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

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

:root {
  --primary: #FF6A00;
  --primary-dark: #E55F00;
  --primary-light: #FFF3E6;
  --secondary: #1A1A2E;
  --text: #2D2D3A;
  --text-light: #5C5C6D;
  --text-muted: #8A8A9A;
  --bg: #FFFFFF;
  --bg-light: #F8F9FC;
  --bg-warm: #FFF8F2;
  --border: #E8E8F0;
  --border-light: #F0F0F8;
  --success: #10B981;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-light);
  line-height: 1.7;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  background: var(--primary-light);
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

/* ===== NAVIGATION ===== */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--secondary);
}

.nav-brand svg {
  width: 36px;
  height: 36px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--text);
  background: var(--bg-light);
}

.nav-menu a.active {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-menu a svg {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

.nav-menu a.active svg {
  opacity: 1;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

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

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn svg {
  width: 20px;
  height: 20px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,106,0,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,106,0,0.4);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-light);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border-light);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-light);
  color: var(--text);
}

.btn-large {
  padding: 18px 44px;
  font-size: 18px;
  border-radius: var(--radius-lg);
}

/* ===== HERO ===== */
.hero {
  padding: 140px 0 80px;
  background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(255,106,0,0.08) 0%, transparent 70%);
  pointer-events: none;
}

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

.hero-content h1 {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  color: var(--secondary);
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-content h1 span {
  color: var(--primary);
}

.hero-content .hero-subtitle {
  font-size: 20px;
  color: var(--text-light);
  margin-bottom: 32px;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 14px;
  color: var(--text-light);
  box-shadow: var(--shadow-sm);
}

.hero-badge svg {
  width: 16px;
  height: 16px;
  color: var(--success);
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.hero-meta {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-muted);
}

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

.hero-image-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, #FFF3E6 0%, #FFE8D1 50%, #FFD4A8 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-xl);
}

.hero-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 20px;
  background: rgba(255,255,255,0.5);
  border-radius: var(--radius-lg);
  border: 2px dashed rgba(255,106,0,0.2);
}

.hero-image-placeholder svg {
  width: 120px;
  height: 120px;
  color: var(--primary);
  opacity: 0.4;
}

.hero-stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

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

.hero-stat-number {
  font-size: 28px;
  font-weight: 800;
  color: var(--secondary);
}

.hero-stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== FEATURE CARDS ===== */
.features-section {
  padding: 80px 0;
  background: var(--bg);
}

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

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

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  opacity: 0;
  transition: var(--transition);
}

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

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

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

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

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== DOWNLOAD PLATFORMS ===== */
.platforms-section {
  padding: 80px 0;
  background: var(--bg-light);
}

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

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

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.platform-icon {
  width: 64px;
  height: 64px;
  background: var(--bg-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

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

.platform-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.platform-card p {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.6;
}

.platform-card .btn {
  width: 100%;
  padding: 12px 20px;
  font-size: 14px;
}

/* ===== DETAILED FEATURES ===== */
.detail-section {
  padding: 80px 0;
}

.detail-section:nth-child(even) {
  background: var(--bg-light);
}

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

.detail-row.reverse {
  direction: rtl;
}

.detail-row.reverse > * {
  direction: ltr;
}

.detail-image {
  background: linear-gradient(135deg, var(--primary-light) 0%, #FFE8D1 100%);
  border-radius: var(--radius-xl);
  aspect-ratio: 16/10;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.detail-image svg {
  width: 80px;
  height: 80px;
  color: var(--primary);
  opacity: 0.5;
}

.detail-content h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 16px;
}

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

.detail-list {
  list-style: none;
  margin-top: 20px;
}

.detail-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  font-size: 15px;
  color: var(--text);
}

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

/* ===== TESTIMONIALS ===== */
.testimonials-section {
  padding: 80px 0;
  background: var(--bg-warm);
}

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

.testimonial-card {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.testimonial-card:hover {
  box-shadow: var(--shadow);
}

.testimonial-stars {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.testimonial-stars svg {
  width: 18px;
  height: 18px;
  color: #FFB800;
}

.testimonial-stars svg.empty {
  color: var(--border);
}

.testimonial-text {
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  margin-bottom: 20px;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--secondary);
}

.testimonial-role {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== STATS ===== */
.stats-section {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--secondary) 0%, #2D2D4A 100%);
  color: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item {
  padding: 20px 0;
}

.stat-number {
  font-size: 42px;
  font-weight: 900;
  color: var(--primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-top: 8px;
}

/* ===== COMPARISON ===== */
.comparison-section {
  padding: 80px 0;
  background: var(--bg);
}

.comparison-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg);
}

.comparison-table th {
  background: var(--bg-light);
  padding: 18px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--secondary);
  border-bottom: 1px solid var(--border);
}

.comparison-table th:first-child {
  width: 35%;
}

.comparison-table td {
  padding: 18px 24px;
  font-size: 15px;
  color: var(--text);
  border-bottom: 1px solid var(--border-light);
}

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

.comparison-table tr:hover td {
  background: var(--bg-light);
}

.comparison-table .check {
  color: var(--success);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.comparison-table .cross {
  color: #EF4444;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.comparison-table svg {
  width: 20px;
  height: 20px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-light);
}

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

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: #DDDDE8;
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary);
  text-align: left;
  transition: var(--transition);
}

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

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question svg {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== CTA SECTION ===== */
.cta-section {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 18px;
  opacity: 0.9;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.cta-section .btn:hover {
  background: var(--bg-light);
  color: var(--primary-dark);
}

/* ===== FOOTER ===== */
.main-footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.7);
  padding: 40px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-disclaimer {
  text-align: center;
  font-size: 13px;
  line-height: 1.8;
}

.footer-disclaimer a {
  color: var(--primary);
}

/* ===== DOWNLOAD PAGE SPECIFIC ===== */
.download-hero {
  padding: 140px 0 60px;
  background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 100%);
}

.download-hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
}

.download-hero h1 {
  font-size: 44px;
  font-weight: 900;
  color: var(--secondary);
  margin-bottom: 16px;
  line-height: 1.2;
}

.download-hero h1 span {
  color: var(--primary);
}

.download-hero .subtitle {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 32px;
}

.download-main-card {
  background: var(--bg);
  border: 2px solid var(--primary);
  border-radius: var(--radius-xl);
  padding: 40px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.download-main-card .badge-recommended {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 6px 20px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.download-main-card .platform-logo {
  width: 80px;
  height: 80px;
  background: var(--primary-light);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.download-main-card .platform-logo svg {
  width: 40px;
  height: 40px;
  color: var(--primary);
}

.download-main-card h3 {
  font-size: 24px;
  font-weight: 800;
  color: var(--secondary);
  margin-bottom: 8px;
}

.download-meta {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.download-note {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

.download-platforms-section {
  padding: 60px 0;
}

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

.download-platform-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  transition: var(--transition);
}

.download-platform-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.download-platform-card .platform-icon {
  width: 72px;
  height: 72px;
  background: var(--bg-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.download-platform-card .platform-icon svg {
  width: 36px;
  height: 36px;
  color: var(--primary);
}

.download-platform-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 8px;
}

.download-platform-card .version-info {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.install-steps {
  text-align: left;
  margin: 20px 0;
  padding: 16px;
  background: var(--bg-light);
  border-radius: var(--radius);
}

.install-steps ol {
  margin: 0;
  padding-left: 20px;
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ===== INSTALL GUIDE ===== */
.guide-section {
  padding: 60px 0;
  background: var(--bg-light);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

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

.guide-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.guide-card h3 svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.guide-step {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-light);
}

.guide-step:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.step-number {
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 6px;
}

.step-content p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== REQUIREMENTS ===== */
.requirements-section {
  padding: 60px 0;
  background: var(--bg);
}

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

.requirement-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
}

.requirement-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.requirement-card h4 svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.requirement-card ul {
  list-style: none;
  font-size: 14px;
  color: var(--text-light);
  line-height: 2;
}

/* ===== CHANGELOG ===== */
.changelog-section {
  padding: 60px 0;
  background: var(--bg-light);
}

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

.changelog-item {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
}

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

.changelog-version {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
}

.changelog-date {
  font-size: 13px;
  color: var(--text-muted);
}

.changelog-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 12px;
  margin-left: auto;
}

.changelog-badge.latest {
  background: #D1FAE5;
  color: #065F46;
}

.changelog-badge.stable {
  background: var(--primary-light);
  color: var(--primary-dark);
}

.changelog-item ul {
  margin: 0;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.9;
}

/* ===== SECURITY ===== */
.security-section {
  padding: 60px 0;
  background: var(--bg);
}

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

.security-card {
  text-align: center;
  padding: 36px 24px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}

.security-card svg {
  width: 48px;
  height: 48px;
  color: var(--success);
  margin-bottom: 16px;
}

.security-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 10px;
}

.security-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== SEO PAGE SPECIFIC ===== */
.seo-hero {
  padding: 140px 0 60px;
  background: linear-gradient(180deg, var(--bg-warm) 0%, var(--bg) 100%);
}

.seo-hero h1 {
  font-size: 42px;
  font-weight: 900;
  color: var(--secondary);
  text-align: center;
  margin-bottom: 20px;
  line-height: 1.2;
}

.seo-hero h1 span {
  color: var(--primary);
}

.seo-hero .lead {
  font-size: 18px;
  color: var(--text-light);
  text-align: center;
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

.seo-content {
  padding: 60px 0;
}

.seo-article {
  max-width: 800px;
  margin: 0 auto;
}

.seo-article h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--secondary);
  margin: 48px 0 20px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.seo-article h2:first-child {
  margin-top: 0;
}

.seo-article h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--secondary);
  margin: 32px 0 14px;
}

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

.seo-article ul, .seo-article ol {
  margin: 16px 0;
  padding-left: 28px;
  font-size: 16px;
  color: var(--text-light);
  line-height: 2;
}

.seo-article li {
  margin-bottom: 8px;
}

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

.seo-article .highlight-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 24px 0;
}

.seo-article .highlight-box p {
  margin: 0;
  color: var(--text);
}

.seo-tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 24px 0;
}

.seo-tip-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.seo-tip-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seo-tip-card h4 svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.seo-tip-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin: 0;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual {
    order: -1;
  }
  .download-hero-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platforms-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .detail-row {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .detail-row.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: var(--shadow-lg);
  }
  .nav-menu.active {
    display: flex;
  }
  .nav-menu a {
    width: 100%;
    padding: 14px 16px;
  }
  .hero {
    padding: 120px 0 60px;
  }
  .hero-content h1 {
    font-size: 36px;
  }
  .section-header h2 {
    font-size: 28px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .platforms-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .platforms-grid {
    grid-template-columns: 1fr 1fr;
  }
  .requirements-grid {
    grid-template-columns: 1fr 1fr;
  }
  .guide-grid {
    grid-template-columns: 1fr;
  }
  .security-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats-bar {
    flex-wrap: wrap;
    gap: 24px;
  }
  .download-platforms-grid {
    grid-template-columns: 1fr;
  }
  .cta-section h2 {
    font-size: 28px;
  }
  .seo-tips-grid {
    grid-template-columns: 1fr;
  }
  .comparison-table th,
  .comparison-table td {
    padding: 12px 16px;
    font-size: 14px;
  }
  .requirements-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 30px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .btn {
    width: 100%;
  }
  .platforms-grid {
    grid-template-columns: 1fr;
  }
}