/* ═══════════════════════════════════════════════
   AI BUSINESS SYSTEM — Design System
   Font: Inter | Theme: Premium Dark + Gold
   ═══════════════════════════════════════════════ */

/* ── CSS Variables ── */
:root {
  /* Colors — Bright Gold */
  --gold: #f5c842;
  --gold-light: #fada6a;
  --gold-dark: #d4a520;
  --gold-glow: rgba(245, 200, 66, 0.35);
  --gold-gradient: linear-gradient(135deg, #f5c842 0%, #ffe380 50%, #f5c842 100%);
  --gold-gradient-text: linear-gradient(135deg, #fada6a 0%, #f5c842 50%, #ffe380 100%);
  
  --bg-primary: #0b0b0f;
  --bg-secondary: #12121a;
  --bg-card: rgba(28, 28, 38, 0.85);
  --bg-card-hover: rgba(40, 40, 52, 0.9);
  
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.85);
  --text-muted: rgba(255, 255, 255, 0.6);
  
  --border-subtle: rgba(255, 255, 255, 0.1);
  --border-gold: rgba(245, 200, 66, 0.35);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  /* Spacing */
  --container-width: 1200px;
  --section-padding: 100px 0;
  
  /* Effects */
  --glass: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --shadow-large: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(245, 200, 66, 0.2);
  
  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}


/* ═══════════════════════════════════════════════
   HERO SECTION
   ═══════════════════════════════════════════════ */
.hero {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  overflow: hidden;
  background: 
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(245, 200, 66, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(245, 200, 66, 0.02) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 80% 80%, rgba(245, 200, 66, 0.02) 0%, transparent 50%),
    var(--bg-primary);
  padding-bottom: 80px;
}

/* ── Ambient Glow Effects ── */
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0;
  animation: glowPulse 6s ease-in-out infinite;
}

.hero__glow--left {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(245, 200, 66, 0.08) 0%, transparent 70%);
  top: 20%;
  left: -5%;
  animation-delay: 0s;
}

.hero__glow--right {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(245, 200, 66, 0.06) 0%, transparent 70%);
  top: 30%;
  right: -5%;
  animation-delay: 2s;
}

.hero__glow--center {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245, 200, 66, 0.05) 0%, transparent 60%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation-delay: 4s;
}

@keyframes glowPulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero__glow--center {
  animation-name: glowPulseCenter;
}

@keyframes glowPulseCenter {
  0%, 100% { opacity: 0.3; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 0.7; transform: translate(-50%, -50%) scale(1.15); }
}

/* ── Particles ── */
.hero__particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  background: var(--gold);
  border-radius: 50%;
  animation: particleFloat 8s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.2; }
  25% { transform: translateY(-30px) translateX(15px); opacity: 0.5; }
  50% { transform: translateY(-15px) translateX(-10px); opacity: 0.3; }
  75% { transform: translateY(-40px) translateX(20px); opacity: 0.4; }
}

/* ── Hero Content ── */
.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 1000px;
  margin: 0 auto;
  padding: 30px 24px 10px;
}

/* ── Title ── */
.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #f5c842;
  margin-bottom: 12px;
  line-height: 1.1;
  text-shadow: 0 0 50px rgba(245, 200, 66, 0.4), 0 2px 20px rgba(245, 200, 66, 0.2);
  
  /* Entrance animation */
  opacity: 0;
  transform: translateY(30px);
  animation: heroEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) 0.2s forwards;
}

/* ── Subtitle ── */
.hero__subtitle {
  font-size: clamp(0.85rem, 2vw, 1.15rem);
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--gold);
  margin-bottom: 32px;
  text-transform: uppercase;
  
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) 0.4s forwards;
}

/* ── Quote ── */
.hero__quote {
  max-width: 700px;
  margin: 0 auto 15px;
  padding: 0 20px;
  
  opacity: 0;
  transform: translateY(20px);
  animation: heroEntrance 1s cubic-bezier(0.4, 0, 0.2, 1) 0.6s forwards;
}

.hero__quote p {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
  font-weight: 300;
}

.hero__quote strong {
  color: #f5c842;
  font-weight: 700;
  font-style: normal;
}

/* ── Showcase (Teacher + Photos) ── */
.hero__showcase {
  position: relative;
  width: 100%;
  max-width: 1000px;
  height: 520px;
  margin: 0 auto;
  
  opacity: 0;
  transform: translateY(30px);
  animation: heroEntrance 1.2s cubic-bezier(0.4, 0, 0.2, 1) 0.8s forwards;
}

/* ── Teacher Image ── */
.hero__teacher {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  width: 480px;
}

.hero__teacher-img {
  width: 100%;
  height: auto;
  filter: drop-shadow(0 10px 40px rgba(0, 0, 0, 0.5));
  position: relative;
  z-index: 2;
}

.hero__teacher-glow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 300px;
  height: 60px;
  background: radial-gradient(ellipse, rgba(245, 200, 66, 0.15) 0%, transparent 70%);
  filter: blur(20px);
  z-index: 1;
}

/* ── Photo Groups (Left & Right collages) ── */
.hero__photo-group {
  position: absolute;
  z-index: 4;
  top: 50%;
  transform: translateY(-50%);
}

.hero__photo-group--left {
  left: 0;
}

.hero__photo-group--right {
  right: 0;
}

/* ── Individual Photos ── */
.hero__photo {
  position: absolute;
  border: 3px solid rgba(255, 255, 255, 0.85);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 
    0 8px 30px rgba(0, 0, 0, 0.5),
    0 0 15px rgba(245, 200, 66, 0.08);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
              box-shadow 0.4s ease;
}

.hero__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero__photo:hover {
  transform: scale(1.05) !important;
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.6),
    0 0 25px rgba(245, 200, 66, 0.15);
  z-index: 10;
}

/* ── Left side: 2 photos stacked diagonal ── */
.hero__photo--1 {
  width: 260px;
  height: 170px;
  top: -90px;
  left: 0;
  transform: rotate(-6deg);
  z-index: 3;
  animation: photoFloat1 6s ease-in-out infinite;
}

.hero__photo--2 {
  width: 220px;
  height: 145px;
  top: 55px;
  left: 50px;
  transform: rotate(4deg);
  z-index: 2;
  animation: photoFloat2 7s ease-in-out infinite;
}

/* ── Right side: 3 photos zig-zag ── */
.hero__photo--3 {
  width: 230px;
  height: 150px;
  top: -110px;
  right: 0;
  transform: rotate(5deg);
  z-index: 3;
  animation: photoFloat3 5.5s ease-in-out infinite;
}

.hero__photo--4 {
  width: 210px;
  height: 138px;
  top: 15px;
  right: 50px;
  transform: rotate(-4deg);
  z-index: 4;
  animation: photoFloat2 6.5s ease-in-out infinite;
}

.hero__photo--5 {
  width: 200px;
  height: 132px;
  top: 130px;
  right: 10px;
  transform: rotate(3deg);
  z-index: 2;
  animation: photoFloat1 7.5s ease-in-out infinite;
}

/* ── Photo float animations ── */
@keyframes photoFloat1 {
  0%, 100% { transform: translateY(0) rotate(-6deg); }
  50% { transform: translateY(-8px) rotate(-4deg); }
}

@keyframes photoFloat2 {
  0%, 100% { transform: translateY(0) rotate(4deg); }
  50% { transform: translateY(-10px) rotate(6deg); }
}

@keyframes photoFloat3 {
  0%, 100% { transform: translateY(0) rotate(5deg); }
  50% { transform: translateY(-7px) rotate(3deg); }
}

/* ── Gold Bottom Banner ── */
.hero__bottom-banner {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  width: 90%;
  max-width: 750px;
  background: rgba(10, 10, 10, 0.7);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(245, 200, 66, 0.35);
  border-radius: 16px;
  padding: 20px 32px;
  text-align: center;
  box-shadow: 
    0 0 30px rgba(245, 200, 66, 0.1),
    0 0 60px rgba(245, 200, 66, 0.05),
    inset 0 1px 0 rgba(245, 200, 66, 0.1);
  
  /* Subtle glow animation */
  animation: bannerGlow 4s ease-in-out infinite;
}

@keyframes bannerGlow {
  0%, 100% { 
    border-color: rgba(245, 200, 66, 0.25);
    box-shadow: 0 0 20px rgba(245, 200, 66, 0.06), 0 0 40px rgba(245, 200, 66, 0.03), inset 0 1px 0 rgba(245, 200, 66, 0.08);
  }
  50% { 
    border-color: rgba(245, 200, 66, 0.5);
    box-shadow: 0 0 35px rgba(245, 200, 66, 0.15), 0 0 70px rgba(245, 200, 66, 0.06), inset 0 1px 0 rgba(245, 200, 66, 0.15);
  }
}

.hero__banner-text {
  font-size: clamp(0.82rem, 1.6vw, 0.98rem);
  color: var(--text-secondary);
  font-weight: 400;
  line-height: 1.7;
  max-width: 650px;
  margin: 0 auto;
}

.hero__banner-text strong {
  font-weight: 700;
  color: var(--gold-light);
  text-decoration: underline;
  text-decoration-color: rgba(245, 200, 66, 0.3);
  text-underline-offset: 3px;
}

.hero__banner-text em {
  font-style: italic;
  color: var(--gold);
}

/* ── Entrance Animation ── */
@keyframes heroEntrance {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


/* ═══════════════════════════════════════════════
   SECTION 2 — Form Đăng Ký + Ảnh AS2
   ═══════════════════════════════════════════════ */
.s2 {
  position: relative;
  width: 100%;
  background: var(--bg-primary);
  overflow: hidden;
}

/* ── Content Wrapper ── */
.s2__content {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Form Card ── */
.s2__form-card {
  width: 100%;
  max-width: 580px;
  background: #ffffff;
  border: 2px solid rgba(245, 200, 66, 0.4);
  border-radius: 20px;
  padding: 36px 40px 40px;
  text-align: center;
  box-shadow:
    0 0 40px rgba(245, 200, 66, 0.08),
    0 20px 60px rgba(0, 0, 0, 0.3);
}

@keyframes formCardGlow {
  0%, 100% {
    border-color: rgba(245, 200, 66, 0.25);
    box-shadow: 0 0 30px rgba(245, 200, 66, 0.04), 0 20px 60px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  }
  50% {
    border-color: rgba(245, 200, 66, 0.5);
    box-shadow: 0 0 50px rgba(245, 200, 66, 0.1), 0 20px 60px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.06);
  }
}

/* ── Form Description ── */
.s2__form-desc {
  font-size: 0.88rem;
  font-weight: 500;
  color: #333333;
  line-height: 1.7;
  margin-bottom: 20px;
  padding: 0 8px;
}

/* ── Form Title ── */
.s2__form-title {
  font-size: clamp(1.3rem, 3.5vw, 1.8rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: #b08a3a;
  margin-bottom: 28px;
  font-style: italic;
}

/* ── Form ── */
.s2__form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── Input Fields ── */
.s2__field {
  width: 100%;
}

.s2__input {
  width: 100%;
  padding: 16px 20px;
  font-family: var(--font-family);
  font-size: 0.95rem;
  font-weight: 400;
  color: #1a1a1a;
  background: #ffffff;
  border: 1.5px solid #cccccc;
  border-radius: 12px;
  outline: none;
  transition: var(--transition-smooth);
}

.s2__input::placeholder {
  color: #999999;
  font-weight: 400;
}

.s2__input:focus {
  border-color: var(--gold);
  background: #fffdf5;
  box-shadow: 0 0 0 3px rgba(245, 200, 66, 0.15);
}

.s2__input:hover:not(:focus) {
  border-color: #aaaaaa;
}

/* ── Submit Button ── */
.s2__submit {
  width: 100%;
  padding: 18px 24px;
  margin-top: 6px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #0a0a0a;
  background: linear-gradient(135deg, #f5c842 0%, #ffe380 40%, #f5c842 100%);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  box-shadow:
    0 4px 20px rgba(245, 200, 66, 0.3),
    0 0 30px rgba(245, 200, 66, 0.1);
}

.s2__submit:hover {
  transform: translateY(-2px);
  box-shadow:
    0 8px 30px rgba(245, 200, 66, 0.4),
    0 0 50px rgba(245, 200, 66, 0.15);
  background: linear-gradient(135deg, #fada6a 0%, #fff0a0 40%, #f5c842 100%);
}

.s2__submit:active {
  transform: translateY(0);
  box-shadow:
    0 2px 10px rgba(245, 200, 66, 0.25);
}

/* Shimmer effect */
.s2__submit::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  50% { left: 100%; }
  100% { left: 100%; }
}

/* ── AS2 Image ── */
.s2__image {
  width: 100%;
  margin-top: 48px;
}

.s2__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0;
}


/* ═══════════════════════════════════════════════
   SECTION 3 — Sự Thật Phũ Phàng
   ═══════════════════════════════════════════════ */
.s3 {
  background:
    radial-gradient(ellipse 70% 50% at 50% 20%, rgba(180, 40, 40, 0.06) 0%, transparent 60%),
    var(--bg-primary);
  padding: 80px 0;
}

.s3__content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

/* Label */
.s3__label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #e74c3c;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.25);
  border-radius: 30px;
  padding: 8px 24px;
  margin-bottom: 20px;
}

.s3__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.s3__subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* Problem Cards Grid */
.s3__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.s3__card {
  background: rgba(231, 76, 60, 0.06);
  border: 1px solid rgba(231, 76, 60, 0.15);
  border-radius: 16px;
  padding: 28px 16px;
  transition: var(--transition-smooth);
}

.s3__card:hover {
  background: rgba(231, 76, 60, 0.1);
  border-color: rgba(231, 76, 60, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(231, 76, 60, 0.1);
}

.s3__card-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.s3__card-title {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.5;
}

.s3__card-title strong {
  color: #e74c3c;
  font-weight: 700;
}

/* Image */
.s3__image {
  margin-bottom: 40px;
  border-radius: 16px;
  overflow: hidden;
}

.s3__img {
  width: 100%;
  height: auto;
  border-radius: 16px;
}

/* Quote */
.s3__quote {
  max-width: 700px;
  margin: 0 auto 40px;
  padding: 28px 32px;
  background: rgba(245, 200, 66, 0.06);
  border-left: 4px solid var(--gold);
  border-radius: 0 12px 12px 0;
}

.s3__quote p {
  font-size: 1.05rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.8;
}

.s3__quote strong {
  color: var(--gold-light);
  font-style: normal;
  font-weight: 700;
}

/* CTA — Shared */
.s3__cta, .s5__cta {
  text-align: center;
}

.cta-btn {
  display: inline-block;
  padding: 18px 48px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: #0a0a0a;
  background: linear-gradient(135deg, #f5c842 0%, #ffe380 40%, #f5c842 100%);
  border-radius: 12px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(245, 200, 66, 0.3), 0 0 30px rgba(245, 200, 66, 0.1);
  position: relative;
  overflow: hidden;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245, 200, 66, 0.4), 0 0 50px rgba(245, 200, 66, 0.15);
  background: linear-gradient(135deg, #fada6a 0%, #fff0a0 40%, #f5c842 100%);
}

.cta-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
  animation: shimmer 3s ease-in-out infinite;
}

.cta-viewers {
  margin-top: 14px;
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.cta-viewers strong {
  color: var(--gold-light);
}

.cta-dot {
  width: 8px;
  height: 8px;
  background: #27ae60;
  border-radius: 50%;
  display: inline-block;
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}


/* ═══════════════════════════════════════════════
   SECTION 4 — Kỷ Nguyên Mới: AI First
   ═══════════════════════════════════════════════ */
.s4 {
  background:
    radial-gradient(ellipse 70% 50% at 50% 30%, rgba(245, 200, 66, 0.05) 0%, transparent 60%),
    var(--bg-secondary);
  padding: 80px 0;
}

.s4__content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.s4__label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  background: rgba(245, 200, 66, 0.08);
  border: 1px solid rgba(245, 200, 66, 0.25);
  border-radius: 30px;
  padding: 8px 24px;
  margin-bottom: 20px;
}

.s4__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.s4__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

.s4__subtitle strong {
  color: var(--gold-light);
}

/* Image */
.s4__image {
  margin-bottom: 40px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-gold);
}

.s4__img {
  width: 100%;
  height: auto;
  border-radius: 16px;
}

/* Feature Cards */
.s4__features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 36px;
  text-align: left;
}

.s4__feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 24px;
  transition: var(--transition-smooth);
}

.s4__feature:hover {
  background: rgba(245, 200, 66, 0.06);
  border-color: var(--border-gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.s4__feature-num {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--gold);
  min-width: 40px;
  line-height: 1;
  opacity: 0.7;
}

.s4__feature-title {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Conclusion */
.s4__conclusion {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.s4__conclusion strong {
  color: var(--gold-light);
  font-weight: 700;
}


/* ═══════════════════════════════════════════════
   SECTION 5 — AI Business System Là Gì?
   ═══════════════════════════════════════════════ */
.s5 {
  background:
    radial-gradient(ellipse 60% 40% at 50% 60%, rgba(245, 200, 66, 0.04) 0%, transparent 60%),
    var(--bg-primary);
  padding: 80px 0;
}

.s5__content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.s5__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.s5__subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 36px;
}

/* Image */
.s5__image {
  margin-bottom: 40px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-gold);
}

.s5__img {
  width: 100%;
  height: auto;
  border-radius: 16px;
}

/* Pillar Cards */
.s5__pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.s5__pillar {
  background: rgba(245, 200, 66, 0.04);
  border: 1px solid var(--border-gold);
  border-radius: 16px;
  padding: 32px 20px;
  transition: var(--transition-smooth);
}

.s5__pillar:hover {
  background: rgba(245, 200, 66, 0.08);
  border-color: rgba(245, 200, 66, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.3), 0 0 20px rgba(245, 200, 66, 0.06);
}

.s5__pillar-icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.s5__pillar-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold-light);
  margin-bottom: 10px;
}

.s5__pillar-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}


/* ═══════════════════════════════════════════════
   SECTION 6 — 8 Trụ Cột Cốt Lõi (Numbered List)
   ═══════════════════════════════════════════════ */
.s6 {
  background: var(--bg-secondary);
  padding: 90px 0;
  position: relative;
  overflow: hidden;
}

.s6::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, rgba(245, 200, 66, 0.15), transparent);
}

.s6__content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.s6__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.2;
}

.s6__subtitle {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 50px;
}

/* Item List */
.s6__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.s6__item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 28px;
  border-radius: 14px;
  transition: var(--transition-smooth);
  text-align: left;
  position: relative;
}

.s6__item:nth-child(odd) {
  background: rgba(245, 200, 66, 0.03);
}

.s6__item:hover {
  background: rgba(245, 200, 66, 0.07);
  transform: translateX(8px);
}

.s6__num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--gold);
  min-width: 56px;
  text-align: center;
  line-height: 1;
  opacity: 0.8;
  text-shadow: 0 0 20px rgba(245, 200, 66, 0.3);
}

.s6__line {
  width: 3px;
  height: 32px;
  background: linear-gradient(to bottom, var(--gold), rgba(245, 200, 66, 0.2));
  border-radius: 2px;
  flex-shrink: 0;
}

.s6__text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.s6__text strong {
  color: var(--gold-light);
  font-weight: 700;
}


/* ═══════════════════════════════════════════════
   SECTION 7 — Lộ Trình 3 Ngày (Timeline Cards)
   ═══════════════════════════════════════════════ */
.s7 {
  background:
    radial-gradient(ellipse 80% 50% at 50% 30%, rgba(245, 200, 66, 0.03) 0%, transparent 60%),
    var(--bg-primary);
  padding: 90px 0;
}

.s7__content {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.s7__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 50px;
  line-height: 1.2;
}

/* Timeline */
.s7__timeline {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin-bottom: 50px;
}

.s7__connector {
  padding: 8px 0;
  opacity: 0.6;
}

/* Day Card */
.s7__day {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 32px;
  text-align: left;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.s7__day::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  border-radius: 18px 0 0 18px;
}

/* Color accents per day */
.s7__day[data-day="1"]::before { background: linear-gradient(to bottom, #4ea8de, #247ba0); }
.s7__day[data-day="2"]::before { background: linear-gradient(to bottom, #a855f7, #7c3aed); }
.s7__day[data-day="3"]::before { background: linear-gradient(to bottom, #22c55e, #16a34a); }

.s7__day:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Day Header */
.s7__day-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
}

.s7__day-badge {
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  flex-shrink: 0;
}

.s7__day-badge--1 { background: rgba(78, 168, 222, 0.15); color: #7dd3fc; border: 1px solid rgba(78, 168, 222, 0.3); }
.s7__day-badge--2 { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.s7__day-badge--3 { background: rgba(34, 197, 94, 0.15); color: #86efac; border: 1px solid rgba(34, 197, 94, 0.3); }

.s7__day-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.03em;
}

/* Day List */
.s7__day-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.s7__day-list li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 24px;
  position: relative;
}

.s7__day-list li::before {
  content: '✦';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 0.7rem;
  top: 4px;
}

/* CTA */
.s7__cta {
  text-align: center;
}


/* ═══════════════════════════════════════════════
   SECTION 8 — AI Agents Hub + Department Grid
   ═══════════════════════════════════════════════ */
.s8 {
  background:
    radial-gradient(circle at 50% 20%, rgba(245, 200, 66, 0.06) 0%, transparent 50%),
    var(--bg-secondary);
  padding: 90px 0;
  position: relative;
}

.s8__content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.s8__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 48px;
  line-height: 1.2;
}

/* ── Core Engine Hub ── */
.s8__hub {
  position: relative;
  max-width: 600px;
  margin: 0 auto 56px;
  padding: 36px 40px 28px;
  background: linear-gradient(145deg, rgba(245, 200, 66, 0.08), rgba(245, 200, 66, 0.02));
  border: 1.5px solid rgba(245, 200, 66, 0.3);
  border-radius: 24px;
  overflow: hidden;
}

.s8__hub-glow {
  position: absolute;
  top: -40px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(245, 200, 66, 0.2) 0%, transparent 70%);
  filter: blur(40px);
  animation: hubPulse 4s ease-in-out infinite;
  pointer-events: none;
}

@keyframes hubPulse {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.2); }
}

.s8__hub-inner {
  position: relative;
  z-index: 1;
}

.s8__hub-icon {
  font-size: 3rem;
  margin-bottom: 8px;
  filter: drop-shadow(0 0 12px rgba(245, 200, 66, 0.4));
}

.s8__hub-title {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 6px;
  text-shadow: 0 0 20px rgba(245, 200, 66, 0.3);
}

.s8__hub-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.s8__hub-tagline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.s8__hub-sep {
  color: var(--gold);
  font-size: 1rem;
}

.s8__hub-flow {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ── Department Grid ── */
.s8__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 50px;
}

.s8__dept {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 28px 22px 24px;
  text-align: left;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

/* Colored top border per department */
.s8__dept::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.s8__dept[data-accent="finance"]::before { background: linear-gradient(90deg, #22c55e, #4ade80); }
.s8__dept[data-accent="sales"]::before { background: linear-gradient(90deg, #3b82f6, #60a5fa); }
.s8__dept[data-accent="ops"]::before { background: linear-gradient(90deg, #a855f7, #c084fc); }
.s8__dept[data-accent="hr"]::before { background: linear-gradient(90deg, #14b8a6, #5eead4); }
.s8__dept[data-accent="mkt"]::before { background: linear-gradient(90deg, #f97316, #fb923c); }
.s8__dept[data-accent="cskh"]::before { background: linear-gradient(90deg, #06b6d4, #67e8f9); }

.s8__dept:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

/* Dept Head */
.s8__dept-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.s8__dept-emoji {
  font-size: 1.6rem;
}

.s8__dept-name {
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-primary);
}

.s8__dept-stat {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 12px;
  margin-left: auto;
}

.s8__dept-stat--green { background: rgba(34, 197, 94, 0.15); color: #86efac; border: 1px solid rgba(34, 197, 94, 0.3); }
.s8__dept-stat--blue { background: rgba(59, 130, 246, 0.15); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.3); }
.s8__dept-stat--purple { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.s8__dept-stat--orange { background: rgba(249, 115, 22, 0.15); color: #fdba74; border: 1px solid rgba(249, 115, 22, 0.3); }
.s8__dept-stat--cyan { background: rgba(6, 182, 212, 0.15); color: #67e8f9; border: 1px solid rgba(6, 182, 212, 0.3); }

/* Dept List */
.s8__dept-list {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.s8__dept-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  padding-left: 18px;
  position: relative;
}

.s8__dept-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-size: 1rem;
  line-height: 1.3;
}

/* Takeaway */
.s8__dept-takeaway {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  line-height: 1.5;
}

/* CTA */
.s8__cta {
  text-align: center;
}


/* ═══════════════════════════════════════════════
   SECTION 9 — Chuyên Gia Đồng Hành (Profile Card)
   ═══════════════════════════════════════════════ */
.s9 {
  background:
    radial-gradient(ellipse 60% 50% at 30% 50%, rgba(245, 200, 66, 0.04) 0%, transparent 60%),
    var(--bg-primary);
  padding: 90px 0;
}

.s9__content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.s9__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 48px;
  line-height: 1.2;
  text-align: center;
}

/* Profile Card */
.s9__profile {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 48px;
  align-items: start;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 40px;
  position: relative;
  overflow: hidden;
}

.s9__profile::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), rgba(245, 200, 66, 0.3), transparent);
}

/* Photo Side */
.s9__photo-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.s9__photo-frame {
  position: relative;
  width: 280px;
  height: 340px;
  border-radius: 20px;
  overflow: hidden;
  border: 2px solid rgba(245, 200, 66, 0.3);
  box-shadow:
    0 0 30px rgba(245, 200, 66, 0.08),
    0 20px 50px rgba(0, 0, 0, 0.4);
}

.s9__photo-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.s9__photo-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40%;
  background: linear-gradient(to top, rgba(11, 11, 15, 0.8), transparent);
  pointer-events: none;
}

.s9__name-plate {
  text-align: center;
}

.s9__name {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  color: var(--gold);
  margin-bottom: 4px;
  text-shadow: 0 0 20px rgba(245, 200, 66, 0.25);
}

.s9__role {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* Info Side */
.s9__info-side {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
}

.s9__credentials {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 32px;
}

.s9__credential {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 12px;
  transition: var(--transition-smooth);
  border-left: 3px solid transparent;
}

.s9__credential:nth-child(odd) {
  background: rgba(245, 200, 66, 0.02);
}

.s9__credential:hover {
  background: rgba(245, 200, 66, 0.05);
  border-left-color: var(--gold);
  transform: translateX(6px);
}

.s9__credential-icon {
  width: 22px;
  height: 22px;
  color: var(--gold);
  flex-shrink: 0;
  margin-top: 2px;
}

.s9__credential-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.s9__credential-text strong {
  color: var(--gold-light);
  font-weight: 700;
}

/* CTA inside profile */
.s9__profile-cta {
  padding-top: 8px;
}


/* ═══════════════════════════════════════════════
   SECTION 10 — Lớp Học Này Dành Cho Ai (Split Cards)
   ═══════════════════════════════════════════════ */
.s10 {
  background: var(--bg-secondary);
  padding: 90px 0;
  position: relative;
}

.s10__content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.s10__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 50px;
  line-height: 1.2;
  text-align: center;
}

.s10__container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 30px;
  align-items: stretch;
  margin-bottom: 50px;
}

/* Base Card */
.s10__card {
  border-radius: 20px;
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
}

/* YES Card (Dành cho) */
.s10__card--yes {
  background: linear-gradient(145deg, rgba(245, 200, 66, 0.08), rgba(245, 200, 66, 0.02));
  border: 1.5px solid rgba(245, 200, 66, 0.4);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3), 0 0 20px rgba(245, 200, 66, 0.1);
  transform: perspective(1000px) rotateY(2deg);
}

.s10__card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 50% 50%, rgba(245, 200, 66, 0.15) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.s10__card--yes:hover .s10__card-glow {
  opacity: 1;
}

.s10__card--yes:hover {
  transform: perspective(1000px) rotateY(0deg) translateY(-5px);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.4), 0 0 30px rgba(245, 200, 66, 0.15);
}

/* NO Card (Không dành cho) */
.s10__card--no {
  background: rgba(15, 10, 15, 0.8);
  border: 1px solid rgba(220, 38, 38, 0.2);
  box-shadow: inset 0 0 20px rgba(220, 38, 38, 0.05);
  transform: perspective(1000px) rotateY(-2deg) scale(0.96);
  opacity: 0.9;
}

.s10__card--no:hover {
  opacity: 1;
  border-color: rgba(220, 38, 38, 0.4);
  transform: perspective(1000px) rotateY(0deg) scale(0.98);
}

/* Headers */
.s10__card-title {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 24px;
  position: relative;
  z-index: 1;
}

.s10__card-title--no {
  color: #fca5a5;
  opacity: 1;
}

/* Lists */
.s10__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  z-index: 1;
}

.s10__list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.s10__list--no li {
  color: var(--text-primary);
  font-size: 0.95rem;
}

/* Icons */
.s10__icon-yes {
  width: 20px;
  height: 20px;
  color: #4ade80;
  flex-shrink: 0;
  margin-top: 2px;
  filter: drop-shadow(0 0 5px rgba(74, 222, 128, 0.4));
}

.s10__icon-no {
  width: 18px;
  height: 18px;
  color: #dc2626;
  flex-shrink: 0;
  margin-top: 3px;
}

/* CTA */
.s10__cta {
  text-align: center;
}


/* ═══════════════════════════════════════════════
   SECTION 11 — KẾT QUẢ ĐẠT ĐƯỢC (Bento Grid)
   ═══════════════════════════════════════════════ */
.s11 {
  background: var(--bg-primary);
  padding: 90px 0;
  position: relative;
}

.s11__content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.s11__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 50px;
  line-height: 1.2;
  text-align: center;
}

.s11__grid {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 50px;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 24px;
  padding: 40px;
}

/* Image Side */
.s11__image-side {
  position: relative;
}

.s11__image-frame {
  width: 100%;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(245, 200, 66, 0.2);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4), 0 0 30px rgba(245, 200, 66, 0.08);
  position: relative;
}

.s11__image {
  width: 100%;
  height: auto;
  display: block;
}

.s11__image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245, 200, 66, 0.05), transparent);
  pointer-events: none;
}

/* List Side */
.s11__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.s11__list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 12px;
  transition: var(--transition-smooth);
}

.s11__list li:hover {
  background: rgba(245, 200, 66, 0.05);
  transform: translateX(5px);
}

.s11__icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  margin-top: 2px;
  color: #4ade80;
}

.s11__icon--highlight {
  color: var(--gold);
}

.s11__text {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.s11__text strong {
  color: var(--text-primary);
  font-weight: 700;
}

.s11__subtext {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}


/* ═══════════════════════════════════════════════
   SECTION 12 — KHÔNG CẦN CÔNG NGHỆ (Steps)
   ═══════════════════════════════════════════════ */
.s12 {
  background: var(--bg-secondary);
  padding: 90px 0;
}

.s12__content {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.s12__header {
  text-align: center;
  margin-bottom: 60px;
}

.s12__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.text-red {
  color: #ef4444; /* red-500 */
}

.s12__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 700px;
  margin: 0 auto;
}

.s12__subtitle strong {
  color: var(--text-primary);
  font-weight: 700;
}

.s12__steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 50px;
}

.s12__step {
  position: relative;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 20px;
  padding: 40px 30px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.s12__step:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-5px);
  border-color: rgba(245, 200, 66, 0.2);
}

.s12__step-num {
  position: absolute;
  top: -15px;
  right: -5px;
  font-size: 7rem;
  font-weight: 900;
  color: rgba(245, 200, 66, 0.05); /* very faint gold */
  line-height: 1;
  pointer-events: none;
  font-family: inherit;
  transition: color 0.3s;
}

.s12__step:hover .s12__step-num {
  color: rgba(245, 200, 66, 0.08);
}

.s12__step-title {
  position: relative;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 16px;
  z-index: 1;
}

.s12__step-desc {
  position: relative;
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  z-index: 1;
}

.s12__cta {
  text-align: center;
}

/* ═══════════════════════════════════════════════
   SECTION 13 — HỌC VIÊN NÓI GÌ (Marquee)
   ═══════════════════════════════════════════════ */
.s13 {
  background: var(--bg-primary);
  padding: 90px 0;
  overflow: hidden;
}

.s13__content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.s13__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 12px;
}

.s13__subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 50px;
}

/* Marquee wrapper */
.s13__marquee {
  width: 100%;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 6%, black 94%, transparent 100%);
  padding: 20px 0;
}

.s13__track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: s13-scroll 40s linear infinite;
  padding-left: 24px;
}

.s13__track:hover {
  animation-play-state: paused;
}

@keyframes s13-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Each feedback card */
.s13__card {
  flex-shrink: 0;
  width: 340px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 0.3s, box-shadow 0.3s;
}

.s13__card:hover {
  transform: scale(1.04);
  border-color: rgba(245, 200, 66, 0.35);
  box-shadow: 0 8px 32px rgba(245, 200, 66, 0.1), 0 0 0 1px rgba(245, 200, 66, 0.15);
}

.s13__img {
  width: 100%;
  height: auto;
  display: block;
}

.s13__cta {
  text-align: center;
  margin-top: 50px;
}


/* ═══════════════════════════════════════════════
   SECTION 14 — VIDEO GIỚI THIỆU
   ═══════════════════════════════════════════════ */
.s14 {
  background: var(--bg-secondary);
  padding: 90px 0;
}

.s14__content {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Gold gradient border frame */
.s14__frame {
  position: relative;
  padding: 4px;
  border-radius: 20px;
  background: linear-gradient(135deg, #f5c842, #d4a017, #f5c842, #b8860b, #f5c842);
  background-size: 300% 300%;
  animation: s14-border-shimmer 6s ease-in-out infinite;
  box-shadow:
    0 0 30px rgba(245, 200, 66, 0.15),
    0 0 60px rgba(245, 200, 66, 0.05),
    0 20px 60px rgba(0, 0, 0, 0.4);
}

@keyframes s14-border-shimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* 16:9 responsive video container */
.s14__video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: 16px;
  background: #000;
}

.s14__video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 16px;
}



/* ═══════════════════════════════════════════════
   SECTION 15 — CÂU HỎI THƯỜNG GẶP (FAQ)
   ═══════════════════════════════════════════════ */
.s15 {
  background: var(--bg-primary);
  padding: 90px 0;
}

.s15__content {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}

.s15__title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 50px;
}

.s15__list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 50px;
}

/* Each FAQ item */
.s15__item {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid rgba(245, 200, 66, 0.2);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.3s, background 0.3s;
}

.s15__item:hover {
  background: rgba(255, 255, 255, 0.04);
  border-left-color: rgba(245, 200, 66, 0.5);
}

.s15__item[open] {
  border-left-color: var(--gold);
  background: rgba(245, 200, 66, 0.03);
}

/* Question (clickable) */
.s15__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  cursor: pointer;
  list-style: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
  transition: color 0.3s;
}

.s15__question::-webkit-details-marker {
  display: none;
}

.s15__question::marker {
  content: '';
}

.s15__question:hover {
  color: var(--gold-light);
}

/* Chevron arrow */
.s15__chevron {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--gold);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.s15__item[open] .s15__chevron {
  transform: rotate(180deg);
}

/* Answer */
.s15__answer {
  padding: 0 24px 22px 24px;
}

.s15__answer p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.s15__answer strong {
  color: var(--gold-light);
  font-weight: 700;
}

.s15__cta {
  text-align: center;
}


/* ═══════════════════════════════════════════════
   SECTION 16 — FINAL CTA
   ═══════════════════════════════════════════════ */
.s16 {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}

.s16__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.s16__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.s16__bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 10, 20, 0.88), rgba(10, 10, 20, 0.82));
}

.s16__content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

.s16__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: stretch;
}

/* LEFT — Info card */
.s16__info {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.s16__info-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.s16__info-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.s16__info-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

/* Detail rows */
.s16__detail {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.s16__detail-icon {
  font-size: 1.4rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.s16__detail-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 4px;
}

.s16__detail-value {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.4;
}

.s16__price {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--gold);
}

.s16__detail-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 6px;
  padding: 5px 10px;
  margin-top: 6px;
}

/* Bonus */
.s16__bonus {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 16px;
  margin-top: 8px;
}

.s16__bonus-title {
  font-size: 0.82rem;
  font-weight: 800;
  color: #facc15;
  text-transform: uppercase;
  margin-bottom: 12px;
  line-height: 1.4;
}

.s16__bonus-list {
  list-style: none;
  padding: 0;
  margin: 0 0 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.s16__bonus-list li {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}

.s16__bonus-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: 900;
}

.s16__bonus-note {
  font-size: 0.78rem;
  color: #ef4444;
  font-style: italic;
}

/* RIGHT — Form card */
.s16__form-card {
  background: linear-gradient(180deg, #f5c842, #e6b422);
  border-radius: 20px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.s16__form-label {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.5);
  font-weight: 700;
  margin-bottom: 4px;
}

.s16__form-title {
  font-size: 1.8rem;
  font-weight: 900;
  color: #000;
  margin-bottom: 8px;
}

.s16__form-subtitle {
  font-size: 0.82rem;
  color: rgba(0,0,0,0.6);
  line-height: 1.5;
  margin-bottom: 20px;
}

/* Countdown */
.s16__countdown {
  display: flex;
  gap: 10px;
  margin-bottom: 22px;
}

.s16__countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.s16__countdown-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: #111;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  border-radius: 8px;
  font-variant-numeric: tabular-nums;
}

.s16__countdown-label {
  font-size: 0.65rem;
  color: rgba(0,0,0,0.5);
  text-transform: uppercase;
  font-weight: 600;
}

/* Form */
.s16__form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.s16__input {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid rgba(0,0,0,0.08);
  border-radius: 10px;
  font-size: 0.9rem;
  font-family: inherit;
  background: #fff;
  color: #111;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.s16__input:focus {
  border-color: #111;
}

.s16__input::placeholder {
  color: #aaa;
}

.s16__submit {
  width: 100%;
  padding: 16px;
  background: #111;
  color: #fff;
  font-size: 1rem;
  font-weight: 800;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: background 0.3s, transform 0.2s;
  font-family: inherit;
}

.s16__submit:hover {
  background: #222;
  transform: translateY(-2px);
}

/* Footer */
.s16__form-footer {
  border-top: 1px solid rgba(0,0,0,0.1);
  padding-top: 16px;
  width: 100%;
}

.s16__form-footer-title {
  font-size: 0.82rem;
  font-weight: 800;
  color: #111;
  text-transform: uppercase;
  line-height: 1.3;
  margin-bottom: 4px;
}

.s16__form-footer-desc {
  font-size: 0.72rem;
  color: rgba(0,0,0,0.5);
}


/* ═══════════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════════ */
.footer {
  background: #050508;
  padding: 48px 0 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.footer__content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 24px;
}

.footer__intro {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.footer__heading {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.footer__text {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.footer__link {
  color: var(--gold);
  text-decoration: none;
}

.footer__link:hover {
  text-decoration: underline;
}

.footer__policy-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.footer__policy-list li {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Disclaimer */
.footer__disclaimer {
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  margin-bottom: 20px;
}

.footer__disclaimer p {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.6;
  margin-bottom: 8px;
}

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

/* Bottom copyright */
.footer__bottom {
  text-align: center;
}

.footer__bottom p {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.2);
}


/* ═══════════════════════════════════════════════
   UTILITY CLASSES
   ═══════════════════════════════════════════════ */
.text-gold {
  color: var(--gold);
}

.text-gold-gradient {
  background: var(--gold-gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}


/* ═══════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .hero__showcase {
    height: 520px;
    max-width: 700px;
  }
  
  .hero__teacher {
    width: 400px;
  }
  
  .hero__photo--1 { width: 170px; height: 110px; }
  .hero__photo--2 { width: 145px; height: 95px; }
  .hero__photo--3 { width: 155px; height: 100px; }
  .hero__photo--4 { width: 145px; height: 95px; }
  .hero__photo--5 { width: 135px; height: 90px; }

  /* Section 2 */
  .s2__form-card {
    padding: 30px 32px 36px;
  }
}

@media (max-width: 768px) {
  .hero {
    padding-bottom: 90px;
  }
  
  .hero__content {
    padding: 40px 16px 20px;
  }
  
  .hero__showcase {
    height: 420px;
    max-width: 100%;
  }
  
  .hero__teacher {
    width: 300px;
  }
  
  .hero__quote {
    margin-bottom: 24px;
  }
  
  .hero__photo--1 { width: 130px; height: 85px; top: -50px; left: -10px; }
  .hero__photo--2 { width: 110px; height: 72px; top: 20px; left: 15px; }
  .hero__photo--3 { width: 120px; height: 78px; top: -60px; right: -10px; }
  .hero__photo--4 { width: 115px; height: 75px; top: 5px; right: 15px; }
  .hero__photo--5 { width: 110px; height: 72px; top: 65px; right: 0; }
  
  .hero__banner-text {
    font-size: 0.78rem;
  }

  /* Section 2 */
  .s2__content {
    padding: 40px 16px 0;
  }
  .s2__form-card {
    padding: 28px 24px 32px;
  }
  .s2__form-desc {
    font-size: 0.82rem;
  }
  .s2__input {
    padding: 14px 16px;
    font-size: 0.9rem;
  }
  .s2__submit {
    padding: 16px 20px;
    font-size: 0.92rem;
  }
  .s2__image {
    margin-top: 36px;
  }

  /* Section 3 */
  .s3 { padding: 60px 0; }
  .s3__grid { grid-template-columns: repeat(2, 1fr); }
  .s3__quote { padding: 20px 24px; }

  /* Section 4 */
  .s4 { padding: 60px 0; }
  .s4__features { grid-template-columns: 1fr; }

  /* Section 5 */
  .s5 { padding: 60px 0; }
  .s5__pillars { grid-template-columns: 1fr; gap: 14px; }
  .cta-btn { padding: 16px 36px; font-size: 0.92rem; }

  /* Section 6 */
  .s6 { padding: 60px 0; }
  .s6__item { padding: 18px 20px; }
  .s6__num { font-size: 1.6rem; min-width: 48px; }

  /* Section 7 */
  .s7 { padding: 60px 0; }
  .s7__day { padding: 24px; }
  .s7__day-title { font-size: 0.95rem; }

  /* Section 8 */
  .s8 { padding: 60px 0; }
  .s8__grid { grid-template-columns: repeat(2, 1fr); }
  .s8__hub { padding: 28px 24px 22px; }

  /* Section 9 */
  .s9 { padding: 60px 0; }
  .s9__profile { grid-template-columns: 1fr; gap: 36px; padding: 32px; }
  .s9__photo-frame { width: 100%; max-width: 380px; height: 380px; }

  /* Section 10 */
  .s10 { padding: 60px 0; }
  .s10__container { grid-template-columns: 1fr; gap: 24px; }
  .s10__card--no { transform: scale(1); opacity: 1; }
  .s10__card--yes { transform: none; }

  /* Section 11 */
  .s11 { padding: 60px 0; }
  .s11__grid { grid-template-columns: 1fr; gap: 40px; }
  .s11__image-side { max-width: 500px; margin: 0 auto; }

  /* Section 12 */
  .s12 { padding: 60px 0; }
  .s12__steps { grid-template-columns: 1fr; max-width: 600px; margin-left: auto; margin-right: auto; }

  /* Section 13 */
  .s13 { padding: 60px 0; }
  .s13__card { width: 300px; }

  /* Section 14 */
  .s14 { padding: 60px 0; }
  .s14__frame { padding: 3px; border-radius: 16px; }
  .s14__video-wrapper { border-radius: 13px; }
  .s14__video-wrapper iframe { border-radius: 13px; }

  /* Section 15 */
  .s15 { padding: 60px 0; }

  /* Section 16 */
  .s16 { padding: 60px 0; }
  .s16__grid { grid-template-columns: 1fr; gap: 30px; }

  /* Footer */
  .footer__top { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 480px) {
  .hero__showcase {
    height: 350px;
  }
  
  .hero__teacher {
    width: 240px;
  }
  
  .hero__photo--1 { width: 100px; height: 65px; top: -30px; left: -5px; }
  .hero__photo--2 { width: 85px; height: 55px; top: 25px; left: 10px; }
  .hero__photo--3 { width: 95px; height: 62px; top: -35px; right: -5px; }
  .hero__photo--4 { width: 90px; height: 58px; top: 15px; right: 10px; }
  .hero__photo--5 { display: none; }
  
  .hero__photo {
    border-width: 2px;
    border-radius: 8px;
  }
  
  .hero__subtitle {
    letter-spacing: 0.08em;
  }

  /* Section 2 */
  .s2__content {
    padding: 32px 12px 0;
  }
  .s2__form-card {
    padding: 24px 18px 28px;
    border-radius: 14px;
  }
  .s2__form-desc {
    font-size: 0.78rem;
    margin-bottom: 14px;
  }
  .s2__form-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
  }
  .s2__input {
    padding: 13px 14px;
    font-size: 0.88rem;
    border-radius: 10px;
  }
  .s2__submit {
    padding: 15px 18px;
    font-size: 0.88rem;
    border-radius: 10px;
  }
  .s2__image {
    margin-top: 28px;
  }

  /* Section 3 */
  .s3 { padding: 48px 0; }
  .s3__grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .s3__card { padding: 20px 12px; }
  .s3__card-icon { font-size: 1.6rem; }
  .s3__quote { padding: 18px 18px; }
  .s3__quote p { font-size: 0.92rem; }

  /* Section 4 */
  .s4 { padding: 48px 0; }
  .s4__feature { padding: 18px; }
  .s4__feature-num { font-size: 1.2rem; min-width: 32px; }

  /* Section 5 */
  .s5 { padding: 48px 0; }
  .s5__pillar { padding: 24px 16px; }
  .cta-btn { padding: 14px 28px; font-size: 0.85rem; }

  /* Section 6 */
  .s6 { padding: 48px 0; }
  .s6__item { padding: 16px 14px; gap: 14px; }
  .s6__num { font-size: 1.3rem; min-width: 40px; }
  .s6__line { height: 24px; }
  .s6__text { font-size: 0.88rem; }

  /* Section 7 */
  .s7 { padding: 48px 0; }
  .s7__day { padding: 20px 18px; }
  .s7__day-header { flex-direction: column; align-items: flex-start; gap: 10px; }
  .s7__day-title { font-size: 0.9rem; }
  .s7__day-list li { font-size: 0.85rem; }

  /* Section 8 */
  .s8 { padding: 48px 0; }
  .s8__grid { grid-template-columns: 1fr; gap: 16px; }
  .s8__hub { padding: 24px 18px 20px; margin-bottom: 36px; }
  .s8__hub-icon { font-size: 2.2rem; }
  .s8__hub-title { font-size: 1.1rem; }
  .s8__hub-tagline { font-size: 0.78rem; gap: 6px; }
  .s8__dept { padding: 22px 18px 20px; }
  .s8__dept-head { gap: 8px; }

  /* Section 9 */
  .s9 { padding: 48px 0; }
  .s9__profile { padding: 24px 20px; gap: 28px; border-radius: 18px; }
  .s9__photo-frame { height: 320px; }
  .s9__name { font-size: 1.25rem; }
  .s9__credential { padding: 14px 12px; gap: 10px; }
  .s9__credential-icon { font-size: 1.15rem; }
  .s9__credential-text { font-size: 0.88rem; }

  /* Section 10 */
  .s10 { padding: 48px 0; }
  .s10__container { gap: 20px; }
  .s10__card { padding: 28px 20px; border-radius: 16px; }
  .s10__card-title { font-size: 1.25rem; margin-bottom: 20px; }
  .s10__list li { font-size: 0.88rem; }

  /* Section 11 */
  .s11 { padding: 48px 0; }
  .s11__grid { gap: 30px; padding: 20px; }
  .s11__list li { padding: 16px 14px; gap: 12px; }
  .s11__icon { width: 20px; height: 20px; }
  .s11__text { font-size: 0.9rem; }

  /* Section 12 */
  .s12 { padding: 48px 0; }
  .s12__step { padding: 30px 24px; }
  .s12__step-num { font-size: 5rem; right: 0; }

  /* Section 13 */
  .s13 { padding: 48px 0; }
  .s13__card { width: 260px; }
  .s13__track { gap: 16px; }

  /* Section 14 */
  .s14 { padding: 48px 0; }
  .s14__frame { padding: 3px; border-radius: 12px; }
  .s14__video-wrapper { border-radius: 9px; }
  .s14__video-wrapper iframe { border-radius: 9px; }

  /* Section 15 */
  .s15 { padding: 48px 0; }
  .s15__question { padding: 18px 18px; font-size: 0.95rem; gap: 12px; }
  .s15__answer { padding: 0 18px 18px 18px; }
  .s15__answer p { font-size: 0.88rem; }
  .s15__chevron { width: 18px; height: 18px; }

  /* Section 16 */
  .s16 { padding: 48px 0; }
  .s16__info { padding: 24px 20px; }
  .s16__info-title { font-size: 1.3rem; }
  .s16__price { font-size: 1.2rem; }
  .s16__form-card { padding: 24px 18px; }
  .s16__form-title { font-size: 1.4rem; }
  .s16__countdown-num { width: 42px; height: 42px; font-size: 1.1rem; }

  /* Footer */
  .footer { padding: 36px 0 20px; }
  .footer__disclaimer p { font-size: 0.6rem; }
}