/* ============================================
   LIBERTY INC. — Premium Corporate Redesign
   Aesthetic: Cinematic Navy / Electric Blue
   ============================================ */

:root {
  --navy-900: #04091e;
  --navy-800: #0a1128;
  --navy-700: #0f1a3a;
  --navy-600: #162350;
  --blue-500: #1a5cad;
  --blue-400: #2d7fe0;
  --blue-300: #4da3ff;
  --electric: #00c2ff;
  --white: #ffffff;
  --gray-100: #f0f4f8;
  --gray-200: #dce3ed;
  --gray-400: #8a9bb5;
  --gray-600: #4a5a72;
  --gray-800: #2a3546;
  --gold: #c9a84c;
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Zen Kaku Gothic New', 'Noto Sans JP', sans-serif;
  --font-mono: 'Montserrat', sans-serif;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--gray-800);
  line-height: 1.8;
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Grain overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

ul { list-style: none; }

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ============================================
   Loading Screen
   ============================================ */
.loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--navy-900);
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader-text {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 12px;
  overflow: hidden;
}

.loader-text span {
  display: inline-block;
  animation: loaderReveal 0.6s ease forwards;
  opacity: 0;
  transform: translateY(100%);
}

@keyframes loaderReveal {
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Header
   ============================================ */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding: 0;
}

header.scrolled {
  background: rgba(4, 9, 30, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
  height: 90px;
  transition: height 0.4s ease;
}

header.scrolled .header-inner {
  height: 70px;
}

.logo a {
  font-size: 26px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 4px;
  font-family: var(--font-display);
  position: relative;
}

.logo span {
  font-size: 10px;
  display: block;
  color: rgba(255,255,255,0.4);
  letter-spacing: 2px;
  font-weight: 400;
  margin-top: 2px;
  font-family: var(--font-body);
}

nav ul {
  display: flex;
  gap: 0;
}

nav ul li a {
  display: block;
  padding: 32px 24px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2.5px;
  color: rgba(255,255,255,0.7);
  position: relative;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

nav ul li a::before {
  content: '';
  position: absolute;
  bottom: 24px;
  left: 24px;
  right: 24px;
  height: 1px;
  background: var(--electric);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

nav ul li a:hover {
  color: var(--white);
}

nav ul li a:hover::before {
  transform: scaleX(1);
  transform-origin: left;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 7px;
  z-index: 1001;
  width: 32px;
}

.hamburger span {
  width: 100%;
  height: 1.5px;
  background: var(--white);
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transform-origin: center;
}

.hamburger span:nth-child(2) {
  width: 60%;
  margin-left: auto;
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 6px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
  width: 100%;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -6px);
}

/* ============================================
   Hero
   ============================================ */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  background: var(--navy-900);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://images.unsplash.com/photo-1497366216548-37526070297c?w=1920&q=80') center/cover no-repeat;
  opacity: 0.15;
  transform: scale(1.1);
  animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
  from { transform: scale(1.1); }
  to { transform: scale(1.2); }
}

.hero-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(26,92,173,0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0,194,255,0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(4,9,30,0.8) 0%, transparent 60%);
}

#particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

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

.hero-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 6px;
  color: var(--electric);
  text-transform: uppercase;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 1s ease 0.5s forwards;
}

.hero-content h1 {
  font-size: 80px;
  font-weight: 900;
  letter-spacing: 8px;
  line-height: 1.05;
  font-family: var(--font-display);
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 1s ease 0.7s forwards;
}

.hero-content h1 .accent {
  background: linear-gradient(135deg, var(--blue-300), var(--electric));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .hero-sub {
  font-size: 18px;
  letter-spacing: 5px;
  font-weight: 300;
  color: rgba(255,255,255,0.6);
  opacity: 0;
  animation: fadeUp 1s ease 0.9s forwards;
}

.hero-line {
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--electric), transparent);
  margin: 30px auto;
  opacity: 0;
  animation: fadeUp 1s ease 1.1s forwards;
}

.hero-scroll {
  position: absolute;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: fadeUp 1s ease 1.5s forwards;
}

.hero-scroll p {
  font-size: 10px;
  letter-spacing: 4px;
  color: rgba(255,255,255,0.3);
  font-family: var(--font-mono);
  text-transform: uppercase;
}

.hero-scroll .scroll-line {
  width: 1px;
  height: 50px;
  position: relative;
  overflow: hidden;
  background: rgba(255,255,255,0.1);
}

.hero-scroll .scroll-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--electric));
  animation: scrollDrop 2s ease infinite;
}

@keyframes scrollDrop {
  0% { top: -100%; }
  100% { top: 100%; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================
   Section Common
   ============================================ */
section {
  padding: 120px 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
  position: relative;
}

.section-header .section-num {
  font-family: var(--font-display);
  font-size: 120px;
  font-weight: 900;
  color: rgba(26,92,173,0.04);
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translateX(-50%);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.section-header .section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 5px;
  color: var(--electric);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: block;
}

.section-header h2 {
  font-size: 48px;
  font-weight: 900;
  color: var(--navy-900);
  letter-spacing: 6px;
  font-family: var(--font-display);
  margin-bottom: 12px;
}

.section-header .section-sub {
  font-size: 14px;
  color: var(--gray-400);
  letter-spacing: 2px;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-60px);
  transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-right {
  opacity: 0;
  transform: translateX(60px);
  transition: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-left.is-visible,
.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ============================================
   Concept Section
   ============================================ */
.concept {
  background: var(--navy-900);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.concept::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 30% 0%, rgba(26,92,173,0.2) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 100%, rgba(0,194,255,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.concept .section-header h2 {
  color: var(--white);
}

.concept .section-header .section-num {
  color: rgba(255,255,255,0.03);
}

.concept-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  position: relative;
  z-index: 1;
}

.concept-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
}

.concept-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,194,255,0.08), transparent);
  opacity: 0;
  transition: opacity 0.5s ease;
}

.concept-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0,194,255,0.2);
  box-shadow: 0 20px 60px rgba(0,0,0,0.4), 0 0 40px rgba(0,194,255,0.08);
}

.concept-card:hover::before {
  opacity: 1;
}

.concept-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  filter: brightness(0.7) saturate(0.8);
  transition: all 0.6s ease;
}

.concept-card:hover .concept-card-img {
  filter: brightness(0.85) saturate(1);
  transform: scale(1.05);
}

.concept-card-body {
  padding: 36px 32px;
  position: relative;
  z-index: 1;
}

.concept-card-body .card-num {
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--electric);
  margin-bottom: 12px;
}

.concept-card-body h3 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 6px;
  font-family: var(--font-display);
}

.concept-card-body .card-sub {
  font-size: 12px;
  color: var(--gray-400);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.concept-card-body .card-text {
  font-size: 14px;
  line-height: 2;
  color: rgba(255,255,255,0.5);
}

/* ============================================
   Service Section
   ============================================ */
.service-section {
  background: var(--white);
}

.service-items {
  display: flex;
  flex-direction: column;
  gap: 100px;
}

.service-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.service-item.reverse {
  direction: rtl;
}

.service-item.reverse > * {
  direction: ltr;
}

.service-item-img {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
}

.service-item-img::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(26,92,173,0.1), transparent);
  pointer-events: none;
}

.service-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.service-item:hover .service-item-img img {
  transform: scale(1.08);
}

/* Decorative frame */
.service-item-img::before {
  content: '';
  position: absolute;
  top: 16px;
  left: 16px;
  right: -16px;
  bottom: -16px;
  border: 1px solid var(--blue-400);
  border-radius: 12px;
  z-index: -1;
  opacity: 0.2;
  transition: all 0.5s ease;
}

.service-item:hover .service-item-img::before {
  top: 12px;
  left: 12px;
  right: -12px;
  bottom: -12px;
  opacity: 0.4;
}

.service-item-text .num {
  font-size: 80px;
  font-weight: 900;
  font-family: var(--font-display);
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(135deg, rgba(26,92,173,0.12), rgba(0,194,255,0.06));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.service-item-text h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--navy-900);
  margin-bottom: 8px;
  letter-spacing: 1px;
  font-family: var(--font-display);
}

.service-item-text .en-title {
  font-size: 11px;
  color: var(--electric);
  letter-spacing: 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 24px;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 12px;
}

.service-item-text .en-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--electric), transparent);
  max-width: 80px;
}

.service-item-text p {
  font-size: 15px;
  line-height: 2;
  color: var(--gray-600);
}

/* ============================================
   Company Section
   ============================================ */
.company-section {
  background: var(--gray-100);
  position: relative;
}

.company-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--blue-500), var(--electric), var(--blue-500));
}

.company-table {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 60px rgba(0,0,0,0.06);
}

.company-table table {
  width: 100%;
  border-collapse: collapse;
}

.company-table th,
.company-table td {
  padding: 24px 36px;
  border-bottom: 1px solid var(--gray-200);
  font-size: 15px;
  text-align: left;
  vertical-align: top;
}

.company-table tr:last-child th,
.company-table tr:last-child td {
  border-bottom: none;
}

.company-table th {
  width: 200px;
  font-weight: 700;
  color: var(--navy-900);
  background: rgba(26,92,173,0.03);
  font-size: 14px;
  letter-spacing: 1px;
  position: relative;
}

.company-table th::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  background: var(--blue-500);
  border-radius: 2px;
}

.company-table td {
  color: var(--gray-600);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
  background: var(--navy-900);
  text-align: center;
  color: var(--white);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(26,92,173,0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 50% 100%, rgba(0,194,255,0.1) 0%, transparent 40%);
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 3px;
  font-family: var(--font-display);
}

.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 40px;
  line-height: 2;
}

.cta-btn {
  display: inline-block;
  padding: 18px 64px;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 4px;
  border-radius: 60px;
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,194,255,0.2), transparent);
  transition: left 0.6s ease;
}

.cta-btn:hover {
  border-color: var(--electric);
  box-shadow: 0 0 30px rgba(0,194,255,0.15);
}

.cta-btn:hover::before {
  left: 100%;
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
  text-align: center;
  background: var(--white);
}

.contact-info {
  margin-bottom: 50px;
}

.contact-info p {
  font-size: 15px;
  color: var(--gray-600);
}

.contact-form {
  max-width: 720px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 28px;
  text-align: left;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy-900);
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.form-group label .required {
  font-size: 10px;
  color: var(--white);
  background: var(--blue-500);
  padding: 3px 10px;
  border-radius: 20px;
  margin-left: 10px;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 16px 20px;
  border: 1px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  font-family: var(--font-body);
  transition: all 0.4s ease;
  background: var(--gray-100);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--blue-400);
  background: var(--white);
  box-shadow: 0 0 0 4px rgba(26,92,173,0.08);
}

.form-group textarea {
  height: 180px;
  resize: vertical;
}

.submit-btn {
  display: inline-block;
  padding: 18px 80px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-400));
  color: var(--white);
  border: none;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  border-radius: 60px;
  cursor: pointer;
  transition: all 0.4s ease;
  font-family: var(--font-mono);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.submit-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  transition: all 0.6s ease;
  transform: translate(-50%, -50%);
}

.submit-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(26,92,173,0.35);
}

.submit-btn:hover::after {
  width: 300px;
  height: 300px;
}

/* ============================================
   Footer
   ============================================ */
footer {
  background: var(--navy-900);
  color: var(--white);
  padding: 60px 0 24px;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--blue-500), var(--electric), var(--blue-500), transparent);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-logo a {
  font-size: 22px;
  font-weight: 800;
  color: var(--white);
  letter-spacing: 4px;
  font-family: var(--font-display);
}

.footer-logo p {
  font-size: 11px;
  color: rgba(255,255,255,0.3);
  margin-top: 8px;
  letter-spacing: 1px;
}

.footer-nav ul {
  display: flex;
  gap: 36px;
}

.footer-nav a {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 2px;
  font-family: var(--font-mono);
  text-transform: uppercase;
}

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

.copyright {
  text-align: center;
  padding-top: 24px;
  font-size: 11px;
  color: rgba(255,255,255,0.2);
  letter-spacing: 2px;
  font-family: var(--font-mono);
}

/* ============================================
   Page Header (sub pages)
   ============================================ */
.page-header {
  padding: 180px 0 80px;
  background: var(--navy-900);
  text-align: center;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    url('https://images.unsplash.com/photo-1497366216548-37526070297c?w=1920&q=80') center/cover no-repeat;
  opacity: 0.08;
}

.page-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(26,92,173,0.3) 0%, transparent 60%);
}

.page-header h1 {
  font-size: 56px;
  font-weight: 900;
  letter-spacing: 8px;
  font-family: var(--font-display);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.page-header .page-sub {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  letter-spacing: 4px;
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
}

.page-header .page-line {
  width: 40px;
  height: 2px;
  background: var(--electric);
  margin: 20px auto 0;
  position: relative;
  z-index: 1;
}

/* ============================================
   Back to Top
   ============================================ */
.back-to-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  width: 52px;
  height: 52px;
  background: var(--navy-900);
  color: var(--electric);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.4s ease;
  border: 1px solid rgba(0,194,255,0.2);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--blue-500);
  color: var(--white);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,194,255,0.2);
}

/* ============================================
   Map
   ============================================ */
.map-container {
  margin-top: 50px;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 60px rgba(0,0,0,0.06);
}

.map-container iframe {
  width: 100%;
  height: 400px;
  border: none;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .header-inner {
    height: 64px;
    padding: 0 20px;
  }

  header.scrolled .header-inner {
    height: 56px;
  }

  .logo a {
    font-size: 20px;
    letter-spacing: 2px;
  }

  .logo span {
    font-size: 8px;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: var(--navy-900);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-left: 1px solid rgba(255,255,255,0.05);
  }

  nav.active {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    text-align: center;
    gap: 0;
  }

  nav ul li a {
    padding: 22px 40px;
    font-size: 14px;
  }

  nav ul li a::before {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    min-height: 600px;
  }

  .hero-content h1 {
    font-size: 36px;
    letter-spacing: 4px;
  }

  .hero-content .hero-sub {
    font-size: 13px;
    letter-spacing: 3px;
  }

  .hero-label {
    font-size: 10px;
    letter-spacing: 4px;
  }

  .loader-text {
    font-size: 28px;
    letter-spacing: 8px;
  }

  section {
    padding: 80px 0;
  }

  .section-header h2 {
    font-size: 32px;
    letter-spacing: 3px;
  }

  .section-header .section-num {
    font-size: 70px;
    top: -30px;
  }

  .concept-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-item {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .service-item.reverse {
    direction: ltr;
  }

  .service-item-img::before {
    display: none;
  }

  .service-item-text .num {
    font-size: 50px;
  }

  .service-item-text h3 {
    font-size: 22px;
  }

  .company-table th,
  .company-table td {
    display: block;
    width: 100%;
    padding: 14px 20px;
  }

  .company-table th {
    border-bottom: none;
    padding-bottom: 4px;
  }

  .company-table th::before {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    gap: 30px;
    text-align: center;
    padding: 0 20px 30px;
  }

  .footer-nav ul {
    flex-direction: column;
    gap: 16px;
  }

  .cta-section h2 {
    font-size: 24px;
    letter-spacing: 1px;
  }

  .page-header {
    padding: 130px 0 50px;
  }

  .page-header h1 {
    font-size: 32px;
    letter-spacing: 4px;
  }
}