/* =========================================
   LICONEO — Design System
   Primary: #1B3A6B | Gold: #C9A84C | White: #FFF
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700;800&family=Open+Sans:wght@400;500;600&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --navy:      #1E5FA8;
  --navy-dark: #153C7A;
  --navy-mid:  #2D72CC;
  --gold:      #C9A84C;
  --gold-light:#e2c06e;
  --white:     #FFFFFF;
  --gray-50:   #F5F7FA;
  --gray-100:  #EEF2F7;
  --gray-200:  #D1D9E6;
  --gray-500:  #6B7A99;
  --gray-700:  #374257;
  --dark:      #0D1B2A;
  --text:      #1A2440;

  --font-head: 'Montserrat', sans-serif;
  --font-body: 'Open Sans', sans-serif;

  --radius-sm: 4px;
  --radius:    8px;
  --radius-lg: 16px;

  --shadow-sm: 0 2px 8px rgba(27,58,107,.08);
  --shadow:    0 8px 32px rgba(27,58,107,.12);
  --shadow-lg: 0 20px 60px rgba(27,58,107,.18);

  --transition: .3s cubic-bezier(.4,0,.2,1);
  --section-pad: 96px 0;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; overflow-x: hidden; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5 { font-family: var(--font-head); line-height: 1.25; color: var(--navy); }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); font-weight: 700; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 700; }
h4 { font-size: 1.1rem; font-weight: 600; }
p  { font-size: 1rem; color: var(--gray-700); line-height: 1.8; }

/* ---------- Layout ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section    { padding: var(--section-pad); }
.section-sm { padding: 64px 0; }

/* ---------- Section Header ---------- */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .tag {
  display: inline-block;
  background: rgba(201,168,76,.15);
  color: var(--gold);
  font-family: var(--font-head);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 100px;
  margin-bottom: 14px;
}
.section-header h2 { margin-bottom: 16px; }
.section-header p  { max-width: 580px; margin: 0 auto; }
.divider {
  width: 56px; height: 3px;
  background: var(--gold);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-head);
  font-size: .9rem; font-weight: 700;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: .02em;
  white-space: nowrap;
}
.btn-primary {
  background: var(--gold); color: var(--navy-dark);
  border-color: var(--gold);
}
.btn-primary:hover {
  background: var(--gold-light); border-color: var(--gold-light);
  transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,.4);
}
.btn-outline {
  background: rgba(255,255,255,.08); color: var(--white);
  border-color: rgba(255,255,255,.75);
  backdrop-filter: blur(6px);
}
.btn-outline:hover {
  background: rgba(255,255,255,.18); border-color: var(--white);
  transform: translateY(-2px);
}
.btn-navy {
  background: var(--navy); color: var(--white);
  border-color: var(--navy);
}
.btn-navy:hover {
  background: var(--navy-mid); border-color: var(--navy-mid);
  transform: translateY(-2px); box-shadow: var(--shadow);
}
.btn-lg { padding: 18px 40px; font-size: 1rem; }
.btn-sm { padding: 10px 22px; font-size: .85rem; }

/* ==========================================
   HEADER / NAV
   ========================================== */
#header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  transition: var(--transition);
  padding: 0;
}
#header.transparent { background: transparent; }
#header.scrolled {
  background: var(--white);
  box-shadow: 0 2px 20px rgba(27,58,107,.1);
}
#header.scrolled .nav-logo img.logo-light { display: none; }
#header.scrolled .nav-logo img.logo-dark  { display: block; }
#header.transparent .nav-logo img.logo-light { display: block; }
#header.transparent .nav-logo img.logo-dark  { display: none; }

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-logo .logo-text {
  font-family: var(--font-head); font-weight: 800; font-size: 1.4rem;
  letter-spacing: .04em;
  transition: var(--transition);
}
#header.transparent .nav-logo .logo-text { color: var(--white); }
#header.scrolled   .nav-logo .logo-text { color: var(--navy); }

.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-item { position: relative; }
.nav-link {
  display: block; padding: 8px 14px;
  font-family: var(--font-head); font-size: .875rem; font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
#header.transparent .nav-link { color: rgba(255,255,255,.9); }
#header.scrolled   .nav-link { color: var(--gray-700); }
.nav-link:hover, .nav-link.active {
  color: var(--gold) !important;
  background: rgba(201,168,76,.08);
}

/* Dropdown */
.nav-dropdown {
  position: absolute; top: calc(100% + 8px); left: 0;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  min-width: 240px;
  opacity: 0; visibility: hidden;
  transform: translateY(8px);
  transition: var(--transition);
  border-top: 3px solid var(--gold);
}
.nav-item:hover .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown a {
  display: block; padding: 10px 20px;
  font-size: .875rem; font-weight: 500; color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
  transition: var(--transition);
}
.nav-dropdown a:last-child { border-bottom: none; }
.nav-dropdown a:hover { color: var(--navy); background: var(--gray-50); padding-left: 26px; }

/* Right controls */
.nav-right { display: flex; align-items: center; gap: 16px; }
.lang-toggle {
  display: flex; align-items: center; gap: 2px;
  background: rgba(255,255,255,.15);
  border-radius: 100px;
  padding: 4px;
  transition: var(--transition);
}
#header.scrolled .lang-toggle { background: var(--gray-100); }
.lang-btn {
  padding: 4px 12px;
  font-family: var(--font-head); font-size: .75rem; font-weight: 700;
  border-radius: 100px; cursor: pointer;
  transition: var(--transition);
  border: none; background: transparent;
}
#header.transparent .lang-btn { color: rgba(255,255,255,.7); }
#header.scrolled    .lang-btn { color: var(--gray-500); }
.lang-btn.active {
  background: var(--gold) !important;
  color: var(--navy-dark) !important;
}

.nav-cta { /* handled by .btn */ }

/* Mobile menu */
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 24px; height: 2px; border-radius: 2px;
  background: var(--white); transition: var(--transition);
}
#header.scrolled .hamburger span { background: var(--navy); }
.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.mobile-menu {
  display: none;
  position: fixed; top: 76px; left: 0; right: 0; bottom: 0;
  background: var(--navy-dark);
  padding: 32px 24px;
  overflow-y: auto;
  z-index: 999;
  flex-direction: column; gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block; padding: 14px 18px;
  color: rgba(255,255,255,.85); font-family: var(--font-head);
  font-size: 1rem; font-weight: 600;
  border-bottom: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.mobile-menu a:hover { color: var(--gold); background: rgba(255,255,255,.05); }

/* ==========================================
   HERO
   ========================================== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  overflow: hidden;
}
/* Slideshow: 4 slides, total cycle = 24s, each visible ~6s */
.hero-bg .slide {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center center;
  opacity: 0;
  animation: heroFade 24s infinite;
  transform: scale(1);
  transition: transform 6s ease;
}
.hero-bg .slide.s1 {
  background-image: url('https://images.pexels.com/photos/14840752/pexels-photo-14840752.jpeg?auto=compress&cs=tinysrgb&w=1920');
  animation-delay: 0s;
}
.hero-bg .slide.s2 {
  background-image: url('https://images.pexels.com/photos/29470001/pexels-photo-29470001.jpeg?auto=compress&cs=tinysrgb&w=1920');
  animation-delay: 6s;
}
.hero-bg .slide.s3 {
  background-image: url('https://images.pexels.com/photos/15391048/pexels-photo-15391048.jpeg?auto=compress&cs=tinysrgb&w=1920');
  animation-delay: 12s;
}
.hero-bg .slide.s4 {
  background-image: url('https://images.pexels.com/photos/15743467/pexels-photo-15743467.jpeg?auto=compress&cs=tinysrgb&w=1920');
  animation-delay: 18s;
}
@keyframes heroFade {
  0%    { opacity: 0;    transform: scale(1.086); }
  5%    { opacity: 1;    transform: scale(1.086); }
  22%   { opacity: 1;    transform: scale(1.014); }
  27%   { opacity: 0;    transform: scale(1);     }
  100%  { opacity: 0;    transform: scale(1.086); }
}
/* Tăng sắc nét & độ sáng ảnh nền */
.hero-bg .slide {
  filter: brightness(1.08) contrast(1.04) saturate(1.1);
}
/* ── Overlay: tối trái (cho chữ), trong suốt phải (lộ ảnh sáng) ── */
.hero-bg::after {
  content: '';
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(
      to right,
      rgba(8,18,36,.75) 0%,
      rgba(8,18,36,.58) 30%,
      rgba(8,18,36,.22) 62%,
      rgba(8,18,36,.04) 100%
    ),
    linear-gradient(
      to top,
      rgba(8,18,36,.35) 0%,
      transparent 40%
    );
}

/* ── Hero content: căn chỉnh, breathing room ── */
.hero-content {
  position: relative; z-index: 2;
  padding: 110px 0 72px;
  max-width: 540px;
}

/* ── Tag badge ── */
.hero-tag {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(201,168,76,.12);
  border: 1px solid rgba(201,168,76,.55);
  color: #e8c96a;
  font-family: var(--font-head); font-size: .72rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase;
  padding: 7px 18px; border-radius: 100px;
  margin-bottom: 22px;
  backdrop-filter: blur(4px);
}
.hero-tag::before {
  content: ''; display: block; flex-shrink: 0;
  width: 6px; height: 6px;
  background: #e8c96a; border-radius: 50%;
  box-shadow: 0 0 6px rgba(232,201,106,.7);
}

/* ── H1: to, rõ, cân đối ── */
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 3.8rem);
  line-height: 1.18;
  color: var(--white);
  max-width: 500px;
  margin-bottom: 22px;
  text-shadow: 0 2px 28px rgba(0,0,0,.45);
  letter-spacing: -.01em;
}
.hero h1 span {
  color: #f0d060;
  text-shadow: 0 0 32px rgba(240,208,96,.35);
}

/* ── Subtitle ── */
.hero-sub {
  font-size: 1.02rem;
  line-height: 1.78;
  color: rgba(255,255,255,.82);
  max-width: 470px;
  margin-bottom: 36px;
}

/* ── CTA buttons ── */
.hero-actions {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-bottom: 52px;
}

/* ── Stats bar: glassmorphism nhẹ ── */
.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; max-width: 460px;
  background: rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.22);
  box-shadow: 0 4px 24px rgba(0,0,0,.18);
}
.stat-item {
  padding: 18px 20px;
  background: rgba(255,255,255,.06);
  text-align: center;
  transition: background .25s;
}
.stat-item:hover { background: rgba(255,255,255,.12); }
.stat-item .num {
  font-family: var(--font-head); font-size: 2rem; font-weight: 800;
  color: #f0d060; line-height: 1;
  text-shadow: 0 0 20px rgba(240,208,96,.3);
}
.stat-item .label {
  font-size: .72rem; color: rgba(255,255,255,.72);
  font-weight: 600; margin-top: 5px;
  letter-spacing: .04em;
}

/* Scroll indicator */
.scroll-down {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(255,255,255,.55); font-size: .65rem;
  font-family: var(--font-head); letter-spacing: .14em; text-transform: uppercase;
}
.scroll-down .arrow {
  width: 22px; height: 22px;
  border-right: 2px solid rgba(255,255,255,.5);
  border-bottom: 2px solid rgba(255,255,255,.5);
  transform: rotate(45deg);
  animation: bounce 1.6s ease-in-out infinite;
}
@keyframes bounce {
  0%,100% { transform: rotate(45deg) translateY(0);   opacity: .55; }
  50%      { transform: rotate(45deg) translateY(6px); opacity: 1;   }
}

/* ==========================================
   ABOUT STRIP
   ========================================== */
.about-strip {
  background: linear-gradient(135deg, #EEF5FF 0%, #F5F7FA 100%);
  padding: 72px 0;
  border-top: 4px solid var(--navy);
}
.about-strip .container {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; align-items: center;
}
.about-strip-text h2 { color: var(--navy); margin-bottom: 16px; }
.about-strip-text h2 span { color: var(--gold); }
.about-strip-text p { color: var(--gray-700); margin-bottom: 24px; }
.about-strip-text .btn { margin-right: 12px; }

.about-strip-counters {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.counter-card {
  background: var(--white);
  border: 1.5px solid var(--gray-200);
  border-bottom: 3px solid var(--gold);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}
.counter-card:hover { border-color: var(--navy); border-bottom-color: var(--gold); transform: translateY(-4px); box-shadow: var(--shadow); }
.counter-card .num {
  font-family: var(--font-head); font-size: 2.5rem; font-weight: 800;
  color: var(--navy); line-height: 1; display: block;
}
.counter-card .unit {
  font-family: var(--font-head); font-size: 1.5rem; font-weight: 800;
  color: var(--navy);
}
.counter-card p { color: var(--gray-500); font-size: .875rem; margin-top: 6px; }

/* ==========================================
   SERVICES
   ========================================== */
.services { background: var(--gray-50); }
.service-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex; flex-direction: column;
}
.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
.service-card:hover .service-img img { transform: scale(1.06); }
.service-img { position: relative; overflow: hidden; height: 220px; }
.service-img img { width: 100%; height: 100%; object-fit: cover; transition: .5s ease; }
.service-num {
  position: absolute; top: 16px; left: 16px;
  background: var(--gold); color: var(--navy-dark);
  font-family: var(--font-head); font-size: .75rem; font-weight: 800;
  padding: 4px 12px; border-radius: 100px;
}
.service-body { padding: 28px; flex: 1; display: flex; flex-direction: column; }
.service-icon {
  width: 48px; height: 48px;
  background: rgba(27,58,107,.08);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}
.service-body h3 { margin-bottom: 12px; color: var(--navy); }
.service-body p  { color: var(--gray-500); font-size: .9rem; flex: 1; }
.service-tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0; }
.service-tag {
  font-size: .75rem; font-family: var(--font-head); font-weight: 600;
  padding: 4px 12px; border-radius: 100px;
  background: var(--gray-100); color: var(--navy-mid);
}
.service-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--navy); font-family: var(--font-head); font-size: .85rem; font-weight: 700;
  margin-top: auto;
  transition: var(--transition);
}
.service-link::after { content: '→'; transition: var(--transition); }
.service-link:hover { color: var(--gold); }
.service-link:hover::after { transform: translateX(4px); }

/* ==========================================
   PROJECTS
   ========================================== */
.projects { background: var(--white); }
.projects-filter {
  display: flex; gap: 8px; flex-wrap: wrap;
  justify-content: center; margin-bottom: 40px;
}
.filter-btn {
  padding: 8px 22px;
  font-family: var(--font-head); font-size: .8rem; font-weight: 700;
  border: 2px solid var(--gray-200); background: var(--white);
  color: var(--gray-500); border-radius: 100px;
  cursor: pointer; transition: var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  border-color: var(--navy); background: var(--navy); color: var(--white);
}
.projects-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.project-card {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.project-card img {
  width: 100%; height: 100%; object-fit: cover;
  transition: .6s ease;
}
.project-card:hover img { transform: scale(1.08); }
.project-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(13,27,42,.92) 0%, transparent 60%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 24px;
  transition: var(--transition);
}
.project-card:hover .project-overlay {
  background: linear-gradient(to top, rgba(27,58,107,.95) 0%, rgba(27,58,107,.4) 100%);
}
.project-badge {
  display: inline-block;
  background: var(--gold); color: var(--navy-dark);
  font-family: var(--font-head); font-size: .7rem; font-weight: 800;
  padding: 3px 10px; border-radius: 100px;
  margin-bottom: 8px; align-self: flex-start;
}
.project-overlay h4 { color: var(--white); margin-bottom: 4px; }
.project-meta { color: rgba(255,255,255,.65); font-size: .8rem; }
.project-meta span + span::before { content: ' · '; }

.projects-more { text-align: center; margin-top: 40px; }

/* ==========================================
   EQUIPMENT STRIP
   ========================================== */
.equipment-strip { background: var(--gray-50); }
.equipment-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 64px; align-items: center;
}
.equipment-img-wrap { position: relative; }
.equipment-img-wrap img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
}
.equip-badge {
  position: absolute; bottom: -20px; right: -20px;
  background: var(--gold); color: var(--navy-dark);
  border-radius: var(--radius-lg);
  padding: 20px 28px;
  box-shadow: var(--shadow);
  font-family: var(--font-head);
}
.equip-badge .num { font-size: 2rem; font-weight: 800; line-height: 1; display: block; }
.equip-badge .lbl { font-size: .75rem; font-weight: 700; }

.equipment-list { display: flex; flex-direction: column; gap: 16px; margin: 32px 0; }
.equip-item {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 18px 20px;
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--navy);
  transition: var(--transition);
}
.equip-item:hover { border-left-color: var(--gold); box-shadow: var(--shadow); transform: translateX(4px); }
.equip-item .icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.equip-item h4 { color: var(--navy); margin-bottom: 2px; }
.equip-item p  { font-size: .85rem; margin: 0; }

/* ==========================================
   WHY US
   ========================================== */
.why-us { background: var(--white); }
.why-us .section-header .tag  { background: rgba(30,95,168,.1); color: var(--navy); }
.why-us .section-header h2    { color: var(--navy); }
.why-us .section-header p     { color: var(--gray-700); }
.why-us .divider              { background: var(--gold); }

.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.why-card {
  text-align: center; padding: 36px 24px;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.why-card:hover {
  background: var(--white);
  border-color: var(--navy);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.why-icon {
  width: 68px; height: 68px;
  background: rgba(30,95,168,.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
  transition: var(--transition);
}
.why-card:hover .why-icon { background: var(--navy); }
.why-card h4 { color: var(--navy); margin-bottom: 10px; }
.why-card p  { color: var(--gray-500); font-size: .875rem; }

/* ==========================================
   PARTNERS
   ========================================== */
.partners { background: var(--white); padding: 64px 0; }
.partners .section-header { margin-bottom: 40px; }
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px; align-items: center;
}
.partner-item {
  padding: 16px 20px;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  min-height: 64px;
  font-family: var(--font-head); font-size: .8rem; font-weight: 700;
  color: var(--gray-500);
  transition: var(--transition);
  text-align: center;
}
.partner-item:hover {
  border-color: var(--navy);
  color: var(--navy);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* ==========================================
   CONTACT CTA
   ========================================== */
.cta-section {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  padding: 80px 0;
}
.cta-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.cta-text h2 { color: var(--white); margin-bottom: 16px; }
.cta-text h2 span { color: var(--gold); }
.cta-text p  { color: rgba(255,255,255,.75); margin-bottom: 32px; }
.cta-info { display: flex; flex-direction: column; gap: 16px; }
.cta-info-item {
  display: flex; align-items: center; gap: 14px;
  color: rgba(255,255,255,.85); font-size: .9rem;
}
.cta-info-item .ico {
  width: 40px; height: 40px; flex-shrink: 0;
  background: rgba(201,168,76,.2); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
}

.cta-form {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 40px; box-shadow: var(--shadow-lg);
}
.cta-form h3 { color: var(--navy); margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block; font-family: var(--font-head); font-size: .8rem; font-weight: 700;
  color: var(--navy); margin-bottom: 6px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px;
  border: 1.5px solid var(--gray-200); border-radius: var(--radius);
  font-family: var(--font-body); font-size: .9rem; color: var(--text);
  background: var(--white);
  transition: var(--transition);
  outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--navy); box-shadow: 0 0 0 3px rgba(27,58,107,.08);
}
.form-group textarea { resize: vertical; min-height: 90px; }
.form-submit { width: 100%; padding: 16px; font-size: 1rem; }

/* ==========================================
   FOOTER
   ========================================== */
.footer { background: var(--dark); padding: 64px 0 0; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px; margin-bottom: 48px;
}
.footer-brand .brand-logo {
  font-family: var(--font-head); font-size: 1.4rem; font-weight: 800;
  color: var(--white); letter-spacing: .04em;
  margin-bottom: 6px;
}
.footer-brand .brand-logo span { color: var(--gold); }
.footer-tagline {
  color: rgba(255,255,255,.45); font-size: .8rem; margin-bottom: 20px;
  font-family: var(--font-head); letter-spacing: .06em;
}
.footer-desc { color: rgba(255,255,255,.55); font-size: .875rem; margin-bottom: 24px; }
.social-links { display: flex; gap: 10px; }
.social-link {
  width: 36px; height: 36px;
  background: rgba(255,255,255,.08); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.6); font-size: .9rem;
  transition: var(--transition);
}
.social-link:hover { background: var(--gold); color: var(--navy-dark); transform: translateY(-2px); }

.footer-col h5 {
  color: var(--white); font-family: var(--font-head); font-size: .85rem;
  font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a {
  color: rgba(255,255,255,.55); font-size: .875rem;
  transition: var(--transition); display: flex; align-items: center; gap: 6px;
}
.footer-col ul a::before { content: '›'; color: var(--gold); }
.footer-col ul a:hover { color: var(--gold); padding-left: 4px; }

.footer-contact { display: flex; flex-direction: column; gap: 12px; }
.footer-contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  color: rgba(255,255,255,.55); font-size: .875rem;
}
.footer-contact-item .ico { color: var(--gold); flex-shrink: 0; margin-top: 2px; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 24px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.footer-bottom p { color: rgba(255,255,255,.35); font-size: .8rem; }
.footer-bottom span { color: var(--gold); }

/* ==========================================
   FLOATING CONTACT
   ========================================== */
.floating-contact {
  position: fixed; right: 24px; bottom: 24px; z-index: 900;
  display: flex; flex-direction: column; gap: 10px;
  align-items: flex-end;
}
.float-btn {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px 12px 16px;
  border-radius: 100px;
  font-family: var(--font-head); font-size: .85rem; font-weight: 700;
  cursor: pointer; border: none;
  box-shadow: 0 4px 20px rgba(0,0,0,.25);
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}
.float-btn:hover { transform: translateX(-4px) scale(1.03); }
.float-btn .ico {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.float-zalo { background: #0068FF; color: var(--white); }
.float-zalo .ico { background: rgba(255,255,255,.2); }
.float-phone { background: var(--gold); color: var(--navy-dark); }
.float-phone .ico { background: rgba(27,58,107,.2); }

/* ==========================================
   ANIMATIONS
   ========================================== */
.fade-up {
  opacity: 0; transform: translateY(32px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-left {
  opacity: 0; transform: translateX(-32px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-left.visible { opacity: 1; transform: translateX(0); }
.fade-right {
  opacity: 0; transform: translateX(32px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-right.visible { opacity: 1; transform: translateX(0); }
.stagger .fade-up:nth-child(1) { transition-delay: .0s; }
.stagger .fade-up:nth-child(2) { transition-delay: .12s; }
.stagger .fade-up:nth-child(3) { transition-delay: .24s; }
.stagger .fade-up:nth-child(4) { transition-delay: .36s; }

/* ==========================================
   PAGE HERO (inner pages)
   ========================================== */
.page-hero {
  padding: 140px 0 64px;
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute; top: -50%; right: -10%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(201,168,76,.15) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero h1 { color: var(--white); margin-bottom: 12px; }
.page-hero p  { color: rgba(255,255,255,.75); max-width: 540px; }
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--font-head); font-size: .8rem; font-weight: 600;
  color: rgba(255,255,255,.5); margin-bottom: 20px;
}
.breadcrumb a { color: var(--gold); }
.breadcrumb span::before { content: '/'; margin-right: 8px; }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
  .service-grid      { grid-template-columns: 1fr 1fr; }
  .projects-grid     { grid-template-columns: 1fr 1fr; }
  .why-grid          { grid-template-columns: 1fr 1fr; }
  .footer-grid       { grid-template-columns: 1fr 1fr; }
  .partners-grid     { grid-template-columns: repeat(4, 1fr); }
  .equipment-grid    { grid-template-columns: 1fr; }
  .equip-badge       { bottom: 16px; right: 16px; }
  .about-strip .container { grid-template-columns: 1fr; }
  .cta-inner         { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  :root { --section-pad: 64px 0; }
  .nav-menu, .nav-cta { display: none; }
  .lang-toggle { display: flex; }
  .hamburger { display: flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
  /* Hamburger luôn hiển thị rõ: trắng trên transparent, navy trên scrolled */
  #header.transparent .hamburger span { background: var(--white) !important; }
  #header.scrolled .hamburger span    { background: var(--navy) !important; }
  /* Fix: header container không được vượt quá viewport — tránh hamburger bị lệch trên Android */
  #header .container { width: 100% !important; max-width: 100% !important; padding-left: 16px !important; padding-right: 16px !important; box-sizing: border-box !important; }
  .nav-inner { width: 100%; max-width: 100%; overflow: hidden; }
  .hero-stats { grid-template-columns: 1fr 1fr 1fr; }
  .service-grid      { grid-template-columns: 1fr; }
  .projects-grid     { grid-template-columns: 1fr 1fr; }
  .why-grid          { grid-template-columns: 1fr 1fr; }
  .footer-grid       { grid-template-columns: 1fr; gap: 32px; }
  .partners-grid     { grid-template-columns: repeat(3, 1fr); }
  .form-row          { grid-template-columns: 1fr; }
  .footer-bottom     { flex-direction: column; gap: 8px; text-align: center; }
  .about-img         { border-radius: var(--radius-lg); background: #eef0f4; }
  .about-img img     { height: auto; object-fit: contain; }
  .float-btn .lbl    { display: none; }
  .float-btn         { padding: 12px; }
  .float-btn .ico    { width: 44px; height: 44px; font-size: 1.3rem; }
}
@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .why-grid      { grid-template-columns: 1fr; }
  .hero-actions  { flex-direction: column; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
}