/* ============================================================
   96M Brand Hub — Main Stylesheet
   Colors: White, Blue (#0052CC), Orange (#FF6B35)
   Mobile-first responsive
   ============================================================ */

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

:root {
  --blue:        #0052CC;
  --blue-dark:   #003D99;
  --blue-mid:    #1A65E8;
  --blue-light:  #EBF2FF;
  --orange:      #FF6B35;
  --orange-dark: #E5541F;
  --orange-light:#FFF0EB;
  --white:       #FFFFFF;
  --gray-50:     #F9FAFB;
  --gray-100:    #F3F4F6;
  --gray-200:    #E5E7EB;
  --gray-500:    #6B7280;
  --gray-600:    #4B5563;
  --gray-700:    #374151;
  --gray-800:    #1F2937;
  --gray-900:    #111827;
  --radius:      8px;
  --radius-lg:   16px;
  --shadow-sm:   0 1px 3px rgb(0 0 0 / .08);
  --shadow-md:   0 4px 12px rgb(0 0 0 / .10);
  --shadow-lg:   0 10px 30px rgb(0 0 0 / .12);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.65;
  font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---- Layout ---- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---- Nav ---- */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 200;
  box-shadow: var(--shadow-sm);
}

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

.nav-logo {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: -0.5px;
  text-decoration: none;
}

.nav-logo .accent { color: var(--orange); }

.nav-links {
  display: none;
  list-style: none;
  align-items: center;
  gap: 0.125rem;
}

.nav-links a {
  display: block;
  padding: 0.45rem 0.7rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover { background: var(--blue-light); color: var(--blue); }
.nav-links a.active { color: var(--blue); font-weight: 600; }

.nav-links .btn-nav-cta {
  background: var(--orange);
  color: var(--white) !important;
  padding: 0.45rem 1rem !important;
  font-weight: 700 !important;
}

.nav-links .btn-nav-cta:hover {
  background: var(--orange-dark) !important;
  text-decoration: none;
}

.hamburger {
  background: none;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 0;
}

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gray-800);
  border-radius: 2px;
  transition: 0.25s;
}

.hamburger.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--gray-100);
  padding: 0.75rem 1.25rem 1rem;
}

.mobile-menu.open { display: block; }

.mobile-menu a {
  display: block;
  padding: 0.65rem 0.75rem;
  color: var(--gray-700);
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: var(--radius);
  text-decoration: none;
  transition: background 0.15s;
}

.mobile-menu a:hover { background: var(--blue-light); color: var(--blue); }

.mobile-menu .cta-link {
  margin-top: 0.5rem;
  background: var(--orange);
  color: var(--white) !important;
  text-align: center;
  font-weight: 700;
  border-radius: var(--radius);
}

.mobile-menu .cta-link:hover { background: var(--orange-dark) !important; }

/* ---- Breadcrumb ---- */
.breadcrumb {
  background: var(--gray-50);
  border-bottom: 1px solid var(--gray-200);
  padding: 0.6rem 0;
}

.breadcrumb ol {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  font-size: 0.8rem;
  color: var(--gray-500);
}

.breadcrumb ol a { color: var(--blue); }
.breadcrumb ol li + li::before { content: '›'; margin-right: 0.4rem; }

/* ---- Hero ---- */
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-mid) 100%);
  color: var(--white);
  padding: 3.5rem 0;
  text-align: center;
}

.hero-eyebrow {
  display: inline-block;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.28);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.9rem;
  border-radius: 100px;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.hero .lead {
  font-size: 1.05rem;
  opacity: 0.88;
  max-width: 580px;
  margin: 0 auto 2rem;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.hero-trust {
  margin-top: 1.5rem;
  font-size: 0.82rem;
  opacity: 0.7;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  border: 2px solid transparent;
  line-height: 1;
}

.btn:hover { text-decoration: none; }

.btn-orange {
  background: var(--orange);
  color: var(--white);
  border-color: var(--orange);
}

.btn-orange:hover {
  background: var(--orange-dark);
  border-color: var(--orange-dark);
  color: var(--white);
}

.btn-white {
  background: var(--white);
  color: var(--blue);
  border-color: var(--white);
}

.btn-white:hover {
  background: var(--blue-light);
  border-color: var(--blue-light);
  color: var(--blue);
}

.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.55);
}

.btn-outline-white:hover {
  background: rgba(255,255,255,0.12);
  color: var(--white);
}

.btn-blue {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}

.btn-blue:hover {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  color: var(--white);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.075rem;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* ---- Sections ---- */
.section { padding: 4rem 0; }
.section-sm { padding: 2.5rem 0; }
.section-alt { background: var(--gray-50); }
.section-blue { background: var(--blue); color: var(--white); }
.section-blue-grad {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-mid) 100%);
  color: var(--white);
}

.section-header { margin-bottom: 2.5rem; }
.section-header.center { text-align: center; }

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  letter-spacing: -0.3px;
  margin-bottom: 0.6rem;
}

.section-blue .section-title,
.section-blue-grad .section-title { color: var(--white); }

.section-lead {
  font-size: 1rem;
  color: var(--gray-600);
  max-width: 580px;
}

.section-blue .section-lead,
.section-blue-grad .section-lead { color: rgba(255,255,255,0.82); }

/* ---- Grid ---- */
.grid { display: grid; gap: 1.5rem; }
.g1 { grid-template-columns: 1fr; }
.g2 { grid-template-columns: 1fr; }
.g3 { grid-template-columns: 1fr; }
.g4 { grid-template-columns: repeat(2, 1fr); }

/* ---- Card ---- */
.card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s;
}

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

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--blue-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.card-icon.orange { background: var(--orange-light); }

.card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.4rem;
}

.card p {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.65;
}

/* ---- Feature list ---- */
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.925rem;
  color: var(--gray-700);
}

.feature-list li::before {
  content: '✓';
  color: var(--blue);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.05rem;
}

/* ---- Steps ---- */
.steps { display: flex; flex-direction: column; gap: 1.5rem; }

.step {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}

.step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background: var(--blue);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1rem;
}

.step-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.3rem;
}

.step-body p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ---- Ambassadors ---- */
.ambassador-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.amb-avatar {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--blue-light), var(--orange-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto 1rem;
}

.ambassador-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 0.15rem;
}

.ambassador-card .zh { font-size: 0.85rem; color: var(--gray-500); margin-bottom: 0.5rem; }
.ambassador-card .role {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--blue);
  margin-bottom: 0.75rem;
}

.ambassador-card p { font-size: 0.875rem; color: var(--gray-600); }

/* ---- Rating ---- */
.rating-block { text-align: center; }

.rating-score {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
}

.rating-stars { color: #F59E0B; font-size: 1.2rem; letter-spacing: 2px; margin: 0.25rem 0; }
.rating-label { font-size: 0.85rem; color: var(--gray-500); font-weight: 500; }

/* ---- Review criteria ---- */
.criteria-list { display: flex; flex-direction: column; gap: 1rem; }

.criterion {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.criterion-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-700);
  width: 130px;
  flex-shrink: 0;
}

.criterion-bar {
  flex: 1;
  height: 8px;
  background: var(--gray-200);
  border-radius: 100px;
  overflow: hidden;
}

.criterion-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--blue-mid));
  border-radius: 100px;
}

.criterion-score {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--blue);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

/* ---- Bonus card ---- */
.bonus-card {
  background: var(--white);
  border: 2px solid var(--orange);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
}

.bonus-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 120px; height: 120px;
  background: var(--orange-light);
  border-radius: 50%;
  transform: translate(40px, -40px);
}

.bonus-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--orange);
  margin-bottom: 0.5rem;
}

.bonus-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.1;
  margin-bottom: 0.4rem;
}

.bonus-card p { font-size: 0.875rem; color: var(--gray-600); margin-bottom: 1rem; }

/* ---- Table ---- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--gray-200); }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }

thead th {
  background: var(--blue);
  color: var(--white);
  padding: 0.8rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.85rem;
}

tbody td {
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-700);
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) td { background: var(--gray-50); }

/* ---- Info box ---- */
.info-box {
  background: var(--blue-light);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  color: var(--gray-700);
}

.info-box strong { color: var(--blue); }

.warning-box {
  background: #FFFBEB;
  border-left: 4px solid #F59E0B;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1rem 1.25rem;
  font-size: 0.875rem;
  color: #92400E;
}

/* ---- FAQ ---- */
.faq { display: flex; flex-direction: column; gap: 0.6rem; }

.faq-item {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 1rem 1.25rem;
  text-align: left;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-800);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  transition: background 0.15s;
}

.faq-q:hover { background: var(--gray-50); }

.faq-q .faq-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: var(--blue);
  transition: transform 0.25s;
}

.faq-item.open .faq-q .faq-icon { transform: rotate(45deg); }

.faq-a {
  display: none;
  padding: 0 1.25rem 1rem;
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.7;
  border-top: 1px solid var(--gray-100);
  padding-top: 0.75rem;
}

.faq-item.open .faq-a { display: block; }

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
}

.badge-blue { background: var(--blue-light); color: var(--blue); }
.badge-orange { background: var(--orange-light); color: var(--orange-dark); }
.badge-green { background: #D1FAE5; color: #065F46; }

/* ---- CTA section ---- */
.cta-section {
  padding: 4rem 0;
  text-align: center;
}

.cta-section h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  letter-spacing: -0.3px;
}

.cta-section p {
  font-size: 1rem;
  margin-bottom: 2rem;
  opacity: 0.88;
}

/* ---- Two-col layout ---- */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.two-col.reverse .col-visual { order: -1; }

.col-visual {
  background: var(--blue-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-align: center;
  font-size: 4rem;
}

/* ---- Stat ---- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.stat {
  text-align: center;
  padding: 1.25rem;
}

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.section-blue-grad .stat-value,
.section-blue .stat-value { color: var(--white); }

.stat-label {
  font-size: 0.8rem;
  color: var(--gray-600);
  font-weight: 500;
}

.section-blue-grad .stat-label,
.section-blue .stat-label { color: rgba(255,255,255,0.75); }

/* ---- Footer ---- */
.site-footer {
  background: var(--gray-900);
  color: #9CA3AF;
}

.footer-main { padding: 3rem 0 2rem; }

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-brand h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 0.6rem;
}

.footer-brand h2 .accent { color: var(--orange); }
.footer-brand p { font-size: 0.85rem; line-height: 1.7; }

.footer-col h3 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }

.footer-col ul a {
  font-size: 0.875rem;
  color: #9CA3AF;
  text-decoration: none;
  transition: color 0.15s;
}

.footer-col ul a:hover { color: var(--white); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 1.25rem 0;
  text-align: center;
  font-size: 0.8rem;
}

.footer-disclaimer {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  color: #6B7280;
  line-height: 1.6;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (min-width: 560px) {
  .hero-actions { flex-direction: row; justify-content: center; }
  .stat-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .hamburger { display: none; }

  .hero h1 { font-size: 2.6rem; }
  .section-title { font-size: 2rem; }

  .g2 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: repeat(3, 1fr); }
  .g4 { grid-template-columns: repeat(4, 1fr); }

  .two-col { grid-template-columns: 1fr 1fr; }
  .two-col.reverse .col-visual { order: 0; }

  .ambassador-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }

  .criteria-list { gap: 1.25rem; }
}

@media (min-width: 1024px) {
  .hero h1 { font-size: 3rem; }
  .section-title { font-size: 2.1rem; }
}