/* ============================================================
   SKYBRIDGE HK — Global Stylesheet
   Style: Corporate, clean, modern, global trade / logistics
   ============================================================ */

/* ---------- RESET & BASE ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --navy:       #0B1F3F;
  --navy-dark:  #071628;
  --navy-light: #142D54;
  --steel:      #3B82C4;
  --steel-light:#5BA0D9;
  --teal:       #2A9D8F;
  --white:      #FFFFFF;
  --gray-50:    #F8F9FB;
  --gray-100:   #F1F3F6;
  --gray-200:   #E2E6EB;
  --gray-300:   #C9CED6;
  --gray-500:   #6B7280;
  --gray-700:   #374151;
  --gray-900:   #111827;
  --shadow-sm:  0 1px 3px rgba(11,31,63,0.08);
  --shadow-md:  0 4px 12px rgba(11,31,63,0.10);
  --shadow-lg:  0 8px 30px rgba(11,31,63,0.12);

  /* Spacing – 8px system */
  --sp-1: 8px;
  --sp-2: 16px;
  --sp-3: 24px;
  --sp-4: 32px;
  --sp-5: 40px;
  --sp-6: 48px;
  --sp-8: 64px;
  --sp-10: 80px;
  --sp-12: 96px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-family);
  font-size: 17px;
  line-height: 1.65;
  color: var(--gray-700);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--steel);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--navy);
}

h1, h2, h3, h4 {
  color: var(--navy);
  font-weight: 700;
  line-height: 1.2;
}

h1 { font-size: clamp(40px, 5vw, 56px); }
h2 { font-size: clamp(28px, 3.5vw, 40px); }
h3 { font-size: clamp(20px, 2vw, 24px); }
h4 { font-size: 18px; }

/* ---------- CONTAINER ---------- */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--sp-3);
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 15px;
  border: 2px solid transparent;
  border-radius: 50px;
  padding: 12px 28px;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}
.btn-primary:hover {
  background: var(--navy-light);
  border-color: var(--navy-light);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--navy);
  border-color: var(--gray-300);
}
.btn-outline:hover {
  border-color: var(--navy);
  color: var(--navy);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 14px 36px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

/* ---------- SECTIONS ---------- */
.section {
  padding: var(--sp-12) 0;
}
.section-alt {
  background: var(--gray-50);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--sp-8);
}
.section-title {
  margin-bottom: var(--sp-2);
}
.section-intro {
  font-size: 18px;
  color: var(--gray-500);
  line-height: 1.7;
}

.section-cta {
  text-align: center;
  margin-top: var(--sp-6);
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 1px 12px rgba(11,31,63,0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.logo, .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.3px;
}
.logo-hk {
  color: var(--steel);
}

/* Nav */
.nav-list {
  display: flex;
  list-style: none;
  gap: var(--sp-4);
}
.nav-list a {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
  transition: color var(--transition);
  position: relative;
}
.nav-list a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--steel);
  transition: width var(--transition);
}
.nav-list a:hover,
.nav-list a.active {
  color: var(--navy);
}
.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

.header-cta {
  font-size: 14px;
  padding: 10px 24px;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding-top: 140px;
  padding-bottom: var(--sp-10);
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: center;
}

.hero-title {
  margin-bottom: var(--sp-2);
  letter-spacing: -1px;
}
.hero-subtitle {
  font-size: clamp(18px, 2vw, 22px);
  color: var(--steel);
  font-weight: 500;
  margin-bottom: var(--sp-3);
}
.hero-body {
  font-size: 17px;
  color: var(--gray-700);
  margin-bottom: var(--sp-4);
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-4);
  flex-wrap: wrap;
}

.trust-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.trust-bullets li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--gray-500);
}
.check-icon {
  width: 18px;
  height: 18px;
  color: var(--teal);
  flex-shrink: 0;
}

/* Hero Image */
.hero-image {
  position: relative;
}
.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  width: 100%;
  max-height: 480px;
}
.hero-image-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(11,31,63,0.85);
  backdrop-filter: blur(6px);
  color: var(--white);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 50px;
}

/* ============================================================
   STATS STRIP
   ============================================================ */
.stats-strip {
  background: var(--navy);
  padding: var(--sp-6) 0;
}
.stats-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
}
.stat-item {
  text-align: center;
  flex: 1;
  max-width: 260px;
}
.stat-number {
  font-size: clamp(36px, 4vw, 52px);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}
.stat-plus {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  color: var(--steel-light);
}
.stat-caption {
  display: block;
  font-size: 14px;
  color: var(--gray-300);
  margin-top: 6px;
  font-weight: 400;
}
.stat-divider {
  width: 1px;
  height: 56px;
  background: rgba(255,255,255,0.15);
}

/* ============================================================
   LOGO STRIP
   ============================================================ */
.logo-strip {
  padding: var(--sp-6) 0;
  border-bottom: 1px solid var(--gray-200);
}
.logo-strip-title {
  text-align: center;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--gray-500);
  font-weight: 600;
  margin-bottom: var(--sp-4);
}
.logo-strip-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-8);
  flex-wrap: wrap;
}
.partner-logo {
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-300);
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: var(--sp-2) var(--sp-3);
  border: 1px dashed var(--gray-200);
  border-radius: var(--radius-sm);
  user-select: none;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--sp-8);
  align-items: start;
}
.about-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: cover;
  width: 100%;
  max-height: 500px;
}
.about-content .section-title {
  text-align: left;
  margin-bottom: var(--sp-3);
}
.about-content p {
  margin-bottom: var(--sp-2);
}
.about-content > .btn {
  margin-top: var(--sp-4);
}

/* Value Tiles */
.value-tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}
.value-tile {
  background: var(--white);
  padding: var(--sp-3);
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  transition: box-shadow var(--transition), transform var(--transition);
}
.value-tile:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.value-icon {
  width: 40px;
  height: 40px;
  background: var(--gray-100);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-1);
  color: var(--steel);
}
.value-icon svg {
  width: 22px;
  height: 22px;
}
.value-tile h4 {
  font-size: 15px;
  margin-bottom: 4px;
}
.value-tile p {
  font-size: 13px;
  color: var(--gray-500);
  margin-bottom: 0;
  line-height: 1.5;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services-banner {
  margin-bottom: var(--sp-6);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-height: 220px;
}
.services-banner img {
  width: 100%;
  object-fit: cover;
  height: 220px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-3);
}

.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: var(--sp-4);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.service-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--gray-50), var(--gray-100));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--sp-2);
  color: var(--steel);
}
.service-icon svg {
  width: 24px;
  height: 24px;
}
.service-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}
.service-card p {
  font-size: 15px;
  color: var(--gray-500);
  margin-bottom: var(--sp-2);
  line-height: 1.6;
}
.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--steel);
}
.card-link:hover {
  color: var(--navy);
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-3);
}
.product-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: var(--sp-4) var(--sp-3);
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}
.product-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.product-icon {
  width: 56px;
  height: 56px;
  background: var(--gray-100);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--sp-2);
  color: var(--steel);
}
.product-icon svg {
  width: 28px;
  height: 28px;
}
.product-card h3 {
  font-size: 18px;
  margin-bottom: 6px;
}
.product-card p {
  font-size: 14px;
  color: var(--gray-500);
}

/* ============================================================
   MARKETS
   ============================================================ */
.markets-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-8);
  align-items: start;
}
.markets-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: cover;
  width: 100%;
}
.markets-data h3 {
  margin-bottom: var(--sp-3);
}
.region-bars {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}
.region-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
}
.region-name {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-700);
}
.region-pct {
  font-size: 15px;
  font-weight: 700;
  color: var(--navy);
}
.region-bar {
  height: 10px;
  background: var(--gray-100);
  border-radius: 6px;
  overflow: hidden;
}
.region-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--navy), var(--steel));
  border-radius: 6px;
  width: 0;
  transition: width 1.2s ease;
}

/* ============================================================
   TESTIMONIALS
   ============================================================ */
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-3);
}
.testimonial-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: var(--sp-4);
  transition: box-shadow var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
}
.quote-icon {
  width: 32px;
  height: 32px;
  color: var(--gray-200);
  margin-bottom: var(--sp-2);
}
.quote-icon svg {
  width: 32px;
  height: 32px;
}
.testimonial-text {
  font-size: 16px;
  color: var(--gray-700);
  line-height: 1.7;
  margin-bottom: var(--sp-3);
  font-style: italic;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}
.author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.author-name {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
}
.author-role {
  display: block;
  font-size: 13px;
  color: var(--gray-500);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-8);
  align-items: start;
}

/* Form */
.contact-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2);
}
.form-full {
  grid-column: 1 / -1;
}
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  font-family: var(--font-family);
  font-size: 15px;
  padding: 12px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--gray-700);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--steel);
  box-shadow: 0 0 0 3px rgba(59,130,196,0.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

/* Contact Info Sidebar */
.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.info-block {
  background: var(--gray-50);
  border-radius: var(--radius);
  padding: var(--sp-3);
}
.info-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
}
.info-block p {
  font-size: 15px;
  color: var(--gray-500);
  line-height: 1.7;
}
.info-block a {
  color: var(--steel);
}

.social-links {
  display: flex;
  gap: 12px;
}
.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  color: var(--gray-500);
  transition: all var(--transition);
}
.social-link svg {
  width: 18px;
  height: 18px;
}
.social-link:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--white);
}

/* Map Placeholder */
.map-placeholder {
  position: relative;
  overflow: hidden;
  padding: 0;
}
.map-placeholder img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius);
  filter: grayscale(0.5) opacity(0.6);
}
.map-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--navy);
  background: rgba(255,255,255,0.5);
  border-radius: var(--radius);
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--navy-dark);
  color: var(--gray-300);
  padding-top: var(--sp-8);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--sp-6);
  padding-bottom: var(--sp-6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-about .logo-text {
  color: var(--white);
}
.footer-about p {
  margin-top: var(--sp-2);
  font-size: 14px;
  color: var(--gray-300);
  line-height: 1.7;
  max-width: 300px;
}

.footer-links h4,
.footer-contact h4 {
  color: var(--white);
  font-size: 15px;
  margin-bottom: var(--sp-2);
}
.footer-links ul {
  list-style: none;
}
.footer-links li {
  margin-bottom: 8px;
}
.footer-links a {
  font-size: 14px;
  color: var(--gray-300);
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--white);
}

.footer-contact p {
  font-size: 14px;
  line-height: 1.8;
}
.footer-contact a {
  color: var(--gray-300);
}
.footer-contact a:hover {
  color: var(--white);
}

.footer-bottom {
  padding: var(--sp-3) 0;
}
.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.footer-bottom p {
  font-size: 13px;
  color: var(--gray-500);
}
.footer-legal {
  display: flex;
  list-style: none;
  gap: var(--sp-3);
}
.footer-legal a {
  font-size: 13px;
  color: var(--gray-500);
}
.footer-legal a:hover {
  color: var(--white);
}

/* ============================================================
   ANIMATIONS  — Scroll reveal
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
  }
  .hero-image {
    order: -1;
    max-width: 600px;
    margin: 0 auto;
  }
  .hero-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
  }
  .hero-body {
    max-width: 100%;
  }
  .hero-actions {
    justify-content: center;
  }
  .trust-bullets {
    align-items: center;
  }

  .about-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
  }
  .about-image {
    max-width: 500px;
    margin: 0 auto;
  }
  .about-content .section-title {
    text-align: center;
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .markets-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
  }
  .markets-image {
    max-width: 500px;
    margin: 0 auto;
  }
  .contact-inner {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-5);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--white);
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    transition: right 0.35s ease;
    padding: 80px var(--sp-3) var(--sp-4);
    z-index: 999;
  }
  .main-nav.open {
    right: 0;
  }
  .nav-list {
    flex-direction: column;
    gap: 0;
  }
  .nav-list a {
    display: block;
    padding: 14px 0;
    font-size: 17px;
    border-bottom: 1px solid var(--gray-100);
  }
  .nav-list a::after {
    display: none;
  }
  .header-cta {
    display: none;
  }
  .mobile-toggle {
    display: flex;
  }
  .mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .mobile-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .section {
    padding: var(--sp-8) 0;
  }
  .hero {
    padding-top: 110px;
    padding-bottom: var(--sp-6);
  }
  .stats-inner {
    flex-direction: column;
    gap: var(--sp-4);
  }
  .stat-divider {
    width: 60px;
    height: 1px;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
  .products-grid {
    grid-template-columns: 1fr 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .contact-form {
    grid-template-columns: 1fr;
  }
  .form-full {
    grid-column: 1;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }
  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
  .value-tiles {
    grid-template-columns: 1fr;
  }
  .logo-strip-row {
    gap: var(--sp-3);
  }
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 998;
}
.nav-overlay.active {
  display: block;
}