/* ============================================================
   GateAPP | 权威数字资产交易平台 - 主样式表
   配色: 深色(#0d1117) + Gate青绿(#17c3b2) + 权威金(#f59e0b) + 核验蓝(#2563eb) + 白
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-card: #1c2333;
  --bg-card-hover: #212a3b;
  --border-color: #30363d;
  --border-light: #21262d;
  
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  
  --gate-cyan: #17c3b2;
  --gate-cyan-hover: #1dd4c0;
  --gate-cyan-dark: #0e8a7e;
  --gate-cyan-glow: rgba(23, 195, 178, 0.25);
  
  --gold: #f59e0b;
  --gold-hover: #fbbf24;
  --gold-dark: #b45309;
  --gold-glow: rgba(245, 158, 11, 0.25);
  
  --verify-blue: #2563eb;
  --verify-blue-hover: #3b82f6;
  --verify-blue-dark: #1d4ed8;
  
  --white: #ffffff;
  --danger: #ef4444;
  --success: #22c55e;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 20px rgba(23, 195, 178, 0.3);
  
  --transition-fast: 0.2s ease;
  --transition-normal: 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", "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--gate-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--gate-cyan-hover);
}

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

ul, ol { list-style: none; }

/* --- Utility --- */
.container {
  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;
  color: var(--white);
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.05rem;
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* --- Header / Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  height: var(--header-height);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--bg-primary);
  font-weight: 900;
}

.main-nav {
  display: flex;
  gap: 4px;
}

.main-nav a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--gate-cyan);
  background: var(--gate-cyan-glow);
}

.nav-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--gate-cyan), var(--gate-cyan-dark));
  color: var(--white) !important;
  border-radius: 24px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.nav-download-btn:hover {
  background: linear-gradient(135deg, var(--gate-cyan-hover), var(--gate-cyan));
  box-shadow: 0 0 20px var(--gate-cyan-glow);
  transform: translateY(-1px);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
}

/* --- Hero Section --- */
.hero {
  padding: calc(var(--header-height) + 60px) 0 60px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--gate-cyan-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlowPulse 4s ease-in-out infinite;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
  pointer-events: none;
  animation: heroGlowPulse 5s ease-in-out 1s infinite;
}

@keyframes heroGlowPulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.1); }
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--white);
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.7;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.hero-tags span:hover {
  border-color: var(--gate-cyan);
  color: var(--gate-cyan);
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-height: 420px;
  object-fit: cover;
}

.hero-image::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: calc(var(--radius-lg) + 4px);
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold), var(--verify-blue));
  z-index: -1;
  opacity: 0.4;
  filter: blur(8px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 24px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gate-cyan), var(--gate-cyan-dark));
  color: var(--white);
  box-shadow: 0 4px 15px var(--gate-cyan-glow);
  animation: btnPulse 2.5s ease-in-out infinite;
}

.btn-primary:hover {
  box-shadow: 0 6px 25px var(--gate-cyan-glow);
  transform: translateY(-2px);
  color: var(--white);
}

@keyframes btnPulse {
  0%, 100% { box-shadow: 0 4px 15px var(--gate-cyan-glow); }
  50% { box-shadow: 0 4px 30px rgba(23, 195, 178, 0.5); }
}

.btn-gold {
  background: linear-gradient(135deg, var(--gold), var(--gold-dark));
  color: var(--bg-primary);
  font-weight: 700;
}

.btn-gold:hover {
  box-shadow: 0 6px 25px var(--gold-glow);
  transform: translateY(-2px);
  color: var(--bg-primary);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--gate-cyan);
  color: var(--gate-cyan);
}

.btn-outline:hover {
  background: var(--gate-cyan);
  color: var(--bg-primary);
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
  border-radius: 30px;
}

/* --- Features Section --- */
.features {
  padding: 80px 0;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gate-cyan), var(--gold), var(--verify-blue));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

.feature-card:hover {
  border-color: var(--gate-cyan);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4), 0 0 0 1px var(--gate-cyan-glow);
  transform: translateY(-4px);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.feature-icon.cyan { background: var(--gate-cyan-glow); color: var(--gate-cyan); }
.feature-icon.gold { background: var(--gold-glow); color: var(--gold); }
.feature-icon.blue { background: rgba(37, 99, 235, 0.2); color: var(--verify-blue); }

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--white);
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* --- APP Showcase --- */
.app-showcase {
  padding: 80px 0;
  background: var(--bg-secondary);
}

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

.app-showcase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  transition: all var(--transition-normal);
}

.app-showcase-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.app-showcase-card img {
  border-radius: var(--radius-md);
  margin: 0 auto 20px;
  max-height: 200px;
  object-fit: cover;
}

.app-showcase-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
  color: var(--white);
}

.app-showcase-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

/* --- CTA Section --- */
.cta-section {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(23,195,178,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-card {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-xl);
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-card h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--white);
}

.cta-card p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Page Header (Inner Pages) --- */
.page-header {
  padding: calc(var(--header-height) + 48px) 0 40px;
  text-align: center;
  position: relative;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-top: 10px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Content Section --- */
.content-section {
  padding: 40px 0 80px;
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.content-grid img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.content-text h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--white);
}

.content-text p {
  font-size: 0.98rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
  line-height: 1.8;
}

/* --- Timeline --- */
.timeline {
  position: relative;
  padding: 20px 0;
  max-width: 700px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--gate-cyan), var(--gold), var(--verify-blue));
}

.timeline-item {
  position: relative;
  padding-left: 48px;
  margin-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 13px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--gate-cyan);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--gate-cyan-glow);
}

.timeline-item h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--gate-cyan);
  margin-bottom: 4px;
}

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

/* --- Security Cards --- */
.security-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

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

.security-card:hover {
  border-color: var(--verify-blue);
  box-shadow: 0 4px 20px rgba(37,99,235,0.15);
}

.security-card h4 {
  font-size: 1.05rem;
  color: var(--verify-blue);
  margin-bottom: 8px;
}

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

/* --- Team Grid --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  transition: all var(--transition-normal);
}

.team-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
}

.team-card img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 12px;
  object-fit: cover;
  border: 3px solid var(--border-color);
}

.team-card h4 {
  font-size: 1rem;
  color: var(--white);
  margin-bottom: 4px;
}

.team-card .role {
  font-size: 0.85rem;
  color: var(--gold);
  margin-bottom: 8px;
}

.team-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --- Services Grid --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: all var(--transition-normal);
}

.service-card:hover {
  border-color: var(--gate-cyan);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4);
  transform: translateY(-4px);
}

.service-card .service-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--white);
}

.service-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.service-card ul {
  list-style: disc;
  padding-left: 18px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.service-card ul li {
  margin-bottom: 4px;
}

/* --- Service Table --- */
.service-table-wrapper {
  overflow-x: auto;
  margin-top: 48px;
}

.service-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.service-table th,
.service-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.92rem;
}

.service-table th {
  background: var(--bg-secondary);
  color: var(--gate-cyan);
  font-weight: 700;
  white-space: nowrap;
}

.service-table td {
  color: var(--text-secondary);
}

.service-table tr:hover td {
  background: rgba(23, 195, 178, 0.03);
}

/* --- FAQ --- */
.faq-search {
  max-width: 500px;
  margin: 0 auto 36px;
}

.faq-search input {
  width: 100%;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.faq-search input:focus {
  border-color: var(--gate-cyan);
  box-shadow: 0 0 0 3px var(--gate-cyan-glow);
}

.faq-categories {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 32px;
}

.faq-cat-btn {
  padding: 8px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.faq-cat-btn:hover,
.faq-cat-btn.active {
  border-color: var(--gate-cyan);
  background: var(--gate-cyan-glow);
  color: var(--gate-cyan);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-section {
  margin-bottom: 36px;
}

.faq-section h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--gold);
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--gate-cyan);
}

.faq-item summary {
  padding: 18px 20px;
  font-weight: 600;
  cursor: pointer;
  color: var(--white);
  font-size: 0.98rem;
  user-select: none;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  color: var(--gate-cyan);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 20px 18px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px;
}

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

.contact-form label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.contact-form input,
.contact-form select,
.contact-form 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: 0.93rem;
  font-family: inherit;
  transition: border-color var(--transition-fast);
  outline: none;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--gate-cyan);
  box-shadow: 0 0 0 3px var(--gate-cyan-glow);
}

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

.contact-form button {
  width: 100%;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.contact-info-card:hover {
  border-color: var(--gold);
}

.contact-info-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--gold);
}

.contact-info-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.social-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.social-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  border-color: var(--gate-cyan);
  color: var(--gate-cyan);
}

/* --- Data Stats --- */
.stats-row {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding: 40px 0;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gate-cyan), var(--gold));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* --- Footer --- */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 40px 0;
  text-align: center;
}

.site-footer p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.site-footer .footer-nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.site-footer .footer-nav a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.site-footer .footer-nav a:hover {
  color: var(--gate-cyan);
}

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.7s ease forwards;
}

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .features-grid,
  .services-grid,
  .security-grid { grid-template-columns: repeat(2, 1fr); }
  
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  
  .hero .container { grid-template-columns: 1fr; }
  
  .hero-content h1 { font-size: 2.2rem; }
  
  .app-showcase-grid { grid-template-columns: repeat(2, 1fr); }
  
  .content-grid { grid-template-columns: 1fr; }
  
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .features-grid,
  .services-grid,
  .security-grid,
  .app-showcase-grid { grid-template-columns: 1fr; }
  
  .team-grid { grid-template-columns: 1fr; }
  
  .stats-row { gap: 24px; }
  
  .stat-number { font-size: 1.8rem; }
  
  .hero-content h1 { font-size: 1.8rem; }
  
  .section-title { font-size: 1.6rem; }
  
  .page-header h1 { font-size: 1.8rem; }
  
  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
  }
  
  .main-nav.open { display: flex; }
  
  .mobile-menu-toggle { display: block; }
  
  .cta-card { padding: 36px 24px; }
  
  .cta-card h2 { font-size: 1.5rem; }
  
  .hero { padding-top: calc(var(--header-height) + 30px); }
}

@media (max-width: 480px) {
  .container { padding: 0 14px; }
  
  .hero-content h1 { font-size: 1.5rem; }
  
  .hero-tags span { font-size: 0.78rem; padding: 4px 10px; }
  
  .btn { padding: 10px 20px; font-size: 0.88rem; }
  
  .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
}