/* ========== CSS Variables & Reset ========== */
:root {
  --tg-blue: #0088cc;
  --tg-blue-dark: #006699;
  --tg-blue-light: #e6f4fa;
  --accent-green: #34b7f1;
  --bg-dark: #0f1419;
  --bg-card: #ffffff;
  --bg-gray: #f5f7fa;
  --bg-dark-card: #1a2332;
  --text-primary: #1a1a1a;
  --text-secondary: #5a5a5a;
  --text-light: #8a8a8a;
  --text-white: #ffffff;
  --border-color: #e4e8ec;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 50px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --max-width: 1200px;
  --header-height: 64px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--text-primary);
  line-height: 1.6;
  background: var(--bg-gray);
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

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

/* ========== Animations ========== */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

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

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

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

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-fadeInUp {
  animation: fadeInUp 0.8s ease-out forwards;
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out forwards;
}

/* ========== Header & Navigation ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: box-shadow 0.3s;
}

.header.scrolled {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--tg-blue);
}

.logo svg {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
  position: relative;
}

.nav-item:hover {
  color: var(--tg-blue);
  background: var(--tg-blue-light);
}

.nav-item.active {
  color: var(--tg-blue);
  background: var(--tg-blue-light);
  font-weight: 600;
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--tg-blue);
  border-radius: 2px;
}

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

/* ========== Hero Section ========== */
.hero {
  position: relative;
  padding: 140px 24px 100px;
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 50%, var(--bg-dark) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,136,204,0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(52,183,241,0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  animation: fadeInUp 0.8s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: rgba(0,136,204,0.15);
  border: 1px solid rgba(0,136,204,0.3);
  border-radius: 20px;
  color: var(--accent-green);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero-title span {
  color: var(--accent-green);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 500px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--tg-blue);
  color: white;
  box-shadow: 0 4px 20px rgba(0,136,204,0.35);
}

.btn-primary:hover {
  background: var(--tg-blue-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(0,136,204,0.45);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  transform: translateY(-2px);
}

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

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: float 6s ease-in-out infinite;
}

.hero-visual svg {
  width: 100%;
  max-width: 420px;
  height: auto;
}

/* ========== Section Common ========== */
.section {
  padding: 80px 24px;
}

.section-alt {
  background: white;
}

.section-dark {
  background: var(--bg-dark);
  color: white;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 60px;
}

.section-label {
  display: inline-block;
  padding: 4px 14px;
  background: var(--tg-blue-light);
  color: var(--tg-blue);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.section-dark .section-desc {
  color: rgba(255,255,255,0.7);
}

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

.feature-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--tg-blue), var(--accent-green));
  transform: scaleX(0);
  transition: transform 0.3s;
}

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

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: var(--tg-blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: var(--tg-blue);
}

.feature-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== Platform Downloads ========== */
.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.platform-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: var(--tg-blue);
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--tg-blue-light);
  border-radius: 50%;
}

.platform-icon svg {
  width: 32px;
  height: 32px;
  color: var(--tg-blue);
}

.platform-name {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.platform-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.platform-btn {
  width: 100%;
  padding: 12px;
  font-size: 0.9rem;
}

/* ========== Rich Content Section ========== */
.rich-content {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

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

.content-block.reverse {
  direction: rtl;
}

.content-block.reverse > * {
  direction: ltr;
}

.content-visual {
  background: linear-gradient(135deg, var(--tg-blue-light), #f0f8ff);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 320px;
}

.content-visual svg {
  width: 100%;
  max-width: 280px;
  height: auto;
}

.content-text h3 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.3;
}

.content-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}

.content-list {
  margin-top: 16px;
}

.content-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.content-list li svg {
  width: 20px;
  height: 20px;
  color: var(--tg-blue);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ========== Testimonials ========== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-dark-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}

.testimonial-card:hover {
  border-color: rgba(0,136,204,0.3);
  transform: translateY(-3px);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--tg-blue), var(--accent-green));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.testimonial-meta {
  flex: 1;
}

.testimonial-name {
  font-weight: 600;
  color: white;
  font-size: 0.95rem;
}

.testimonial-role {
  font-size: 0.8rem;
  color: var(--text-light);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
}

.testimonial-stars svg {
  width: 16px;
  height: 16px;
  color: #ffc107;
}

.testimonial-text {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.7;
}

/* ========== Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}

.stat-item:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(0,136,204,0.3);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--accent-green);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.6);
}

/* ========== Comparison Table ========== */
.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  font-size: 0.95rem;
}

.compare-table th {
  background: var(--bg-dark);
  color: white;
  padding: 16px 20px;
  text-align: left;
  font-weight: 600;
}

.compare-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
}

.compare-table tr:last-child td {
  border-bottom: none;
}

.compare-table tr:nth-child(even) {
  background: var(--bg-gray);
}

.compare-table td:first-child {
  font-weight: 600;
}

.compare-check {
  color: #28a745;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.compare-cross {
  color: #dc3545;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.compare-check svg, .compare-cross svg {
  width: 18px;
  height: 18px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: white;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.3s;
}

.faq-item:hover {
  border-color: var(--tg-blue);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  background: none;
  border: none;
  text-align: left;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}

.faq-question:hover {
  color: var(--tg-blue);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--tg-blue);
  transition: transform 0.3s;
  flex-shrink: 0;
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-out;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

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

/* ========== Download Page Specific ========== */
.download-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 100%);
  padding: 140px 24px 80px;
  text-align: center;
}

.download-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.download-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.7);
  max-width: 600px;
  margin: 0 auto 40px;
}

.main-download {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  max-width: 560px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
  text-align: left;
}

.main-download-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.main-download-icon {
  width: 72px;
  height: 72px;
  background: var(--tg-blue-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-download-icon svg {
  width: 40px;
  height: 40px;
  color: var(--tg-blue);
}

.main-download-info h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.main-download-meta {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.main-download-btn {
  width: 100%;
  margin-bottom: 12px;
}

.main-download-note {
  font-size: 0.85rem;
  color: var(--text-light);
  text-align: center;
}

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

.download-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-color);
  transition: all 0.3s;
}

.download-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--tg-blue);
}

.download-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.download-card-icon {
  width: 52px;
  height: 52px;
  background: var(--tg-blue-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-card-icon svg {
  width: 28px;
  height: 28px;
  color: var(--tg-blue);
}

.download-card-title {
  font-size: 1.2rem;
  font-weight: 700;
}

.download-card-version {
  font-size: 0.85rem;
  color: var(--text-light);
}

.download-card-btn {
  width: 100%;
  margin-bottom: 16px;
}

.download-card-steps {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.download-card-steps ol {
  list-style: decimal;
  padding-left: 18px;
}

.download-card-steps li {
  margin-bottom: 6px;
}

/* Install Guide */
.guide-section {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 40px;
}

.guide-section h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.guide-section h3 svg {
  width: 28px;
  height: 28px;
  color: var(--tg-blue);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.guide-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--tg-blue);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* System Requirements */
.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sysreq-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border-color);
}

.sysreq-card h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sysreq-card h4 svg {
  width: 22px;
  height: 22px;
  color: var(--tg-blue);
}

.sysreq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sysreq-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-color);
}

.sysreq-item:last-child {
  border-bottom: none;
}

.sysreq-item span:first-child {
  color: var(--text-secondary);
}

.sysreq-item span:last-child {
  font-weight: 600;
}

/* Changelog */
.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.changelog-item {
  background: white;
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--tg-blue);
}

.changelog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.changelog-version {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--tg-blue);
}

.changelog-date {
  font-size: 0.85rem;
  color: var(--text-light);
}

.changelog-changes {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.changelog-changes li {
  list-style: disc;
  margin-left: 18px;
  margin-bottom: 4px;
}

/* ========== SEO Page Specific ========== */
.seo-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a3a 100%);
  padding: 140px 24px 80px;
}

.seo-hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.seo-hero-content h1 {
  font-size: 2.6rem;
  font-weight: 800;
  color: white;
  line-height: 1.2;
  margin-bottom: 20px;
}

.seo-hero-content p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  margin-bottom: 32px;
}

.seo-article {
  background: white;
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-bottom: 24px;
}

.seo-article h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--tg-blue-light);
}

.seo-article p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.9;
  margin-bottom: 16px;
}

.seo-article strong {
  color: var(--text-primary);
}

.seo-article ul {
  padding-left: 20px;
}

.seo-article ul li {
  list-style: disc;
  margin-bottom: 10px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.seo-cta-box {
  background: linear-gradient(135deg, var(--tg-blue), var(--tg-blue-dark));
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  color: white;
}

.seo-cta-box h3 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.seo-cta-box p {
  font-size: 1rem;
  opacity: 0.9;
  margin-bottom: 24px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.seo-cta-box .btn {
  background: white;
  color: var(--tg-blue);
  font-size: 1.1rem;
  padding: 16px 40px;
}

.seo-cta-box .btn:hover {
  background: var(--bg-gray);
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark);
  padding: 48px 24px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(40,167,69,0.15);
  border: 1px solid rgba(40,167,69,0.3);
  border-radius: var(--radius-sm);
  color: #28a745;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 20px;
}

.footer-badge svg {
  width: 18px;
  height: 18px;
}

.footer-copy {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
}

/* ========== Scroll Reveal ========== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .platforms-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .content-block { grid-template-columns: 1fr; }
  .content-block.reverse { direction: ltr; }
  .download-cards-grid { grid-template-columns: repeat(2, 1fr); }
  .sysreq-grid { grid-template-columns: 1fr; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-buttons { justify-content: center; }
  .seo-hero-inner { grid-template-columns: 1fr; text-align: center; }
}

@media (max-width: 640px) {
  .hero-title { font-size: 2.2rem; }
  .section-title { font-size: 1.8rem; }
  .features-grid { grid-template-columns: 1fr; }
  .platforms-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .download-cards-grid { grid-template-columns: 1fr; }
  .nav { display: none; position: absolute; top: var(--header-height); left: 0; right: 0; background: white; flex-direction: column; padding: 16px; box-shadow: var(--shadow-md); }
  .nav.open { display: flex; }
  .menu-toggle { display: block; }
  .section { padding: 60px 16px; }
  .hero { padding: 120px 16px 80px; }
  .guide-step { flex-direction: column; gap: 12px; }
}

/* ========== Utility ========== */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }