/* ==============================================================================
   Lychee Chinese - HSK1 79k Acquisition Landing Page Stylesheet
   Campaign: HSK1_79K_2026
   Slug: lychee-hsk1-79k-lead
   Domain: hsk1-79k.tiengtrunglychee.vn
   ============================================================================== */

:root {
  --primary: #9f1239; /* Lychee Wine / Deep Crimson */
  --primary-hover: #881337;
  --primary-light: #fff1f2;
  --primary-border: #fecdd3;
  --accent: #e11d48; /* Vibrant Lychee Red */
  --accent-soft: #ffe4e6;
  --accent-glow: rgba(225, 29, 72, 0.25);
  
  --bg-page: #fcf9f5; /* Warm Oriental Cream */
  --bg-surface: #ffffff;
  --bg-surface-subtle: #f8f5f0;
  --bg-card-glass: rgba(255, 255, 255, 0.94);
  
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --border-color: #e2e8f0;
  --border-highlight: #cbd5e1;
  
  --emerald: #059669;
  --emerald-bg: #ecfdf5;
  --emerald-border: #a7f3d0;
  
  --amber: #d97706;
  --amber-bg: #fffbeb;
  --amber-border: #fde68a;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(159, 18, 57, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Container */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Top Announcement Banner */
/* Top Utility Contact Bar */
.utility-contact-bar {
  background: #0f172a;
  color: #94a3b8;
  font-size: 0.82rem;
  padding: 8px 0;
  border-bottom: 1px solid #1e293b;
}

.utility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.utility-left {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.utility-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.2s;
}

.utility-item:hover {
  color: #ffffff;
}

.utility-item strong {
  color: #ffffff;
}

.utility-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.utility-social {
  color: #94a3b8;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.8rem;
  transition: color 0.2s;
}

.utility-social:hover {
  color: var(--accent);
}

/* Header */
.site-header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 10px 0;
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-badge-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(159, 18, 57, 0.25);
  border: 1.5px solid rgba(225, 29, 72, 0.2);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.88rem;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  text-decoration: none;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(159, 18, 57, 0.2);
}

.header-cta-btn:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(159, 18, 57, 0.3);
}

/* Hero Section */
.hero-section {
  padding: 56px 0 44px;
  position: relative;
  background: radial-gradient(circle at 50% 10%, #fff1f2 0%, var(--bg-page) 70%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
}

.hero-left {
  text-align: left;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--primary-border);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.hero-pill-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(1.85rem, 3.8vw, 2.5rem);
  font-weight: 900;
  color: var(--text-main);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-title .highlight {
  color: var(--primary);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: #334155;
  font-weight: 600;
  margin-bottom: 16px;
  line-height: 1.45;
}

.hero-desc {
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
  max-width: 620px;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.btn-primary-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 16px 36px;
  border-radius: var(--radius-full);
  text-decoration: none;
  box-shadow: var(--shadow-xl);
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn-primary-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(159, 18, 57, 0.35);
}

.hero-trust-note {
  font-size: 0.84rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Hero Right Visual */
.hero-right {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrapper {
  position: relative;
  max-width: 480px;
  width: 100%;
}

.hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(159, 18, 57, 0.12), 0 1px 3px rgba(0,0,0,0.08);
  border: 4px solid #ffffff;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.hero-floating-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(225, 29, 72, 0.15);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float-badge 3s ease-in-out infinite;
}

.floating-card-top {
  top: -12px;
  right: -16px;
  animation-delay: 0s;
}

.floating-card-bottom {
  bottom: -16px;
  left: -16px;
  animation-delay: 1.5s;
}

@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.floating-icon {
  font-size: 1.3rem;
  background: var(--primary-light);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.floating-text {
  display: flex;
  flex-direction: column;
}

.floating-text strong {
  font-size: 0.82rem;
  color: var(--text-main);
  font-weight: 700;
}

.floating-text span {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Offer Section */
.offer-section {
  padding: 40px 0 50px;
}

.pricing-card {
  background: #ffffff;
  border: 2px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 820px;
  margin: 0 auto 36px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
}

.pricing-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 20px;
}

.pricing-title-group h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.pricing-title-group p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Course Summary Box */
.course-summary-box {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 20px 24px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
}

.summary-item {
  display: flex;
  flex-direction: column;
}

.summary-label {
  font-size: 0.82rem;
  color: #64748b;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.summary-val {
  font-size: 1.45rem;
  font-weight: 900;
  color: var(--primary);
  margin-top: 2px;
}

.summary-val.highlight-val {
  color: var(--accent);
}

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

/* Course Parameters Grid */
.params-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.param-item {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 10px;
}

.param-icon {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.param-info h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  font-weight: 600;
}

.param-info p {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Key Highlights Section */
.highlights-card {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 820px;
  margin: 0 auto 36px;
  box-shadow: var(--shadow-md);
}

.highlights-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.highlights-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.96rem;
  line-height: 1.5;
  color: #334155;
}

.check-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--emerald-bg);
  border: 1px solid var(--emerald-border);
  color: var(--emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* Transparent Disclosure Banner */
.transparency-banner {
  background: var(--amber-bg);
  border: 1px solid var(--amber-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.transparency-icon {
  color: var(--amber);
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: 1px;
}

.transparency-text {
  font-size: 0.88rem;
  color: #78350f;
  line-height: 1.5;
}

.transparency-text strong {
  display: block;
  font-weight: 700;
  margin-bottom: 2px;
  color: #92400e;
}

/* Section Header Centered */
.section-header-centered {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 36px;
}

.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid var(--primary-border);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  font-weight: 900;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Roadmap Section */
.roadmap-section {
  padding: 60px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.roadmap-card {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
}

.roadmap-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-border);
}

.phase-badge {
  font-size: 0.72rem;
  font-weight: 800;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  display: inline-block;
  width: fit-content;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.phase-1 { background: #fee2e2; color: #991b1b; }
.phase-2 { background: #fef3c7; color: #92400e; }
.phase-3 { background: #dbeafe; color: #1e40af; }
.phase-4 { background: #d1fae5; color: #065f46; }

.phase-sessions {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.phase-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
  line-height: 1.35;
}

.phase-desc {
  font-size: 0.85rem;
  color: #475569;
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.phase-points {
  list-style: none;
  font-size: 0.8rem;
  color: #334155;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-color);
}

.phase-points li {
  line-height: 1.4;
}

/* Ecosystem Section */
.ecosystem-section {
  padding: 60px 0;
  background: var(--bg-page);
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}

.ecosystem-box {
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.ecosystem-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
}

.eco-classroom::before {
  background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
}

.eco-app::before {
  background: linear-gradient(90deg, #3b82f6 0%, #06b6d4 100%);
}

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

.ecosystem-box h3 {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 10px;
}

.eco-lead {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 20px;
}

.eco-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 0.88rem;
  color: #334155;
}

.eco-features li {
  line-height: 1.5;
  position: relative;
  padding-left: 20px;
}

.eco-features li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--primary);
  font-size: 1.4rem;
  line-height: 1;
  top: -2px;
}

/* FAQ Section */
.faq-section {
  padding: 60px 0;
  background: #ffffff;
  border-top: 1px solid var(--border-color);
}

.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #ffffff;
  transition: border-color 0.2s;
}

.faq-item.active {
  border-color: var(--primary-border);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 18px 22px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-family: inherit;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--text-muted);
  transition: transform 0.25s ease;
  line-height: 1;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-answer {
  display: none;
  padding: 0 22px 20px;
  font-size: 0.9rem;
  color: #475569;
  line-height: 1.6;
}

.faq-item.active .faq-answer {
  display: block;
}

/* Form Section */
.form-section {
  padding: 50px 0 60px;
  background: linear-gradient(180deg, var(--bg-page) 0%, #fff5f5 100%);
}

.form-wrapper {
  max-width: 720px;
  margin: 0 auto;
}

.form-card {
  background: #ffffff;
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-xl);
  position: relative;
}

.form-header {
  text-align: center;
  margin-bottom: 28px;
}

.form-header h2 {
  font-size: 1.55rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 6px;
}

.form-header p {
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Error Banner */
.error-banner {
  display: none;
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 20px;
  line-height: 1.4;
}

/* Form Groups */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-label .req {
  color: var(--accent);
  margin-left: 2px;
}

.form-label .helper {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 2px;
}

.form-control {
  width: 100%;
  padding: 13px 16px;
  font-size: 0.95rem;
  font-family: inherit;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  background-color: #ffffff;
  color: var(--text-main);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

select.form-control {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* Slot Radio Cards */
.slot-radio-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.radio-card {
  position: relative;
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-surface-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
}

.radio-card:hover {
  border-color: var(--border-highlight);
  background: #ffffff;
}

.radio-card input[type="radio"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  margin-right: 14px;
  cursor: pointer;
}

.radio-card:has(input[type="radio"]:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.radio-card-content {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.slot-badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: #ffffff;
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.slot-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Checkboxes */
.checkbox-group {
  margin-bottom: 16px;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: #334155;
  cursor: pointer;
  line-height: 1.45;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  margin-top: 2px;
  flex-shrink: 0;
  cursor: pointer;
}

.checkbox-label a {
  color: var(--primary);
  text-decoration: underline;
  font-weight: 600;
}

/* Submit Button */
.submit-btn {
  width: 100%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  color: #ffffff;
  font-size: 1.05rem;
  font-weight: 800;
  padding: 16px 24px;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: var(--shadow-xl);
  transition: all 0.25s ease;
  margin-top: 10px;
}

.submit-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 16px 28px rgba(159, 18, 57, 0.35);
}

.submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

/* Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Thank You Card */
.thank-you-card {
  display: none; /* Shown immediately on successful form submission */
  background: #ffffff;
  border: 2px solid var(--emerald-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--shadow-xl);
  text-align: center;
  animation: fade-in-up 0.4s ease;
}

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.thank-you-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--emerald-bg);
  color: var(--emerald);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 20px;
  border: 1px solid var(--emerald-border);
}

.thank-you-card h2 {
  font-size: 1.65rem;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 12px;
}

.thank-you-card .notice-box {
  background: var(--bg-surface-subtle);
  border: 1px solid var(--border-color);
  padding: 16px 20px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: #334155;
  margin: 20px 0 28px;
  line-height: 1.6;
  text-align: left;
}

.thank-you-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 420px;
  margin: 0 auto;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 20px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.action-btn-tel {
  background: #059669;
  color: #fff;
}

.action-btn-tel:hover {
  background: #047857;
}

.action-btn-zalo {
  background: #0068ff;
  color: #fff;
}

.action-btn-zalo:hover {
  background: #0056d6;
}

.action-btn-fb {
  background: #1877f2;
  color: #fff;
}

.action-btn-fb:hover {
  background: #1263cf;
}

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

.action-btn-app:hover {
  background: var(--primary-hover);
}

/* Footer */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 40px 0 24px;
  margin-top: auto;
  font-size: 0.88rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid #1e293b;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-copy {
  padding-top: 20px;
  text-align: center;
  font-size: 0.8rem;
  color: #64748b;
}

/* Sticky Mobile Bar */
.sticky-mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 10px 14px;
  box-shadow: 0 -4px 14px rgba(0, 0, 0, 0.08);
  border-top: 1px solid var(--border-color);
  z-index: 40;
}

.sticky-mobile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 8px;
}

.btn-sticky {
  padding: 11px 10px;
  border-radius: var(--radius-full);
  font-weight: 800;
  font-size: 0.88rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  transition: all 0.2s ease;
}

.btn-sticky-call {
  background: #f1f5f9;
  color: #0f172a;
  border: 1px solid #cbd5e1;
}

.btn-sticky-call:hover {
  background: #e2e8f0;
}

.btn-sticky-zalo {
  background: #0068ff;
  color: #ffffff;
  border: 1px solid #0056d6;
}

.btn-sticky-zalo:hover {
  background: #0056d6;
}

.hero-zalo-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #bfdbfe;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s ease;
  margin-top: 4px;
}

.hero-zalo-cta:hover {
  background: #dbeafe;
  color: #1e40af;
}

.btn-sticky-register {
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(159, 18, 57, 0.25);
}

.btn-sticky-register:hover {
  box-shadow: 0 6px 14px rgba(159, 18, 57, 0.35);
}

/* Policy Modals */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #ffffff;
  border-radius: var(--radius-lg);
  max-width: 600px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: 32px;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.modal-close-btn {
  position: absolute;
  top: 18px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-muted);
  line-height: 1;
}

.modal-content h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
}

.modal-body {
  font-size: 0.9rem;
  color: #334155;
  line-height: 1.6;
}

.modal-body h4 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 16px 0 6px;
}

/* Responsive Media Queries */
@media (max-width: 768px) {
  .hero-section {
    padding: 32px 0 24px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .hero-left {
    text-align: center;
  }

  .hero-desc {
    margin: 0 auto 24px;
  }

  .hero-cta-group {
    align-items: center;
  }

  .hero-floating-card {
    position: static;
    margin-top: 8px;
    animation: none;
    width: 100%;
    justify-content: flex-start;
  }

  .floating-card-top, .floating-card-bottom {
    position: static;
  }

  .hero-image-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
  
  .pricing-card {
    padding: 24px 20px;
  }
  
  .pricing-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .form-card, .thank-you-card {
    padding: 24px 18px;
  }

  .sticky-mobile-cta {
    display: block;
  }

  body {
    padding-bottom: 60px;
  }
}