/* ============================================
   R5 Trading — Premium Black & White + Gold Accent
   ============================================ */

:root {
  --black: #000000;
  --black-soft: #0a0a0a;
  --black-card: #111111;
  --black-elevated: #1a1a1a;
  --white: #ffffff;
  --accent: #f9c43a;
  --accent-light: #fbd96a;
  --accent-dark: #c9a020;
  --accent-glow: rgba(249, 196, 58, 0.35);
  --accent-soft: rgba(249, 196, 58, 0.1);
  --gold: #f9c43a;
  --gold-light: #fbd96a;
  --gold-dark: #c9a020;
  --gold-gradient: #f9c43a;
  --gold-glow: rgba(249, 196, 58, 0.35);
  --text: #f5f0e8;
  --text-muted: #9a958a;
  --border: rgba(255, 255, 255, 0.12);
  --border-hover: rgba(249, 196, 58, 0.4);
  --font-main: 'Montserrat', sans-serif;
  --font-cn: 'Noto Sans SC', 'Montserrat', sans-serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --header-h: 80px;
}

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

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

body {
  font-family: var(--font-main);
  font-weight: 400;
  background: var(--black);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.lang-zh {
  font-family: var(--font-cn);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

.container {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.gold-text {
  color: var(--accent);
}

/* ========== Preloader ========== */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: var(--black);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.8s, visibility 0.8s;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.preloader-inner {
  text-align: center;
}

.preloader-logo {
  width: 180px;
  margin: 0 auto 2rem;
  animation: preloaderPulse 2s ease-in-out infinite;
}

.preloader-bar {
  width: 200px;
  height: 2px;
  background: var(--black-elevated);
  margin: 0 auto;
  overflow: hidden;
  border-radius: 2px;
}

.preloader-progress {
  height: 100%;
  width: 0%;
  background: var(--gold-gradient);
  animation: preloaderLoad 2s ease forwards;
}

@keyframes preloaderPulse {
  0%, 100% { opacity: 0.7; transform: scale(0.98); }
  50% { opacity: 1; transform: scale(1); }
}

@keyframes preloaderLoad {
  to { width: 100%; }
}

/* ========== Scroll Progress ========== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--gold-gradient);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ========== Cursor Glow ========== */
.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249, 196, 58, 0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

@media (max-width: 768px) {
  .cursor-glow { display: none; }
}

/* ========== Header ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-h);
  transition: background var(--transition), backdrop-filter var(--transition), box-shadow var(--transition);
}

.header.scrolled {
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo img {
  height: 48px;
  transition: transform var(--transition);
}

.nav-logo:hover img {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  position: relative;
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  font-weight: 700;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

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

.lang-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.lang-heading {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.lang-switcher {
  display: flex;
  align-items: center;
  background: var(--black-elevated);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 3px;
  gap: 2px;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.4rem 0.55rem;
  border-radius: 50px;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  font-family: inherit;
  line-height: 1;
}

.lang-btn:hover {
  color: var(--accent-light);
}

.lang-btn.active {
  background: #ffffff;
  color: var(--black);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  transition: all var(--transition);
}

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.particles-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 0%, var(--black) 70%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  padding: calc(var(--header-h) + 2rem) 0 4rem;
}

.hero-badge {
  display: inline-block;
  padding: 0.4rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  border-color: rgba(249, 196, 58, 0.35);
}

.hero-logo {
  width: min(280px, 60vw);
  margin: 0 auto 2.5rem;
  filter: drop-shadow(0 0 30px rgba(249, 196, 58, 0.2));
  animation: heroLogoFloat 6s ease-in-out infinite;
}

@keyframes heroLogoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hero-title {
  font-family: var(--font-main);
  font-size: clamp(1.8rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.hero-title span {
  display: block;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  font-weight: 400;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 2.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 2rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-radius: 2px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: #ffffff;
  color: var(--black);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.btn-primary:hover::before {
  transform: translateX(100%);
}

.btn-primary:hover {
  box-shadow: 0 0 30px var(--accent-glow);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-full { width: 100%; }

.hero-scroll {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  animation: fadeInUp 1s ease 1s both;
}

.scroll-indicator {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.6); opacity: 0.5; }
}

/* ========== Stats ========== */
.stats {
  position: relative;
  z-index: 4;
  margin-top: -60px;
  padding-bottom: 4rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.stat-item {
  background: var(--black-card);
  padding: 2.5rem 1.5rem;
  text-align: center;
  transition: background var(--transition);
}

.stat-item:hover {
  background: var(--black-elevated);
}

.stat-number {
  font-family: var(--font-main);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--accent);
  display: inline;
}

.stat-suffix {
  font-family: var(--font-main);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--gold);
}

.stat-label {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ========== Sections ========== */
.section {
  padding: 6rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-main);
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.3;
  max-width: 700px;
  margin: 0 auto;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-desc {
  color: var(--text-muted);
  margin-top: 1rem;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== Reveal Animations ========== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ========== About ========== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 3rem;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 1.05rem;
  font-weight: 400;
}

.about-text p:first-child {
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 400;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-dot {
  position: absolute;
  left: -2rem;
  top: 0.3rem;
  width: 9px;
  height: 9px;
  background: var(--gold);
  border-radius: 50%;
  transform: translateX(-4px);
  box-shadow: 0 0 10px var(--accent-glow);
}

.timeline-year {
  font-family: var(--font-main);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--gold);
  display: block;
  margin-bottom: 0.3rem;
}

.timeline-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Media Placeholder */
.media-placeholder,
.gallery-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: var(--black-card);
  border: 2px dashed var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  text-align: center;
  transition: border-color var(--transition);
}

.media-placeholder:hover,
.gallery-item:hover .gallery-placeholder {
  border-color: var(--border-hover);
}

.media-placeholder {
  min-height: 300px;
  padding: 3rem;
}

.about-photo-wrap {
  margin-top: 1rem;
  border-radius: 4px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.about-photo {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

.about-photo-wrap:hover .about-photo {
  transform: scale(1.02);
}

.placeholder-icon svg,
.gallery-placeholder svg {
  width: 48px;
  height: 48px;
  color: var(--gold-dark);
  opacity: 0.6;
}

.placeholder-hint {
  font-size: 0.75rem;
  color: var(--gold-dark);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ========== Services ========== */
.services {
  background: var(--black-soft);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  background: var(--black-card);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  border-radius: 4px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gold-gradient);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.service-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-card-wide {
  grid-column: span 3;
  display: flex;
  align-items: center;
  gap: 2rem;
}

.service-card-wide .service-icon {
  margin-bottom: 0;
  flex-shrink: 0;
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.5rem;
  color: var(--gold);
}

.service-icon svg {
  width: 100%;
  height: 100%;
}

.service-card h3 {
  font-family: var(--font-main);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--white);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 400;
}

/* ========== Differential ========== */
.differential-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.differential-lead {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin: 1.5rem 0 2rem;
  font-style: italic;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.differential-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  transition: color var(--transition), padding-left var(--transition);
}

.differential-list li:hover {
  color: var(--white);
  padding-left: 0.5rem;
}

.list-icon {
  color: var(--gold);
  font-size: 0.6rem;
  margin-top: 0.5rem;
  flex-shrink: 0;
}

.differential-footer {
  margin-top: 2rem;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 1.5rem;
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
}

/* Orbit Visual */
.orbit-container {
  position: relative;
  width: 400px;
  height: 400px;
  margin: 0 auto;
}

.orbit-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--black-card);
  border: 2px solid var(--gold-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  box-shadow: 0 0 30px var(--gold-glow);
}

.orbit-center img {
  width: 60px;
}

.orbit-ring {
  position: absolute;
  inset: 20px;
  border: 1px dashed var(--border);
  border-radius: 50%;
  animation: orbitSpin 24s linear infinite;
}

.orbit-track {
  position: absolute;
  inset: 0;
  animation: orbitSpin 24s linear infinite;
}

.orbit-item {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 90px;
  margin-left: -45px;
  margin-top: -12px;
  text-align: center;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--gold);
  transform: rotate(calc(var(--i) * 60deg)) translateY(-170px);
  animation: orbitItemFloat 3s ease-in-out infinite;
  animation-delay: calc(var(--i) * 0.4s);
}

.orbit-item span {
  display: inline-block;
  padding: 0.35rem 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--border);
  border-radius: 2px;
  animation: orbitTextUpright 24s linear infinite;
}

@keyframes orbitSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes orbitTextUpright {
  from { transform: rotate(calc(var(--i) * -60deg)); }
  to { transform: rotate(calc(var(--i) * -60deg - 360deg)); }
}

@keyframes orbitItemFloat {
  0%, 100% { opacity: 0.75; }
  50% { opacity: 1; }
}

/* ========== Mission ========== */
.mission {
  position: relative;
  overflow: hidden;
  text-align: center;
}

.mission-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(249, 196, 58, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 50%, rgba(249, 196, 58, 0.04) 0%, transparent 50%);
}

.mission-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.mission-quote {
  font-family: Baskerville, 'Libre Baskerville', 'Times New Roman', Times, serif;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 700;
  line-height: 1.6;
  color: var(--white);
  margin: 2rem 0;
  position: relative;
  padding: 0 2rem;
}

body.lang-zh .mission-quote {
  font-family: var(--font-cn), Baskerville, 'Libre Baskerville', 'Times New Roman', Times, serif;
}

.mission-quote::before,
.mission-quote::after {
  content: '"';
  font-family: Baskerville, 'Libre Baskerville', 'Times New Roman', Times, serif;
  font-size: 4rem;
  color: var(--accent-dark);
  position: absolute;
  line-height: 1;
}

.mission-quote::before { top: -1rem; left: 0; }
.mission-quote::after { bottom: -2rem; right: 0; }

.mission-tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 700;
  margin-top: 2rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ========== Gallery ========== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 250px);
  gap: 1rem;
}

.gallery-item[data-index="0"] { grid-area: 1 / 1 / 2 / 2; }
.gallery-item[data-index="1"] { grid-area: 1 / 2 / 3 / 3; }
.gallery-item[data-index="2"] { grid-area: 1 / 3 / 2 / 4; }
.gallery-item[data-index="3"] { grid-area: 2 / 1 / 3 / 2; }
.gallery-item[data-index="4"] { grid-area: 3 / 1 / 4 / 3; }
.gallery-item[data-index="5"] { grid-area: 3 / 3 / 4 / 4; }

.gallery-item {
  position: relative;
  border-radius: 4px;
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
  height: 100%;
  min-height: 0;
}

.gallery-img {
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

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

.gallery-item:hover {
  transform: scale(1.02);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

.gallery-item-tall {
  grid-row: span 2;
}

.gallery-item-wide {
  grid-column: span 2;
}

.gallery-placeholder {
  width: 100%;
  height: 100%;
  min-height: 250px;
  padding: 2rem;
}

.gallery-placeholder span {
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

.gallery-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.gallery-overlay span {
  color: var(--gold-light);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  border: 1px solid var(--gold);
  padding: 0.5rem 1.5rem;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

/* ========== Contact ========== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact-info p {
  color: var(--text-muted);
  margin: 1rem 0 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.contact-item:hover {
  color: var(--white);
}

.contact-item svg {
  width: 20px;
  height: 20px;
  color: var(--gold);
  flex-shrink: 0;
}

/* Form */
.contact-form {
  background: var(--black-card);
  border: 1px solid var(--border);
  padding: 2.5rem;
  border-radius: 4px;
}

.form-group {
  position: relative;
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--black-elevated);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 1rem;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
}

.form-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  pointer-events: none;
  transition: all 0.3s;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
  top: -0.6rem;
  left: 0.75rem;
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--black-card);
  padding: 0 0.4rem;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  margin-top: 1rem;
  padding: 1rem;
  background: var(--accent-soft);
  border: 1px solid var(--accent-dark);
  color: var(--accent-light);
  text-align: center;
  border-radius: 2px;
  animation: fadeInUp 0.5s ease;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== Footer ========== */
.footer {
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  text-align: center;
}

.footer-logo {
  width: 120px;
  margin: 0 auto 1.5rem;
  opacity: 0.8;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.footer-links a {
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--black-card);
  border: 1px solid var(--border);
  color: var(--gold);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 900;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  border-color: var(--gold);
  box-shadow: 0 0 20px var(--gold-glow);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ========== Lightbox ========== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0, 0, 0, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
}

.lightbox[hidden] {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  background: none;
  border: none;
  color: var(--gold);
  font-size: 2rem;
  cursor: pointer;
  z-index: 2;
  transition: transform var(--transition);
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-close { top: 1rem; right: 1.5rem; font-size: 2.5rem; }
.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  transform: scale(1.2);
}

.lightbox-content {
  max-width: 80vw;
  max-height: 80vh;
}

.lightbox-placeholder {
  min-width: 500px;
  min-height: 400px;
  padding: 3rem;
}

.lightbox-placeholder svg {
  width: 80px;
  height: 80px;
}

#lightbox-caption {
  margin-top: 1rem;
  color: var(--gold-light);
  font-size: 1rem;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .service-card-wide {
    grid-column: span 2;
  }

  .differential-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .orbit-container {
    width: 320px;
    height: 320px;
  }

  .orbit-item {
    transform: rotate(calc(var(--i) * 60deg)) translateY(-140px);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-toggle {
    display: flex;
  }

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

  .services-grid {
    grid-template-columns: 1fr;
  }

  .service-card-wide {
    grid-column: span 1;
    flex-direction: column;
    text-align: center;
  }

  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }

  .gallery-item[data-index] {
    grid-area: auto;
  }

  .gallery-item-tall {
    grid-row: span 1;
  }

  .gallery-item-wide {
    grid-column: span 2;
  }

  .lightbox-placeholder {
    min-width: auto;
    min-height: 300px;
    width: 90vw;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .gallery-item[data-index] {
    grid-area: auto;
    min-height: 220px;
  }

  .gallery-item-wide {
    grid-column: span 1;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }
}