/* ===== Variables ===== */
:root {
  --primary: #0b4d2c;
  --primary-dark: #083a20;
  --primary-light: #4d7c2c;
  --accent: #76b041;
  --accent-dark: #5f9634;
  --text: #1a2e22;
  --text-muted: #555555;
  --bg: #ffffff;
  --bg-light: #f4f9f0;
  --bg-card: #ffffff;
  --border: #d4e8c8;
  --shadow: 0 4px 24px rgba(11, 77, 44, 0.08);
  --shadow-lg: 0 12px 40px rgba(11, 77, 44, 0.12);
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Be Vietnam Pro', system-ui, -apple-system, sans-serif;
  --header-h: 72px;
  --mobile-bar-h: 64px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-light); }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 50px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  white-space: nowrap;
}
.btn--cta {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--cta:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(118, 176, 65, 0.4);
}
.btn--primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn--primary:hover {
  background: var(--primary-dark);
  color: #fff;
}
.btn--outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn--outline:hover {
  background: var(--primary);
  color: #fff;
}
.btn--lg { padding: 14px 32px; font-size: 1rem; }
.btn--sm { padding: 8px 20px; font-size: 0.875rem; }
.btn--full { width: 100%; }

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  flex-shrink: 0;
}
.logo__img {
  height: 52px;
  width: auto;
  max-width: 200px;
  display: block;
  object-fit: contain;
}
.logo__img--footer {
  background: rgba(255, 255, 255, 0.95);
  padding: 8px 14px;
  border-radius: 10px;
}

.nav__list {
  display: flex;
  gap: 8px;
}
.nav__link {
  padding: 8px 14px;
  color: var(--text);
  font-weight: 500;
  font-size: 0.9rem;
  border-radius: 8px;
  transition: all 0.2s;
}
.nav__link:hover {
  color: var(--primary);
  background: var(--bg-light);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all 0.3s;
  border-radius: 2px;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
  padding: var(--header-h) 0 0;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  display: none;
}
.hero img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.hero__inner {
  display: flex;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero__badge {
  display: inline-block;
  background: rgba(118, 176, 65, 0.15);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text);
}
.hero__highlight {
  color: var(--primary);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 520px;
}
.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero .btn--outline {
  color: var(--primary);
  border-color: var(--primary);
}
.hero .btn--outline:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.hero__stats {
  display: flex;
  gap: 32px;
}
.hero__stat strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}
.hero__stat span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.hero__visual {
  position: relative;
}
.hero__banner-img {
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  animation: heroFadeIn 0.8s ease-out;
}
@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Promo Banner ===== */
.promo-banner {
  margin-bottom: 40px;
}
.promo-banner--courses {
  margin-top: -8px;
}
.promo-banner__link {
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  line-height: 0;
}
.promo-banner__link:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(11, 77, 44, 0.18);
}
.promo-banner__link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}
.promo-banner__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}
.section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}
.section__tag {
  display: inline-block;
  background: var(--bg-light);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.section__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}
.section__desc {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ===== About ===== */
.about { background: var(--bg); }
.about__featured {
  width: 100%;
  margin: 0 auto 40px;
}
.about__image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: block;
}
.about__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.about__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  text-align: center;
  transition: all 0.3s ease;
}
.about__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.about__icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.about__card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.about__card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ===== Courses Duo Grid (2 gói nổi bật) ===== */
.courses-duo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 36px;
}

.course-duo-card {
  display: flex;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.course-duo-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(11, 77, 44, 0.16);
}

/* Variant: Primary (xanh lá đậm) */
.course-duo-card--primary {
  background: linear-gradient(135deg, #0b4d2c 0%, #1a7a47 60%, #4d7c2c 100%);
  color: #fff;
  box-shadow: 0 8px 32px rgba(11, 77, 44, 0.18);
}

/* Variant: Accent (vàng cam nổi bật) */
.course-duo-card--accent {
  background: linear-gradient(135deg, #b45309 0%, #d97706 55%, #f59e0b 100%);
  color: #fff;
  box-shadow: 0 8px 32px rgba(180, 83, 9, 0.22);
}

/* Layout bên trong */
.course-duo-card__left {
  flex: 1;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.course-duo-card__right {
  width: 180px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(4px);
}

/* Tag nhãn */
.course-duo-card__tag {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 50px;
  letter-spacing: 0.3px;
  width: fit-content;
}
.course-duo-card__tag--sale {
  background: rgba(239, 68, 68, 0.85);
  animation: pulseBadge 2s ease-in-out infinite;
}
@keyframes pulseBadge {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.4); }
  50% { box-shadow: 0 0 0 8px rgba(239,68,68,0); }
}

/* Tiêu đề & mô tả */
.course-duo-card__title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin: 0;
}
.course-duo-card__subtitle {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.5;
  margin: 0;
}

/* Meta list */
.course-duo-card__meta {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
}
.course-duo-card__meta li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.9);
}
.course-duo-card__meta li svg {
  flex-shrink: 0;
  color: rgba(255,255,255,0.75);
}
.course-duo-card__meta strong {
  color: #fff;
}

/* Price box */
.course-duo-card__price-box {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.course-duo-card__price-old {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  text-decoration: line-through;
}
.course-duo-card__price-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.course-duo-card__price-new {
  font-size: 1.75rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.course-duo-card__price-badge {
  background: #ef4444;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: 50px;
}

/* CTA */
.course-duo-card__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  background: rgba(255,255,255,0.18);
  border: 2px solid rgba(255,255,255,0.5);
  color: #fff;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.3s ease;
  width: fit-content;
  margin-top: auto;
  backdrop-filter: blur(4px);
}
.course-duo-card__cta:hover {
  background: rgba(255,255,255,0.32);
  border-color: #fff;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}
.course-duo-card__cta svg {
  transition: transform 0.3s ease;
}
.course-duo-card__cta:hover svg {
  transform: translateX(4px);
}
.course-duo-card__cta--sale {
  background: rgba(255,255,255,0.95);
  border-color: transparent;
  color: #b45309;
}
.course-duo-card__cta--sale:hover {
  background: #fff;
  color: #92400e;
  border-color: #fff;
}

/* Icon & stats bên phải */
.course-duo-card__icon-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}
.course-duo-card__big-icon {
  font-size: 3rem;
  line-height: 1;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.2));
}
.course-duo-card__highlights {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}
.course-duo-card__hl-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255,255,255,0.12);
  border-radius: 10px;
  padding: 8px 12px;
  text-align: center;
}
.course-duo-card__hl-num {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
}
.course-duo-card__hl-label {
  font-size: 0.68rem;
  color: rgba(255,255,255,0.75);
  font-weight: 500;
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

/* ===== Courses V2 ===== */
.courses-section {
  margin-top: 48px;
  margin-bottom: 48px;
}
.courses-section__header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}
.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

/* Card V2 */
.course-card-v2 {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  display: flex;
  flex-direction: column;
}
.course-card-v2:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 60px rgba(11, 77, 44, 0.15), 0 8px 24px rgba(11, 77, 44, 0.08);
  border-color: transparent;
}

/* Featured card */
.course-card-v2--featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow);
}
.course-card-v2--featured::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: linear-gradient(135deg, var(--accent), var(--primary), var(--accent));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 1;
}
.course-card-v2--featured:hover {
  box-shadow: 0 20px 60px rgba(118, 176, 65, 0.2), 0 0 0 1px var(--accent);
}

/* Image area */
.course-card-v2__img-wrap {
  position: relative;
  height: 220px;
  overflow: hidden;
}
.course-card-v2__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.course-card-v2:hover .course-card-v2__img-wrap img {
  transform: scale(1.08);
}
.course-card-v2__img-wrap::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60%;
  background: linear-gradient(to top, rgba(0,0,0,0.35), transparent);
  pointer-events: none;
}

/* Badge */
.course-card-v2__badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 14px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  letter-spacing: 0.3px;
}
.course-card-v2__badge--hot {
  background: rgba(239, 68, 68, 0.9);
  color: #fff;
}
.course-card-v2__badge--popular {
  background: rgba(245, 158, 11, 0.92);
  color: #fff;
}
.course-card-v2__badge--new {
  background: rgba(59, 130, 246, 0.9);
  color: #fff;
}

/* Card body */
.course-card-v2__body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.course-card-v2__title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text);
  line-height: 1.3;
}
.course-card-v2__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 18px;
}

/* Features list */
.course-card-v2__features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  list-style: none;
}
.course-card-v2__features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.course-card-v2__features li svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* CTA button */
.course-card-v2__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  text-decoration: none;
  margin-top: auto;
  text-align: center;
}
.course-card-v2__cta:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 77, 44, 0.3);
}
.course-card-v2__cta svg {
  transition: transform 0.3s ease;
}
.course-card-v2__cta:hover svg {
  transform: translateX(4px);
}

.course-card-v2__cta--disabled,
.course-card-v2__cta--disabled:hover {
  background: #f1f5f9 !important;
  color: #94a3b8 !important;
  cursor: default !important;
  transform: none !important;
  box-shadow: none !important;
}


/* ===== Roadmap ===== */
.roadmap__visual {
  width: 100%;
}
.roadmap__img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.roadmap__timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  counter-reset: step;
}
.roadmap__timeline::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 12%;
  right: 12%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  border-radius: 2px;
}
.roadmap__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0 12px;
  position: relative;
}
.roadmap__number {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(11, 77, 44, 0.25);
  position: relative;
  z-index: 1;
}
.roadmap__content h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.roadmap__content p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== Feedback ===== */
.feedback { background: var(--bg-light); }
.feedback__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feedback-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
}
.feedback-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.feedback-card__stars {
  color: #fbbf24;
  font-size: 1rem;
  margin-bottom: 12px;
}
.feedback-card__quote {
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 20px;
  font-style: italic;
}
.feedback-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.feedback-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  flex-shrink: 0;
  object-fit: cover;
}
.feedback-card__author strong {
  display: block;
  font-size: 0.9rem;
}
.feedback-card__author span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== FAQ V2 ===== */
.faq-v2 {
  margin-top: 56px;
}
.faq-v2__layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 48px;
  align-items: start;
}

/* Header / Left side */
.faq-v2__header {
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.faq-v2__icon-wrap {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(11, 77, 44, 0.2);
}
.faq-v2__title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 14px;
}
.faq-v2__subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 28px;
}
.faq-v2__contact p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.faq-v2__hotline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  text-decoration: none;
}
.faq-v2__hotline:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11, 77, 44, 0.2);
}

/* Accordion list */
.faq-v2__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-v2__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-v2__item:hover {
  border-color: rgba(118, 176, 65, 0.3);
  box-shadow: 0 4px 16px rgba(11, 77, 44, 0.06);
}
.faq-v2__item[open] {
  border-color: var(--accent);
  box-shadow: 0 8px 32px rgba(11, 77, 44, 0.1);
  border-left: 3px solid var(--accent);
}

/* Question / Summary */
.faq-v2__question {
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: all 0.2s;
  user-select: none;
}
.faq-v2__question::-webkit-details-marker { display: none; }
.faq-v2__question::marker { display: none; content: ''; }

.faq-v2__q-num {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent);
  background: rgba(118, 176, 65, 0.1);
  padding: 4px 8px;
  border-radius: 6px;
  flex-shrink: 0;
  min-width: 32px;
  text-align: center;
}
.faq-v2__item[open] .faq-v2__q-num {
  background: var(--accent);
  color: #fff;
}

.faq-v2__q-text {
  flex: 1;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.4;
}
.faq-v2__item[open] .faq-v2__q-text {
  color: var(--primary);
}

.faq-v2__chevron {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-light);
  color: var(--text-muted);
  transition: all 0.3s ease;
}
.faq-v2__item[open] .faq-v2__chevron {
  transform: rotate(180deg);
  background: rgba(118, 176, 65, 0.1);
  color: var(--accent);
}

/* Answer */
.faq-v2__answer {
  padding: 0 24px 20px 60px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
  animation: faqSlideIn 0.3s ease;
}
.faq-v2__answer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.faq-v2__answer a:hover {
  color: var(--accent);
}
@keyframes faqSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Contact ===== */
.contact { background: var(--bg-light); }
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}

/* --- Contact Info Card --- */
.contact__info {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s ease;
}
.contact__info:hover {
  box-shadow: var(--shadow-lg);
}

/* Info Header */
.contact__info-header {
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.contact__info-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(118, 176, 65, 0.1);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  margin-bottom: 14px;
}
.contact__info-badge svg {
  flex-shrink: 0;
}
.contact__info-title {
  font-size: clamp(1.4rem, 2.5vw, 1.75rem);
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--text);
}
.contact__desc {
  color: var(--text-muted);
  margin-bottom: 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Contact Detail Items */
.contact__details {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.contact__detail-item {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border-radius: var(--radius);
  transition: all 0.3s ease;
  cursor: default;
}
.contact__detail-item:hover {
  background: var(--bg-light);
  transform: translateX(4px);
}
.contact__detail-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.contact__detail-item:hover .contact__detail-icon {
  transform: scale(1.08);
}
.contact__detail-icon--location {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}
.contact__detail-icon--phone {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
}
.contact__detail-icon--email {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}
.contact__detail-icon--clock {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}
.contact__detail-text strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 2px;
  color: var(--text);
}
.contact__detail-text p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.4;
}
.contact__detail-text a {
  color: var(--primary);
  font-weight: 500;
  transition: color 0.2s;
}
.contact__detail-text a:hover {
  color: var(--accent);
}

/* Map */
.contact__map {
  margin: 20px 0;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.contact__map img,
.contact__map iframe {
  width: 100%;
  display: block;
}
.contact__map img {
  height: auto;
}
.contact__map iframe {
  height: 220px;
  border: 0;
}

/* Social Buttons */
.contact__social {
  display: flex;
  gap: 12px;
  margin-top: 8px;
}
.contact__social-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.875rem;
  color: #fff;
  transition: all 0.3s ease;
  text-decoration: none;
}
.contact__social-btn:hover {
  transform: translateY(-3px);
  color: #fff;
}
.contact__social-btn--fb {
  background: linear-gradient(135deg, #1877f2, #0d5cc7);
  box-shadow: 0 4px 16px rgba(24, 119, 242, 0.3);
}
.contact__social-btn--fb:hover {
  box-shadow: 0 8px 24px rgba(24, 119, 242, 0.45);
}
.contact__social-btn--zalo {
  background: linear-gradient(135deg, #0068ff, #004dc7);
  box-shadow: 0 4px 16px rgba(0, 104, 255, 0.3);
}
.contact__social-btn--zalo:hover {
  box-shadow: 0 8px 24px rgba(0, 104, 255, 0.45);
}
.contact__social-zalo-icon {
  font-weight: 900;
  font-size: 1rem;
  line-height: 1;
}

/* --- Registration Form Card --- */
.contact__form-wrap {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(11, 77, 44, 0.12);
  border: 1px solid var(--border);
  position: relative;
}
.contact__form-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary-light));
  background-size: 200% 100%;
  animation: contactGradientFlow 4s ease infinite;
}
@keyframes contactGradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* Form Header */
.contact__form-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 28px 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
}
.contact__form-header-icon {
  width: 52px;
  height: 52px;
  background: rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  backdrop-filter: blur(4px);
}
.contact__form-header-icon svg {
  color: #fff;
}
.contact__form-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 2px;
  color: #fff;
}
.contact__form-subtitle {
  font-size: 0.85rem;
  opacity: 0.85;
  font-weight: 400;
}

/* Form Fields */
.contact__form-wrap .contact__form {
  padding: 28px 32px 32px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 8px;
  color: var(--text);
}
.form-group label svg {
  color: var(--primary);
  flex-shrink: 0;
}
.required { color: var(--accent); }
.form-group input,
.form-group select {
  width: 100%;
  padding: 13px 18px;
  border: 2px solid var(--border);
  border-radius: 12px;
  font-family: var(--font);
  font-size: 0.95rem;
  transition: all 0.3s ease;
  background: var(--bg-light);
  color: var(--text);
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(118, 176, 65, 0.15);
  background: var(--bg);
}
.form-group input:hover,
.form-group select:hover {
  border-color: rgba(118, 176, 65, 0.4);
}
.form-group input.error,
.form-group select.error {
  border-color: #ef4444;
}
.form-group input::placeholder {
  color: #a0aec0;
}

/* Submit Button */
.contact__submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 15px 28px;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  color: #fff;
  border: none;
  border-radius: 12px;
  font-family: var(--font);
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.35s ease;
  box-shadow: 0 4px 16px rgba(118, 176, 65, 0.3);
  position: relative;
  overflow: hidden;
}
.contact__submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.5s ease;
}
.contact__submit-btn:hover::before {
  left: 100%;
}
.contact__submit-btn:hover {
  background: linear-gradient(135deg, var(--accent-dark), var(--primary));
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(118, 176, 65, 0.4);
}
.contact__submit-btn:active {
  transform: translateY(0);
}
.contact__submit-btn svg {
  transition: transform 0.3s ease;
}
.contact__submit-btn:hover svg {
  transform: translateX(3px) translateY(-2px);
}

/* Trust Indicators */
.contact__form-trust {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.contact__trust-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}
.contact__trust-item svg {
  color: var(--accent);
  flex-shrink: 0;
}

/* Form Success */
.form-success {
  text-align: center;
  padding: 48px 24px;
}
.form-success__icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: rgba(118, 176, 65, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  animation: successPulse 2s ease-in-out infinite;
}
@keyframes successPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(118, 176, 65, 0.2); }
  50% { box-shadow: 0 0 0 12px rgba(118, 176, 65, 0); }
}
.form-success h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--primary);
}
.form-success p {
  color: var(--text-muted);
  font-size: 0.95rem;
}
.form-note {
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 12px;
}


/* ===== Footer ===== */
.footer {
  background: var(--primary-dark);
  color: #cbd5e1;
  padding: 0;
}
.footer__cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 28px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer__cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.footer__cta-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer__cta-text strong {
  color: #fff;
  font-size: 1.15rem;
}
.footer__cta-text span {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding: 48px 20px 40px;
}
.footer .logo__img--footer {
  margin-bottom: 4px;
}
.footer__desc {
  margin-top: 12px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: #94a3b8;
}
.footer__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 20px;
}
.footer__stats li {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 10px 8px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.footer__stats strong {
  display: block;
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 800;
  line-height: 1.2;
}
.footer__stats span {
  font-size: 0.7rem;
  color: #94a3b8;
}
.footer__social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.footer__social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: all 0.25s ease;
}
.footer__social-link span {
  font-weight: 800;
  font-size: 0.95rem;
}
.footer__social-link:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}
.footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
}
.footer__nav ul li { margin-bottom: 10px; }
.footer__nav a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: color 0.2s, padding-left 0.2s;
  display: inline-block;
}
.footer__nav a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer__contact-list {
  list-style: none;
}
.footer__contact-list li {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: flex-start;
}
.footer__contact-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(118, 176, 65, 0.15);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.footer__contact-label {
  display: block;
  font-size: 0.75rem;
  color: #64748b;
  margin-bottom: 2px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}
.footer__contact-list a,
.footer__contact-list span {
  font-size: 0.9rem;
  color: #cbd5e1;
  line-height: 1.4;
}
.footer__contact-list a:hover { color: #fff; }
.footer__hotline-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
  padding: 12px 16px;
  background: var(--accent);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.25s ease;
}
.footer__hotline-btn:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(118, 176, 65, 0.35);
}
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__copyright {
  font-size: 0.85rem;
  color: #94a3b8;
}
.footer__legal {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer__legal a {
  font-size: 0.85rem;
  color: #94a3b8;
  transition: color 0.2s;
}
.footer__legal a:hover { color: #fff; }

/* ===== Floating Contact (Desktop) ===== */
.float-contact {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 900;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.float-contact__item {
  position: relative;
  width: 52px;
  height: 52px;
}
.float-contact__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  pointer-events: none;
  animation: contact-pulse 2.4s ease-out infinite;
}
.float-contact__ring--delay {
  animation-delay: 1.2s;
}
.float-contact__item:nth-child(1) .float-contact__ring {
  box-shadow: 0 0 0 0 rgba(34, 197, 94, 0.55);
  border: 2px solid rgba(34, 197, 94, 0.45);
}
.float-contact__item:nth-child(2) .float-contact__ring {
  box-shadow: 0 0 0 0 rgba(0, 104, 255, 0.55);
  border: 2px solid rgba(0, 104, 255, 0.45);
}
.float-contact__item:nth-child(3) .float-contact__ring {
  box-shadow: 0 0 0 0 rgba(0, 132, 255, 0.55);
  border: 2px solid rgba(0, 132, 255, 0.45);
}
.float-contact__item:nth-child(4) .float-contact__ring {
  box-shadow: 0 0 0 0 rgba(118, 176, 65, 0.55);
  border: 2px solid rgba(118, 176, 65, 0.45);
}
@keyframes contact-pulse {
  0% {
    transform: scale(1);
    opacity: 0.75;
  }
  70% {
    transform: scale(1.65);
    opacity: 0;
  }
  100% {
    transform: scale(1.65);
    opacity: 0;
  }
}
.float-contact__btn {
  position: relative;
  z-index: 1;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  font-weight: 800;
  font-size: 1.1rem;
  animation: contact-float 3s ease-in-out infinite;
}
.float-contact__item:nth-child(1) .float-contact__btn { animation-delay: 0s; }
.float-contact__item:nth-child(2) .float-contact__btn { animation-delay: 0.4s; }
.float-contact__item:nth-child(3) .float-contact__btn { animation-delay: 0.8s; }
.float-contact__item:nth-child(4) .float-contact__btn { animation-delay: 1.2s; }
@keyframes contact-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
.float-contact__btn:hover {
  transform: scale(1.12) translateY(-2px);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  animation: none;
}
.float-contact__btn--phone { background: #22c55e; }
.float-contact__btn--zalo { background: #0068ff; }
.float-contact__btn--messenger { background: #0084ff; }
.float-contact__btn--email { background: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  .float-contact__ring,
  .float-contact__btn {
    animation: none;
  }
}

/* ===== Mobile Bar ===== */
.mobile-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: #fff;
  border-top: 1px solid var(--border);
  height: var(--mobile-bar-h);
  box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}
.mobile-bar__btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: color 0.2s;
  text-decoration: none;
}
.mobile-bar__btn span:last-child { font-size: 0.65rem; }
.mobile-bar__btn--phone { color: #22c55e; }
.mobile-bar__btn--zalo { color: #0068ff; }
.mobile-bar__btn--messenger { color: #0084ff; }
.mobile-bar__btn--cta {
  background: var(--accent);
  color: #fff;
  border-radius: 0;
}
.mobile-bar__btn--cta:hover { color: #fff; }

/* ===== Register Popup ===== */
.popup {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s ease, visibility 0.45s ease;
}
.popup.popup--visible {
  opacity: 1;
  visibility: visible;
}
.popup__overlay {
  position: absolute;
  inset: 0;
  background: rgba(8, 58, 32, 0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: popupOverlayIn 0.5s ease forwards;
}
.popup:not(.popup--visible) .popup__overlay {
  animation: none;
}
@keyframes popupOverlayIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.popup__dialog {
  position: relative;
  width: 100%;
  max-width: 480px;
  max-height: 92vh;
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(8, 58, 32, 0.35);
  overflow: hidden;
  transform: scale(0.88) translateY(40px);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.34, 1.4, 0.64, 1), opacity 0.45s ease;
}
.popup.popup--visible .popup__dialog {
  transform: scale(1) translateY(0);
  opacity: 1;
}
.popup__close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 10;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transition: transform 0.25s ease, background 0.25s ease;
}
.popup__close:hover {
  transform: rotate(90deg) scale(1.08);
  background: #fff;
  color: var(--primary);
}
.popup__inner {
  display: flex;
  flex-direction: column;
  max-height: 92vh;
}
.popup__banner {
  position: relative;
  background: var(--bg-light);
  overflow: hidden;
  width: 100%;
  height: auto;
  flex-shrink: 0;
}
.popup__banner-img {
  width: 100%;
  height: auto;
  display: block;
  animation: popupBannerZoom 0.8s ease forwards;
}
@keyframes popupBannerZoom {
  from { transform: scale(1.08); }
  to { transform: scale(1); }
}
.popup__sale-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: 50px;
  box-shadow: 0 4px 16px rgba(118, 176, 65, 0.5);
  animation: popupBadgePulse 2s ease-in-out infinite;
}
@keyframes popupBadgePulse {
  0%, 100% { transform: scale(1); box-shadow: 0 4px 16px rgba(118, 176, 65, 0.5); }
  50% { transform: scale(1.06); box-shadow: 0 6px 24px rgba(118, 176, 65, 0.7); }
}
.popup__content {
  padding: 24px 24px 20px;
  overflow-y: auto;
  max-height: 92vh;
}
.popup__tag {
  display: inline-block;
  background: rgba(118, 176, 65, 0.15);
  color: var(--primary-light);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  animation: popupSlideIn 0.6s ease 0.15s both;
}
.popup__title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
  line-height: 1.3;
  animation: popupSlideIn 0.6s ease 0.2s both;
}
.popup__subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  animation: popupSlideIn 0.6s ease 0.25s both;
}
.popup__subtitle strong {
  color: var(--accent-dark);
  font-size: 1.05rem;
}
.popup__subtitle s {
  opacity: 0.6;
}
@keyframes popupSlideIn {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}
.popup__form .form-group {
  animation: popupSlideIn 0.5s ease both;
}
.popup__form .form-group:nth-child(1) { animation-delay: 0.3s; }
.popup__form .form-group:nth-child(2) { animation-delay: 0.35s; }
.popup__form .form-group:nth-child(3) { animation-delay: 0.4s; }
.popup__form .form-group:nth-child(4) { animation-delay: 0.45s; }
.popup__form .form-group:nth-child(5) { animation-delay: 0.5s; }
.popup__form label {
  font-size: 0.8rem;
  margin-bottom: 4px;
}
.popup__form input,
.popup__form select {
  padding: 10px 14px;
  font-size: 0.875rem;
}
.popup__submit {
  margin-top: 4px;
  animation: popupSlideIn 0.5s ease 0.55s both;
  gap: 8px;
}
.popup__submit svg {
  transition: transform 0.25s ease;
}
.popup__submit:hover svg {
  transform: translateX(4px);
}
.popup__success {
  text-align: center;
  padding: 32px 16px;
  animation: popupSlideIn 0.5s ease both;
}
.popup__success-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 16px;
  background: rgba(118, 176, 65, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  animation: popupSuccessPop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
@keyframes popupSuccessPop {
  from { transform: scale(0); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.popup__success h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--primary);
}
.popup__success p {
  color: var(--text-muted);
  margin-bottom: 20px;
  font-size: 0.9rem;
}
body.popup-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .popup__dialog,
  .popup__banner-img,
  .popup__sale-badge,
  .popup__form .form-group,
  .popup__tag,
  .popup__title,
  .popup__subtitle,
  .popup__submit {
    animation: none;
    transition: none;
  }
}

/* ===== Scroll reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ===== Section 2: Pain points ===== */
.pain { background: var(--bg); }
.pain__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.pain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid #ef8c5a;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  transition: all 0.3s ease;
}
.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.pain-card__icon {
  font-size: 2.25rem;
  margin-bottom: 14px;
}
.pain-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.pain-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.55;
}
.pain__transition {
  text-align: center;
  margin-top: 40px;
  font-size: 1.15rem;
  color: var(--text);
}
.pain__transition strong { color: var(--primary); }

/* ===== Section 3: Solution roadmap ===== */
.solution { background: var(--bg-light); }
.solution__roadmap {
  margin-top: 56px;
}
.solution__roadmap-title {
  text-align: center;
  font-size: clamp(1.25rem, 2.4vw, 1.6rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 28px;
}

/* ===== Section 4: Why choose us + Social proof ===== */
.why { background: var(--bg); }
.why__layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 40px;
  align-items: center;
  margin-bottom: 48px;
}
.why__featured .about__image { margin: 0; }
.why__grid {
  grid-template-columns: 1fr;
  gap: 18px;
}
.why__grid .about__card {
  text-align: left;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 18px;
  padding: 22px 24px;
  align-items: center;
}
.why__grid .about__icon {
  grid-row: span 2;
  margin-bottom: 0;
  font-size: 2.25rem;
}
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  box-shadow: var(--shadow-lg);
}
.stats-bar li {
  text-align: center;
  color: #fff;
}
.stats-bar strong {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
}
.stats-bar span {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.85);
}

/* ===== Section 6: Commitment V2 ===== */
.commit { background: var(--bg-light); }

/* Trust banner */
.commit-v2__banner {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  margin-bottom: 36px;
  color: #fff;
  box-shadow: 0 8px 32px rgba(11, 77, 44, 0.2);
}
.commit-v2__banner-icon {
  width: 64px;
  height: 64px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  backdrop-filter: blur(4px);
}
.commit-v2__banner-icon svg {
  color: #fff;
}
.commit-v2__banner-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.commit-v2__banner-text strong {
  font-size: 1.15rem;
  font-weight: 800;
}
.commit-v2__banner-text span {
  font-size: 0.9rem;
  opacity: 0.85;
}

/* Grid */
.commit-v2__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

/* Card */
.commit-v2__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 28px 24px;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
}
.commit-v2__card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(11, 77, 44, 0.12);
  border-color: transparent;
}
.commit-v2__card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

/* Icon circle */
.commit-v2__icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.commit-v2__card:hover .commit-v2__icon {
  transform: scale(1.08) rotate(-3deg);
}
.commit-v2__icon--gift {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}
.commit-v2__icon--money {
  background: rgba(245, 158, 11, 0.1);
  color: #f59e0b;
}
.commit-v2__icon--quality {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}
.commit-v2__icon--lock {
  background: rgba(118, 176, 65, 0.1);
  color: var(--accent);
}
.commit-v2__card:hover .commit-v2__icon--gift { background: rgba(239, 68, 68, 0.15); }
.commit-v2__card:hover .commit-v2__icon--money { background: rgba(245, 158, 11, 0.15); }
.commit-v2__card:hover .commit-v2__icon--quality { background: rgba(59, 130, 246, 0.15); }
.commit-v2__card:hover .commit-v2__icon--lock { background: rgba(118, 176, 65, 0.15); }

/* Number */
.commit-v2__number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--border);
  line-height: 1;
  letter-spacing: -1px;
  transition: color 0.3s ease;
}
.commit-v2__card:hover .commit-v2__number {
  color: var(--accent);
}

/* Text */
.commit-v2__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.commit-v2__desc {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Hover border accent */
.commit-v2__card:nth-child(1):hover { border-color: rgba(239, 68, 68, 0.3); }
.commit-v2__card:nth-child(2):hover { border-color: rgba(245, 158, 11, 0.3); }
.commit-v2__card:nth-child(3):hover { border-color: rgba(59, 130, 246, 0.3); }
.commit-v2__card:nth-child(4):hover { border-color: rgba(118, 176, 65, 0.3); }

/* CTA */
.commit-v2__cta-wrap {
  text-align: center;
  margin-bottom: 8px;
}
.commit-v2__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--accent), var(--primary-light));
  color: #fff;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.3s ease;
  text-decoration: none;
  box-shadow: 0 4px 20px rgba(118, 176, 65, 0.3);
}
.commit-v2__cta:hover {
  background: linear-gradient(135deg, var(--accent-dark), var(--primary));
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(118, 176, 65, 0.4);
}
.commit-v2__cta-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
}


/* ===== Section 7: CTA banner + contact ===== */
.promo-banner--cta {
  margin-bottom: 40px;
}

/* ===== Responsive: Tablet ===== */
@media (max-width: 1024px) {
  .hero {
    padding: var(--header-h) 0 0;
  }
  .hero::before {
    display: none;
  }
  .hero__inner {
    justify-content: center;
    text-align: center;
  }
  .hero__desc { margin: 0 auto 28px; }
  .hero__actions { justify-content: center; }
  .hero__stats { justify-content: center; }

  .about__grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .pain__grid { grid-template-columns: repeat(2, 1fr); }
  .commit-v2__grid { gap: 20px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 28px 20px; }
  .why__layout {
    grid-template-columns: 1fr;
    gap: 28px;
    max-width: 600px;
    margin: 0 auto 40px;
  }
  .why__grid { max-width: none; }
  .courses-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .courses-duo-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .course-duo-card__right { width: 150px; }
  .roadmap__timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .roadmap__timeline::before { display: none; }
  .feedback__grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .faq-v2__layout { grid-template-columns: 1fr; gap: 32px; }
  .faq-v2__header { position: static; text-align: center; }
  .faq-v2__icon-wrap { margin: 0 auto 20px; }
  .contact__grid { grid-template-columns: 1fr; gap: 28px; }
  .contact__info { padding: 28px 24px; }
  .contact__form-trust { gap: 14px; flex-wrap: wrap; }
  .popup__inner {
    display: flex;
    flex-direction: column;
    max-height: 90vh;
  }
  .popup__content {
    flex: 1;
    overflow-y: auto;
  }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__stats { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Responsive: Mobile (Mẫu 4) ===== */
@media (max-width: 768px) {
  :root { --header-h: 60px; }

  .logo__img {
    height: 44px;
    max-width: 160px;
  }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 16px;
    transform: translateY(-120%);
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
  }
  .nav.open {
    transform: translateY(0);
    opacity: 1;
  }
  .nav__list {
    flex-direction: column;
    gap: 4px;
  }
  .nav__link {
    display: block;
    padding: 12px 16px;
    font-size: 1rem;
  }
  .header__cta { display: none; }
  .hamburger { display: flex; }

  .hero { padding-bottom: 0; }
  .hero__stats { gap: 20px; }
  .hero__stat strong { font-size: 1.4rem; }

  .section { padding: 56px 0; }

  .pain__grid { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
  .commit-v2__grid { grid-template-columns: 1fr; }
  .commit-v2__banner { flex-direction: column; text-align: center; padding: 20px; }
  .commit-v2__banner-icon { width: 52px; height: 52px; }
  .commit-v2__banner-icon svg { width: 28px; height: 28px; }
  .pain__transition { font-size: 1.05rem; }
  .why__grid .about__card { grid-template-columns: 1fr; text-align: center; }
  .why__grid .about__icon { grid-row: auto; margin-bottom: 8px; }

  /* Course cards stack on mobile */
  .courses-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .courses-duo-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .course-duo-card__right { display: none; }
  .course-duo-card__left { padding: 24px 20px; }
  .courses-section {
    margin-top: 32px;
    margin-bottom: 32px;
  }
  .course-card-v2__img-wrap {
    height: 200px;
  }

  /* Vertical timeline on mobile */
  .roadmap__timeline {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
    gap: 0;
  }
  .roadmap__step {
    flex-direction: row;
    text-align: left;
    gap: 20px;
    padding: 0 0 32px;
    align-items: flex-start;
  }
  .roadmap__step:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 27px;
    top: 56px;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--primary-light));
  }
  .roadmap__number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    font-size: 1.1rem;
    margin-bottom: 0;
  }

  .contact__info { padding: 24px 20px; }
  .contact__info-header { margin-bottom: 20px; padding-bottom: 18px; }
  .contact__detail-item { padding: 10px 12px; }
  .contact__detail-icon { width: 40px; height: 40px; }
  .contact__social { flex-direction: column; }
  .contact__social-btn { justify-content: center; }
  .contact__form-header { padding: 20px; gap: 12px; }
  .contact__form-header-icon { width: 44px; height: 44px; }
  .contact__form-wrap .contact__form { padding: 20px; }
  .contact__form-title { font-size: 1.1rem; }
  .contact__form-trust { gap: 8px; flex-direction: column; align-items: center; }

  .float-contact { display: none; }
  .mobile-bar {
    display: flex;
  }

  body { padding-bottom: var(--mobile-bar-h); }

  .footer__inner { grid-template-columns: 1fr; gap: 28px; }
  .footer__cta-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer__cta-inner .btn { width: 100%; }
  .footer__stats { grid-template-columns: repeat(4, 1fr); }
  .footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer__legal {
    justify-content: center;
    gap: 12px 16px;
  }

  .popup__title { font-size: 1.15rem; }

  /* Popup mobile: gọn, chỉ placeholder */
  .popup { padding: 16px; align-items: center; }
  .popup__dialog {
    max-height: 88vh;
    border-radius: 16px;
  }
  .popup__inner {
    max-height: 88vh;
  }
  .popup__header { display: none; }
  .popup__banner { max-height: 200px; }
  .popup__sale-badge {
    top: 8px;
    left: 8px;
    font-size: 0.75rem;
    padding: 4px 10px;
  }
  .popup__content {
    padding: 16px 16px 20px;
  }
  .popup__form .popup__label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
  }
  .popup__form .form-group {
    margin-bottom: 8px;
  }
  .popup__form .form-group--optional-mobile {
    display: none;
  }
  .popup__form input,
  .popup__form select {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  .popup__form .form-note {
    display: none;
  }
  .popup__submit {
    padding: 12px 20px;
    font-size: 0.95rem;
    margin-top: 4px;
  }
  .popup__close {
    top: 8px;
    right: 8px;
    width: 34px;
    height: 34px;
  }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .hero__stats { flex-wrap: wrap; gap: 16px; }
  .footer__stats { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Button Loading & Form Error States ===== */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.spinner {
  animation: spin 0.8s linear infinite;
  display: none;
  flex-shrink: 0;
}

.btn--loading {
  pointer-events: none;
  opacity: 0.8;
  cursor: not-allowed;
}

.btn--loading .spinner {
  display: inline-block;
}

.btn--loading svg:not(.spinner) {
  display: none;
}

.form-error-msg {
  display: none;
  margin-top: 14px;
  padding: 10px 14px;
  background-color: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ea3838;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  text-align: center;
  animation: formErrorFadeIn 0.3s ease;
}

@keyframes formErrorFadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}