/* ═══════════════════════════════════════════════════════════════════════
   Minh Đăng Phát — style.css
   Bootstrap 5.3 extension. Red logistics premium theme.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── 1. CSS Custom Properties ───────────────────────────────────────── */
:root {
  --primary:        #c0392b;   /* logistics red */
  --primary-light:  #e74c3c;
  --primary-dark:   #922b21;
  --accent:         #f39c12;   /* amber orange */
  --accent-dark:    #e67e22;
  --accent-light:   #f8c471;
  --text-dark:      #1a1a2e;
  --text-muted:     #6b7280;
  --text-light:     #9ca3af;
  --bg-light:       #f8fafc;
  --bg-white:       #ffffff;
  --border-color:   #e5e7eb;
  --shadow-sm:      0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:      0 4px 16px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:      0 10px 40px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.08);
  --shadow-accent:  0 8px 24px rgba(243,156,18,.30);
  --radius-sm:      6px;
  --radius-md:      12px;
  --radius-lg:      20px;
  --transition:     all .25s cubic-bezier(.4,0,.2,1);
  --section-py:     100px;
  --navbar-h:       70px;
}

/* ── 2. Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--navbar-h); }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-dark);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
}

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

/* ── 3. Utilities ───────────────────────────────────────────────────── */
.text-accent          { color: var(--accent) !important; }
.text-primary-ht      { color: var(--primary) !important; }
.text-white-60        { color: rgba(255,255,255,.6) !important; }
.bg-primary-ht        { background-color: var(--primary) !important; }
.bg-accent            { background-color: var(--accent) !important; }
.fw-800               { font-weight: 800; }
.fw-700               { font-weight: 700; }
.fw-600               { font-weight: 600; }

.section-py           { padding-top: var(--section-py); padding-bottom: var(--section-py); }
.section-py-sm        { padding-top: 64px; padding-bottom: 64px; }

/* Buttons */
.btn-accent {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-accent:hover, .btn-accent:focus {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  box-shadow: var(--shadow-accent);
  transform: translateY(-1px);
}

.btn-outline-accent {
  border: 2px solid var(--accent);
  color: var(--accent);
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-outline-accent:hover {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-accent);
  transform: translateY(-1px);
}

.btn-outline-light-ht {
  border: 2px solid rgba(255,255,255,.5);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-outline-light-ht:hover {
  background: rgba(255,255,255,.12);
  border-color: #fff;
  color: #fff;
}

.btn-primary-ht {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-primary-ht:hover, .btn-primary-ht:focus {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  box-shadow: 0 8px 24px rgba(192,57,43,.30);
  transform: translateY(-1px);
}

/* Section labels */
.section-label {
  display: inline-block;
  padding: .25rem .9rem;
  background: rgba(243,156,18,.12);
  color: var(--accent-dark);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .75rem;
}

.section-label-light {
  display: inline-block;
  padding: .25rem .9rem;
  background: rgba(255,255,255,.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: .75rem;
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: 1rem;
}

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

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* ── 4. Navbar ──────────────────────────────────────────────────────── */
#mainNav {
  height: var(--navbar-h);
  background: transparent;
  transition: background .35s ease, box-shadow .35s ease;
  padding: 0;
}
#mainNav.scrolled {
  background: var(--primary-dark);
  box-shadow: 0 2px 20px rgba(0,0,0,.25);
}
#mainNav .navbar-brand {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: #fff;
}
#mainNav .nav-link {
  font-size: .9rem;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  padding: .4rem .75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
#mainNav .nav-link:hover,
#mainNav .nav-link.active {
  color: var(--accent);
  background: rgba(243,156,18,.08);
}

/* ── 5. Hero ────────────────────────────────────────────────────────── */
#hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
}

#hero.has-bg-image {
  background-image:
    linear-gradient(135deg, rgba(146,43,33,.85) 0%, rgba(192,57,43,.75) 100%),
    var(--hero-bg-image, none);
  background-size: cover;
  background-position: center;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-particles::before,
.hero-particles::after {
  content: '';
  position: absolute;
  border-radius: 50%;
}
.hero-particles::before {
  width: 600px; height: 600px;
  top: -200px; right: -100px;
  background: rgba(243,156,18,.08);
}
.hero-particles::after {
  width: 400px; height: 400px;
  bottom: -150px; left: -80px;
  background: rgba(255,255,255,.04);
}

.hero-content { position: relative; z-index: 2; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(243,156,18,.15);
  border: 1px solid rgba(243,156,18,.3);
  color: var(--accent-light);
  padding: .35rem 1rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.hero-eyebrow::before {
  content: '';
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.8s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: .5; transform: scale(1.4); }
}

.hero-heading {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -.02em;
  margin-bottom: 1.5rem;
}

.hero-sub {
  font-size: 1.125rem;
  color: rgba(255,255,255,.75);
  line-height: 1.75;
  max-width: 540px;
  margin-bottom: 2rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: .875rem;
  margin-bottom: 1.75rem;
}
.hero-cta-group .btn {
  padding: .75rem 2rem;
  font-size: 1rem;
  font-weight: 600;
}

.hero-trust {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: rgba(255,255,255,.6);
  font-size: .875rem;
  margin-bottom: 1.25rem;
}
.hero-trust-avatars { display: flex; }
.hero-trust-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.3);
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: .7rem; font-weight: 700; color: #fff;
  margin-left: -10px;
}
.hero-trust-avatar:first-child { margin-left: 0; }

/* Trust badges row */
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.85);
  padding: .3rem .85rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
}

/* Stats bar */
.hero-stats {
  position: relative; z-index: 2;
  background: rgba(255,255,255,.06);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 1.75rem 2rem;
  margin-top: 2rem;
}
.hero-stat-item {
  text-align: center;
  padding: .5rem;
}
.hero-stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: .25rem;
}
.hero-stat-label {
  font-size: .8rem;
  color: rgba(255,255,255,.65);
  font-weight: 500;
}
.hero-stat-divider {
  width: 1px;
  background: rgba(255,255,255,.15);
  align-self: stretch;
}

/* ── 6. About ───────────────────────────────────────────────────────── */
#about { background: var(--bg-white); }

.about-image-wrap {
  position: relative;
}
.about-image-wrap img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  object-fit: cover;
}
.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-accent);
}
.about-badge-num {
  display: block;
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}
.about-badge-label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  opacity: .9;
}

.about-feature {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.about-feature-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(243,156,18,.1);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
}
.about-feature-title {
  font-weight: 700;
  font-size: .95rem;
  margin-bottom: .25rem;
  color: var(--text-dark);
}
.about-feature-desc {
  font-size: .875rem;
  color: var(--text-muted);
  margin: 0;
}

/* ── 7. Why Us ──────────────────────────────────────────────────────── */
.whyus-section {
  background: var(--primary-dark);
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

.whyus-item {
  text-align: center;
  padding: 1.5rem 1rem;
}

.whyus-icon {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  border: 2px solid rgba(243,156,18,.3);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin: 0 auto 1rem;
  transition: var(--transition);
}
.whyus-item:hover .whyus-icon {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(243,156,18,.35);
}

.whyus-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: .5rem;
}

.whyus-desc {
  font-size: .875rem;
  color: rgba(255,255,255,.6);
  line-height: 1.65;
  margin: 0;
}

/* ── 8. Services ────────────────────────────────────────────────────── */
#services { background: var(--bg-light); }

.service-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 3px;
  background: var(--accent);
  transition: width .35s ease;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}
.service-card:hover::after { width: 100%; }

.service-icon {
  width: 60px; height: 60px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  transition: var(--transition);
}
.service-card:hover .service-icon {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: var(--shadow-accent);
}
.service-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: .625rem;
}
.service-desc {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}
.service-link {
  font-size: .85rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  transition: var(--transition);
}
.service-link:hover { color: var(--accent); gap: .625rem; }

/* ── 9. Process ─────────────────────────────────────────────────────── */
#process { background: var(--bg-white); }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
}
.process-grid::before {
  content: '';
  position: absolute;
  top: 88px;
  left: calc(12.5% + 16px);
  right: calc(12.5% + 16px);
  height: 2px;
  background: linear-gradient(to right, var(--primary), var(--accent));
  z-index: 0;
  opacity: .2;
}

.process-step {
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(192,57,43,.08);
  border: 2px solid rgba(192,57,43,.2);
  font-size: .9rem;
  font-weight: 800;
  color: var(--primary);
  margin: 0 auto .875rem;
}

.process-icon-wrap {
  width: 72px; height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.75rem;
  margin: 0 auto 1rem;
  box-shadow: 0 8px 24px rgba(192,57,43,.25);
  transition: var(--transition);
}
.process-step:hover .process-icon-wrap {
  transform: translateY(-4px);
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: var(--shadow-accent);
}

.process-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: .5rem;
}

.process-desc {
  font-size: .875rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin: 0;
}

/* ── 10. Projects ───────────────────────────────────────────────────── */
#projects { background: var(--bg-light); }

.project-card {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  cursor: pointer;
}
.project-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}
.project-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-light);
}
.project-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.project-card:hover .project-img-wrap img { transform: scale(1.06); }

.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(146,43,33,.9) 0%, rgba(146,43,33,.3) 60%, transparent 100%);
  opacity: 0;
  transition: var(--transition);
  display: flex; align-items: flex-end;
  padding: 1.5rem;
}
.project-card:hover .project-overlay { opacity: 1; }
.project-overlay-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: .5rem 1.25rem;
  font-size: .85rem;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}
.project-overlay-btn:hover { background: var(--accent-dark); color: #fff; }

.project-body {
  background: var(--bg-white);
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}
.project-tag {
  display: inline-block;
  padding: .2rem .65rem;
  background: rgba(192,57,43,.08);
  color: var(--primary);
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  margin-bottom: .625rem;
}
.project-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: .375rem;
}
.project-desc {
  font-size: .85rem;
  color: var(--text-muted);
  margin: 0;
}

/* Filter tabs */
.filter-tabs { gap: .5rem; }
.filter-btn {
  background: var(--bg-light);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: 999px;
  padding: .4rem 1.1rem;
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* ── 11. Testimonials ───────────────────────────────────────────────── */
#testimonials { background: var(--bg-white); }

.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 2rem;
  height: 100%;
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(192,57,43,.15);
}
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: .75rem; right: 1.25rem;
  font-size: 5rem;
  font-weight: 800;
  color: var(--primary);
  opacity: .07;
  line-height: 1;
  font-family: Georgia, serif;
  pointer-events: none;
}

.testimonial-stars {
  color: var(--accent);
  font-size: .9rem;
  margin-bottom: 1rem;
  display: flex;
  gap: .1rem;
}

.testimonial-quote {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
  font-weight: 700;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: .95rem;
  font-weight: 700;
  color: var(--text-dark);
}

.testimonial-company {
  font-size: .8rem;
  color: var(--text-light);
}

/* ── 12. FAQ ────────────────────────────────────────────────────────── */
#faq { background: var(--bg-light); }

.faq-item {
  border: 1px solid var(--border-color) !important;
  border-radius: var(--radius-sm) !important;
  margin-bottom: .75rem;
  overflow: hidden;
}
.faq-item .accordion-button {
  font-weight: 600;
  font-size: .95rem;
  color: var(--text-dark);
  background: var(--bg-white);
  padding: 1.1rem 1.25rem;
}
.faq-item .accordion-button:not(.collapsed) {
  color: var(--primary);
  background: rgba(192,57,43,.04);
  box-shadow: none;
}
.faq-item .accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(192,57,43,.15);
}
.faq-item .accordion-body {
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.75;
  background: var(--bg-white);
  padding: .875rem 1.25rem 1.25rem;
}

/* ── 13. Contact ────────────────────────────────────────────────────── */
#contact { background: var(--bg-light); }

.contact-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.75rem;
}
.contact-info-icon {
  flex-shrink: 0;
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.contact-info-label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-light);
  margin-bottom: .2rem;
}
.contact-info-value {
  font-size: .95rem;
  font-weight: 600;
  color: var(--text-dark);
  text-decoration: none;
  transition: var(--transition);
}
.contact-info-value:hover { color: var(--accent); }

.map-embed {
  width: 100%;
  aspect-ratio: 16/9;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 0;
}

/* Form */
.form-control, .form-select {
  border-color: var(--border-color);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  font-size: .925rem;
  color: var(--text-dark);
  transition: var(--transition);
}
.form-control:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(192,57,43,.12);
}
.form-label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: .4rem;
}
.form-feedback {
  font-size: .8rem;
  margin-top: .375rem;
}
#formSubmitBtn {
  padding: .8rem 2.5rem;
  font-size: 1rem;
  font-weight: 700;
  width: 100%;
}
#formAlert {
  border-radius: var(--radius-sm);
  font-size: .9rem;
}

/* ── 14. Footer ─────────────────────────────────────────────────────── */
.footer {
  background: var(--primary-dark);
  padding: 72px 0 0;
}
.footer-heading {
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.footer-desc {
  color: rgba(255,255,255,.55);
  font-size: .875rem;
  line-height: 1.7;
}
.footer-links a {
  color: rgba(255,255,255,.6);
  font-size: .875rem;
  text-decoration: none;
  display: inline-block;
  margin-bottom: .5rem;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); padding-left: 4px; }

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  margin-bottom: .875rem;
  color: rgba(255,255,255,.6);
  font-size: .875rem;
}
.footer-contact i {
  color: var(--accent);
  font-size: 1rem;
  margin-top: 2px;
  flex-shrink: 0;
}
.footer-contact a {
  color: rgba(255,255,255,.6);
  text-decoration: none;
  transition: var(--transition);
}
.footer-contact a:hover { color: var(--accent); }

.social-btn {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.7);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition);
}
.social-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

.footer-divider {
  border-color: rgba(255,255,255,.1);
  margin: 2.5rem 0 1.5rem;
}
.footer-copy {
  color: rgba(255,255,255,.4);
  font-size: .8rem;
  padding-bottom: 1.5rem;
}
.footer-copy a {
  color: var(--accent);
  text-decoration: none;
}

/* ── 15. Floating CTAs ──────────────────────────────────────────────── */
.floating-cta {
  position: fixed;
  bottom: 5.5rem;
  right: 1.5rem;
  z-index: 1030;
  display: flex;
  flex-direction: column;
  gap: .625rem;
}
.float-btn {
  width: 50px; height: 50px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
  color: #fff;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
  transition: var(--transition);
}
.float-btn:hover { transform: scale(1.1); color: #fff; }
.float-phone { background: var(--primary); }
.float-zalo  { background: #0068ff; }

.back-to-top {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1030;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  box-shadow: var(--shadow-accent);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  display: flex; align-items: center; justify-content: center;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}
.back-to-top:hover { background: var(--accent-dark); transform: translateY(-2px); }

/* ── 16. Responsive ─────────────────────────────────────────────────── */
@media (max-width: 991.98px) {
  :root { --section-py: 72px; }
  .about-badge { right: 0; bottom: -16px; }
  .hero-stats { margin-top: 2rem; }
  .hero-stat-divider { display: none; }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem 1.5rem;
  }
  .process-grid::before { display: none; }
}

@media (max-width: 767.98px) {
  :root { --section-py: 56px; }
  .hero-heading { font-size: 2.25rem; }
  .hero-sub { font-size: 1rem; }
  .hero-cta-group .btn { padding: .65rem 1.5rem; font-size: .925rem; }
  .contact-card { padding: 1.75rem; }
  .floating-cta { bottom: 5rem; right: 1rem; }
  .back-to-top { bottom: 1rem; right: 1rem; }
  .whyus-item { padding: 1rem .5rem; }
  .testimonial-card { padding: 1.5rem; }
}

@media (max-width: 575.98px) {
  .hero-stat-num { font-size: 1.6rem; }
  .service-card { padding: 1.5rem; }
  .filter-tabs { flex-wrap: wrap; }
  .process-grid { grid-template-columns: 1fr; }
  .hero-badges { justify-content: center; }
}