-grid-5 { grid-template-columns: repeat(2, 1fr); }

  /* Philosophy */
  .philosophy-grid { grid-template-columns: 1fr; gap: 20px; }
  .philosophy-card { padding: 28px 24px; flex-direction: column; text-align: center; gap: 12px; }
  .phil-icon { margin: 0 auto; }

  /* Timeline */
  .timeline::before { left: 6px; }
  .timeline-item {
    flex-direction: column;
    gap: 8px;
    padding-left: 36px;
  }
  .timeline-time {
    width: auto;
    text-align: left;
    display: inline-block;
    padding: 2px 12px;
    background: var(--primary-light);
    border-radius: 12px;
    font-size: 0.75rem;
  }
  .timeline-dot {
    position: absolute;
    left: 0;
    margin-left: 0;
    width: 14px; height: 14px;
  }

  /* Features */
  .features-grid { grid-template-columns: 1fr; gap: 20px; }
  .closing-quote { font-size: 1.05rem; padding: 24px; }

  /* Enroll */
  .enroll-wrapper { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .enroll-form { padding: 28px 24px; }
  .enroll-info { padding: 28px 24px; }
}

@media (max-width: 480px) {
  .hero-content h1 { font-size: 2rem; }
  .hero-subtitle { font-size: 1rem; }
  .cards-grid-5 { grid-template-columns: 1fr; }
  .section-header h2 { font-size: 1.35rem; }
}