/* ========================================
   WEEX Website - Main Stylesheet
   顶级高效的数字资产交易平台
   ======================================== */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0a0f1a;
  --bg-secondary: #0f1625;
  --bg-card: #141d2e;
  --bg-card-hover: #1a2540;
  --text-primary: #ffffff;
  --text-secondary: #b0b8c8;
  --text-muted: #6b7388;
  --accent-blue: #0078ff;
  --accent-blue-light: #4da6ff;
  --gradient-main: linear-gradient(135deg, #0066ff, #7000ff);
  --gradient-hero: linear-gradient(135deg, #0a0f1a 0%, #0d1a35 50%, #0f0f25 100%);
  --gradient-card: linear-gradient(145deg, #141d2e, #1a2540);
  --border-color: #1e2d4a;
  --border-light: #2a3a5c;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(0,120,255,0.3);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
  --transition-slow: 0.5s ease;
  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-blue-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--accent-blue); }

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

ul { list-style: none; }

/* --- Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 50px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0,102,255,0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0,102,255,0.6);
}

.btn-outline {
  background: transparent;
  color: var(--accent-blue-light);
  border: 2px solid var(--accent-blue);
}
.btn-outline:hover {
  background: rgba(0,120,255,0.1);
  border-color: var(--accent-blue-light);
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.1rem;
  border-radius: var(--radius-lg);
}

/* --- Header & Navigation --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: rgba(10,15,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: background var(--transition);
}

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

.brand {
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 2px;
}

nav ul {
  display: flex;
  gap: 32px;
}

nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: width var(--transition);
}
nav a:hover::after,
nav a.active::after { width: 100%; }
nav a:hover, nav a.active { color: var(--text-primary); }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text-primary);
  font-size: 1.5rem;
}

/* --- Hero Section --- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  padding: calc(var(--header-height) + 40px) 0 80px;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,102,255,0.15), transparent 70%);
  pointer-events: none;
}

#hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(112,0,255,0.1), transparent 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-content h1 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 32px;
}

.hero-stats .stat-item {
  text-align: center;
}

.hero-stats .stat-number {
  font-size: 2rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stats .stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 0 60px rgba(0,120,255,0.15);
}

.hero-badge {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: var(--shadow-md);
  font-size: 0.9rem;
}

.hero-badge.top-right { top: 20px; right: -30px; }
.hero-badge.bottom-left { bottom: 30px; left: -40px; }

.hero-badge .badge-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #00ff88;
  animation: pulse 2s infinite;
}

/* --- Features Section --- */
#features {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.features-grid article {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.features-grid article::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-main);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.features-grid article:hover {
  transform: translateY(-8px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.features-grid article:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0,120,255,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 20px;
  transition: all var(--transition);
}

.features-grid article:hover .feature-icon {
  background: rgba(0,120,255,0.25);
  box-shadow: 0 0 20px rgba(0,120,255,0.2);
}

.features-grid h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.features-grid p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Platform Data Section --- */
#platform-data {
  padding: 100px 0;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.data-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  text-align: center;
  transition: all var(--transition);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.data-number {
  font-size: 2.8rem;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.data-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Services Section --- */
#services {
  padding: 100px 0;
  background: var(--bg-secondary);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px 30px;
  text-align: center;
  transition: all var(--transition-slow);
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.service-card .service-icon {
  font-size: 2.5rem;
  margin-bottom: 18px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.service-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* --- CTA Section --- */
#cta {
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

#cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,102,255,0.12), transparent 70%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-content p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 36px;
}

/* --- Footer --- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .brand { font-size: 1.6rem; margin-bottom: 12px; }
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; }

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: var(--text-muted); font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--accent-blue-light); }

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* --- About Page --- */
.about-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  text-align: center;
  background: var(--gradient-hero);
}

.about-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.about-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto;
}

.about-content {
  padding: 80px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1rem;
}

.timeline {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.timeline-list {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline-list::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-main);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 50px;
  position: relative;
}

.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 8px;
  transform: translateX(-50%);
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gradient-main);
  box-shadow: 0 0 15px rgba(0,120,255,0.5);
  z-index: 1;
}

.timeline-content {
  width: 42%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.timeline-content h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.timeline-content .timeline-date {
  color: var(--accent-blue-light);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 80px 0;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 20px;
  text-align: center;
  transition: all var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.team-card img {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid var(--accent-blue);
}

.team-card h3 { font-size: 1.1rem; font-weight: 700; }
.team-card .role { color: var(--accent-blue-light); font-size: 0.85rem; margin-bottom: 8px; }
.team-card p { color: var(--text-muted); font-size: 0.85rem; }

/* --- Services Page --- */
.services-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  text-align: center;
  background: var(--gradient-hero);
}

.services-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.services-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 700px;
  margin: 0 auto;
}

.services-detail {
  padding: 80px 0;
}

.service-detail-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

.service-detail-item:nth-child(even) { direction: rtl; }
.service-detail-item:nth-child(even) .service-detail-text { direction: ltr; }

.service-detail-item:last-child { margin-bottom: 0; }

.service-detail-text h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-detail-text p {
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.service-feature-list {
  margin-top: 20px;
}

.service-feature-list li {
  color: var(--text-secondary);
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.service-feature-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-blue);
}

.service-detail-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* --- FAQ Page --- */
.faq-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  text-align: center;
  background: var(--gradient-hero);
}

.faq-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.faq-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
}

.faq-content {
  padding: 80px 0;
}

.faq-category {
  margin-bottom: 50px;
}

.faq-category h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-light);
}

details {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  transition: all var(--transition);
}

details:hover {
  border-color: var(--accent-blue);
}

details[open] {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

summary {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  transition: color var(--transition);
}

summary:hover { color: var(--accent-blue-light); }

summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--accent-blue);
  transition: transform var(--transition);
}

details[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

details .faq-answer {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

/* --- Contact Page --- */
.contact-hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  text-align: center;
  background: var(--gradient-hero);
}

.contact-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.contact-hero p {
  color: var(--text-secondary);
  font-size: 1.15rem;
}

.contact-content {
  padding: 80px 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.contact-form h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(0,120,255,0.15);
}

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

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

.contact-info-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
}

.contact-info-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: 16px;
  margin-top: 12px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.social-links a:hover {
  background: var(--gradient-main);
  border-color: transparent;
  color: #fff;
  transform: translateY(-3px);
}

.business-offices {
  padding: 80px 0;
  background: var(--bg-secondary);
}

.offices-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.office-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all var(--transition);
}

.office-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.office-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; }
.office-card p { color: var(--text-secondary); font-size: 0.9rem; }

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

.fade-in-scale {
  animation: fadeInScale 0.5s ease forwards;
}

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

@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content h1 { font-size: 2.2rem; }
  .hero-content { text-align: center; }
  .hero-content p { max-width: 100%; }
  .hero-buttons { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-badge { display: none; }
  .hero-image { max-width: 400px; margin: 0 auto; }

  .menu-toggle { display: block; }
  nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: rgba(10,15,26,0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 20px;
    transform: translateY(-100%);
    opacity: 0;
    transition: all var(--transition);
    pointer-events: none;
  }
  nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  nav ul { flex-direction: column; gap: 18px; }

  .features-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .data-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .service-detail-item { grid-template-columns: 1fr; }
  .service-detail-item:nth-child(even) { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr; }
  .offices-grid { grid-template-columns: 1fr; }

  .timeline-list::before { left: 20px; }
  .timeline-item { flex-direction: row !important; padding-left: 50px; }
  .timeline-dot { left: 20px !important; }
  .timeline-content { width: 100%; }

  .section-title { font-size: 1.7rem; }
  .about-hero h1, .services-hero h1, .faq-hero h1, .contact-hero h1 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .hero-stats { flex-wrap: wrap; gap: 20px; }
  .data-grid { grid-template-columns: 1fr; }
  .btn-lg { padding: 14px 28px; font-size: 1rem; }
}