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

:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #dbeafe;
  --color-primary-50: #eff6ff;
  --color-accent: #f59e0b;
  --color-accent-light: #fef3c7;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-bg-dark: #0f172a;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', 'Noto Sans JP', system-ui, -apple-system, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-sm { padding: 8px 20px; font-size: 0.875rem; }
.btn-lg { padding: 14px 32px; font-size: 1.05rem; }
.btn-full { width: 100%; }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-50);
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon { font-size: 1.4rem; }

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

.nav a {
  color: var(--color-text-light);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
  padding: 120px 0 80px;
  background: linear-gradient(135deg, var(--color-primary-50) 0%, #fff 50%, var(--color-accent-light) 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
}

.hero-trust {
  display: flex;
  gap: 24px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.trust-icon {
  color: var(--color-success);
  font-weight: 700;
}

.hero-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  text-align: center;
  border: 1px solid var(--color-border);
}

.hero-card-icon { font-size: 3rem; margin-bottom: 16px; }

.hero-card-stat {
  font-size: 4rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 12px;
}

.hero-card-label {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.5;
}

.hero-card-note {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

/* ========== Sections Common ========== */
.section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-desc {
  color: var(--color-text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ========== Problems ========== */
.problems {
  background: var(--color-bg-alt);
}

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

.problem-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.problem-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.problem-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.problem-card p {
  color: var(--color-text-light);
  font-size: 0.93rem;
  line-height: 1.7;
}

/* ========== Services ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: #fff;
  border-radius: var(--radius-md);
  padding: 32px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.service-tag {
  display: inline-block;
  background: var(--color-bg-alt);
  color: var(--color-text-light);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 12px;
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.93rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-price {
  font-weight: 600;
  color: var(--color-primary);
  font-size: 0.9rem;
}

.service-card-cta {
  background: var(--color-primary-50);
  border-color: var(--color-primary-light);
  display: flex;
  flex-direction: column;
  justify-content: center;
  text-align: center;
}

.service-card-cta .service-icon { font-size: 2.5rem; }

/* ========== Advisor ========== */
.advisor-inner {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 48px;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}

.advisor-img {
  width: 260px;
  height: 320px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  object-position: top center;
  margin: 0 auto;
  display: block;
  border: 3px solid var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.advisor-info h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.advisor-role {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 12px;
}

.advisor-intro {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.8;
  margin-bottom: 20px;
}

.advisor-details {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.advisor-detail {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  color: var(--color-text-light);
}

.advisor-detail-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

.advisor-quote {
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
  font-size: 0.95rem;
}

.advisor-social {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn-social {
  padding: 10px 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  color: #fff;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-social:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-line {
  background: #06c755;
  border: 2px solid #06c755;
}

.btn-zalo {
  background: #0068ff;
  border: 2px solid #0068ff;
}

.btn-facebook {
  background: #1877f2;
  border: 2px solid #1877f2;
}

.btn-tiktok {
  background: #010101;
  border: 2px solid #010101;
}

@media (max-width: 900px) {
  .advisor-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .advisor-img {
    width: 200px;
    height: 250px;
  }

  .advisor-details {
    align-items: center;
  }

  .advisor-quote {
    border-left: none;
    border-top: 4px solid var(--color-primary);
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  }

  .advisor-social {
    justify-content: center;
  }
}

.service-card-cta p {
  margin-bottom: 24px;
}

/* ========== Process ========== */
.process {
  background: var(--color-bg-alt);
}

.process-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 24px;
}

.step {
  flex: 1;
  max-width: 280px;
  text-align: center;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 40px 32px;
  border: 1px solid var(--color-border);
}

.step-number {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.step p {
  color: var(--color-text-light);
  font-size: 0.93rem;
  line-height: 1.7;
}

.step-arrow {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-top: 56px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item[open] {
  box-shadow: var(--shadow-sm);
}

.faq-item summary {
  padding: 20px 24px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition);
}

.faq-item summary:hover {
  background: var(--color-bg-alt);
}

.faq-item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item p {
  padding: 0 24px 20px;
  color: var(--color-text-light);
  line-height: 1.7;
  font-size: 0.95rem;
}

/* ========== Contact ========== */
.contact {
  background: var(--color-bg-dark);
  color: #fff;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.contact-info .highlight {
  color: var(--color-accent);
}

.contact-info > p {
  color: #94a3b8;
  font-size: 1.05rem;
  margin-bottom: 32px;
}

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

.contact-feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.contact-feature span:first-child {
  color: var(--color-success);
  font-size: 1.1rem;
}

/* ========== Contact Social ========== */
.contact-social {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #334155;
}

.contact-social-label {
  color: #94a3b8;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.contact-social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ========== Google Form Embed ========== */
.google-form-wrapper {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.google-form-wrapper iframe {
  display: block;
  width: 100%;
  min-height: 1669px;
  border: none;
}

/* ========== Footer ========== */
.footer {
  background: var(--color-bg-dark);
  border-top: 1px solid #1e293b;
  padding: 40px 0;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}

.footer-desc {
  color: #64748b;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}

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

.footer-copy {
  color: #475569;
  font-size: 0.8rem;
}

/* ========== Responsive ========== */
@media (max-width: 900px) {
  .nav, .header .btn { display: none; }
  .mobile-menu-btn { display: flex; }

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

  .hero h1 { font-size: 2rem; }

  .hero-cta { flex-direction: column; }
  .hero-trust { flex-direction: column; gap: 8px; }

  .hero-visual { order: -1; }
  .hero-card { padding: 28px; }
  .hero-card-stat { font-size: 3rem; }

  .problems-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .process-steps {
    flex-direction: column;
    align-items: center;
  }

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

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

  .section { padding: 60px 0; }
  .section-header h2 { font-size: 1.6rem; }
}

@media (max-width: 600px) {
  .hero { padding: 100px 0 60px; }
  .hero h1 { font-size: 1.7rem; }
  .hero-desc { font-size: 1rem; }

  .contact-form { padding: 24px; }
  .footer-links { flex-wrap: wrap; justify-content: center; }
}