/* =============================================
   PLUS CHINESE — Modern EdTech Design
   ============================================= */

:root {
  --red: #C8102E;
  --red-light: #e8193a;
  --red-pale: #fff1f3;
  --dark: #0f0f0f;
  --dark-2: #1a1a1a;
  --gray: #f5f5f7;
  --gray-2: #e8e8ec;
  --text: #1a1a2e;
  --text-muted: #6b7280;
  --white: #ffffff;
  --accent: #ff6b35;
  --gold: #f59e0b;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--white);
  color: var(--text);
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1140px;
  margin: auto;
}

/* =============================================
   HEADER
   ============================================= */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
  padding: 14px 0;
}

header.scrolled {
  border-bottom-color: var(--gray-2);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo-link { display: flex; align-items: center; }
.logo { height: 54px; }

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn-primary {
  display: inline-block;
  background: var(--red);
  color: var(--white);
  padding: 12px 26px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  transition: all 0.25s ease;
  white-space: nowrap;
  border: 2px solid var(--red);
}

.btn-primary:hover {
  background: var(--red-light);
  border-color: var(--red-light);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200,16,46,0.3);
}

.btn-primary.large {
  padding: 16px 36px;
  font-size: 16px;
}

.btn-primary.full { width: 100%; text-align: center; }

.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--text);
  padding: 14px 26px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 2px solid var(--gray-2);
  transition: all 0.25s ease;
}

.btn-ghost:hover {
  border-color: var(--text);
  background: var(--text);
  color: white;
}

.btn-outline-dark {
  display: inline-block;
  background: transparent;
  color: var(--red);
  padding: 12px 26px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: 2px solid var(--red);
  transition: all 0.25s ease;
}

.btn-outline-dark:hover {
  background: var(--red);
  color: white;
  transform: translateY(-1px);
}

.btn-outline-dark.full { width: 100%; text-align: center; }

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.blob1 {
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--red) 0%, transparent 70%);
  top: -200px;
  right: -100px;
}

.blob2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--gold) 0%, transparent 70%);
  bottom: -150px;
  left: -100px;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--red-pale);
  color: var(--red);
  border: 1px solid rgba(200,16,46,0.2);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  animation: fadeUp 0.6s ease both;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  animation: fadeUp 0.6s ease 0.1s both;
}

.highlight {
  color: var(--red);
  position: relative;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 24px;
  animation: fadeUp 0.6s ease 0.2s both;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 32px;
  animation: fadeUp 0.6s ease 0.25s both;
}

.hero-tags span {
  background: var(--gray);
  color: var(--text);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 40px;
  animation: fadeUp 0.6s ease 0.3s both;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 20px;
  animation: fadeUp 0.6s ease 0.4s both;
}

.trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.trust-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
}

.trust-item span:last-child {
  font-size: 12px;
  color: var(--text-muted);
}

.trust-divider {
  width: 1px;
  height: 36px;
  background: var(--gray-2);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 460px;
  animation: fadeUp 0.6s ease 0.3s both;
}

.hero-char {
  font-family: 'Noto Serif SC', serif;
  font-size: 220px;
  color: var(--red);
  opacity: 0.08;
  user-select: none;
  position: absolute;
  line-height: 1;
}

.hero-card-float {
  position: absolute;
  background: white;
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 230px;
  border: 1px solid var(--gray-2);
  z-index: 2;
}

.card-f1 {
  top: 60px;
  left: 10px;
  animation: float1 3s ease-in-out infinite;
}

.card-f2 {
  bottom: 60px;
  right: 10px;
  animation: float2 3.5s ease-in-out infinite;
}

.card-icon { font-size: 28px; flex-shrink: 0; }

.hero-card-float strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 2px;
}

.hero-card-float p {
  font-size: 12px;
  color: var(--text-muted);
  margin: 0;
}

/* =============================================
   STRIP
   ============================================= */
.strip {
  background: var(--dark);
  padding: 20px 0;
}

.strip-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.strip-inner > span {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  font-weight: 500;
}

.strip-logos {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.industry-tag {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 500;
  border: 1px solid rgba(255,255,255,0.1);
}

/* =============================================
   SECTIONS
   ============================================= */
.section {
  padding: 100px 0;
}

.bg-subtle {
  background: #fafafa;
}

.section-label {
  display: inline-block;
  background: var(--red-pale);
  color: var(--red);
  border: 1px solid rgba(200,16,46,0.15);
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-header p {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 500px;
  margin: 0 auto;
}

h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

/* =============================================
   ABOUT
   ============================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-img-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.about-char-bg {
  font-family: 'Noto Serif SC', serif;
  font-size: 260px;
  color: var(--red);
  opacity: 0.06;
  line-height: 1;
  position: relative;
}

.about-badge-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: absolute;
  bottom: -20px;
}

.about-badge {
  background: white;
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-2);
}

.badge-icon { font-size: 22px; }

.about-badge strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
}

.about-badge small {
  font-size: 12px;
  color: var(--text-muted);
}

.about-text p {
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
  font-size: 16px;
}

.about-list {
  list-style: none;
  margin: 24px 0 32px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.about-list li {
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
}

/* =============================================
   COURSES
   ============================================= */
.courses-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  max-width: 860px;
  margin: 0 auto 32px;
}

.course-card {
  background: white;
  border: 1px solid var(--gray-2);
  border-radius: var(--radius);
  padding: 36px 32px;
  position: relative;
  transition: all 0.3s ease;
}

.course-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.course-card.popular {
  border-color: var(--red);
  border-width: 2px;
}

.popular-badge, .premium-badge {
  position: absolute;
  top: -13px;
  left: 24px;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.popular-badge {
  background: var(--red);
  color: white;
}

.premium-badge {
  background: var(--text);
  color: white;
}

.course-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.course-card h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.course-desc {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 24px;
}

.course-features {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.course-features li {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.course-price {
  margin-bottom: 24px;
  padding: 16px 0;
  border-top: 1px solid var(--gray-2);
  border-bottom: 1px solid var(--gray-2);
}

.price-amount {
  font-size: 34px;
  font-weight: 800;
  color: var(--red);
}

.price-unit {
  font-size: 14px;
  color: var(--text-muted);
  margin-left: 6px;
}

.note {
  text-align: center;
  font-size: 15px;
  color: var(--text-muted);
  font-weight: 500;
}

/* =============================================
   HOW IT WORKS
   ============================================= */
.steps-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.step {
  background: white;
  border: 1px solid var(--gray-2);
  border-radius: var(--radius);
  padding: 36px 28px;
  text-align: center;
  flex: 1;
  max-width: 280px;
  transition: all 0.3s ease;
}

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

.step-num {
  font-size: 48px;
  font-weight: 900;
  color: var(--red);
  opacity: 0.15;
  line-height: 1;
  margin-bottom: 16px;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.step h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

.step-arrow {
  font-size: 28px;
  color: var(--red);
  opacity: 0.4;
  padding: 0 16px;
  flex-shrink: 0;
  font-weight: 300;
}

/* =============================================
   TESTIMONIALS
   ============================================= */
.rating-summary {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.stars {
  color: var(--gold);
  font-size: 20px;
  letter-spacing: 2px;
}

.rating-summary strong { font-size: 18px; }
.rating-summary span { color: var(--text-muted); font-size: 14px; }

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.tcard {
  background: white;
  border: 1px solid var(--gray-2);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s ease;
}

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

.tcard-stars {
  color: var(--gold);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.tcard p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 20px;
  font-style: italic;
}

.tcard-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--red);
  color: white;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}

.tcard-author strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
}

.tcard-author small {
  font-size: 12px;
  color: var(--text-muted);
}

/* =============================================
   BOOKING
   ============================================= */
.calendar-wrap {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--gray-2);
  box-shadow: var(--shadow);
}

/* =============================================
   CONTACT
   ============================================= */
.contact-section {
  background: #f8f9fa;
  color: var(--text);
}

.contact-section.gradient-bg {
  background: linear-gradient(135deg, #f5f7fa 0%, #eff3f8 100%);
  color: var(--text);
}

.contact-section.gradient-bg .section-label {
  background: var(--red-pale);
  color: var(--red);
  border-color: rgba(200,16,46,0.15);
}

.contact-section.gradient-bg h2 {
  color: var(--text);
}

.contact-section.gradient-bg p {
  color: var(--text-muted);
}

.contact-section.gradient-bg .contact-item {
  color: var(--text);
  background: white;
  border: 1px solid var(--gray-2);
}

.contact-section.gradient-bg .contact-item:hover {
  background-color: var(--gray);
  border-color: var(--gray-2);
  box-shadow: var(--shadow);
}

.contact-section.gradient-bg .contact-item small {
  color: var(--text-muted);
}

.contact-section.gradient-bg .contact-cta-box {
  background-color: white;
  border: 1px solid var(--gray-2);
  box-shadow: var(--shadow);
}

.contact-section.gradient-bg .contact-cta-box h3,
.contact-section.gradient-bg .contact-cta-box p {
  color: var(--text);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.light-label {
  background: var(--red-pale);
  color: var(--red);
  border-color: rgba(200,16,46,0.3);
}

.contact-section h2 {
  color: var(--text);
  margin-bottom: 12px;
}

.contact-text p {
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: white;
  border: 1px solid var(--gray-2);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.25s ease;
}

.contact-item:hover {
  background: var(--gray);
  border-color: var(--gray-2);
  box-shadow: var(--shadow);
}

.ci-icon { font-size: 24px; flex-shrink: 0; }

.contact-item small {
  display: block;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
}

.contact-item strong {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.contact-cta-box {
  background: white;
  border: 1px solid var(--gray-2);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-align: center;
  box-shadow: var(--shadow);
}

.cta-char {
  font-family: 'Noto Serif SC', serif;
  font-size: 80px;
  color: var(--red);
  opacity: 0.08;
  line-height: 1;
  margin-bottom: 16px;
}

.contact-cta-box h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
}

.contact-cta-box p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 28px;
}

.contact-cta-box .btn-primary {
  display: block;
}

/* =============================================
   FOOTER
   ============================================= */
footer {
  padding: 2rem 0;
  text-align: center;
}

footer.gradient-bg {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #f0f0f0;
}

footer p {
  margin: 0 0 1.5rem 0;
  color: #d0d0d0;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.footer-links a {
  color: #a8d5ff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float1 {
  0%, 100% { transform: translateY(0px) rotate(-2deg); }
  50% { transform: translateY(-12px) rotate(1deg); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0px) rotate(2deg); }
  50% { transform: translateY(-16px) rotate(-1deg); }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-visual { display: none; }

  .hero-ctas {
    justify-content: center;
  }

  .hero-trust { justify-content: center; }

  .hero-tags { justify-content: center; }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-img-wrap { display: none; }

  .courses-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
  }

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

  .steps-grid {
    flex-direction: column;
    gap: 16px;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 0;
  }

  .step { max-width: 100%; }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .nav-links { display: none; }

  .hamburger { display: block; }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 600px) {
  .section { padding: 70px 0; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 32px; }
  .strip-inner { flex-direction: column; gap: 12px; }
}