/* ============================================
   领效浏览器 - 全局样式表
   ============================================ */

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

:root {
  --base-dark: #0B0D10;
  --base-dark-2: #111318;
  --primary-text: #E2E8F0;
  --heading-text: #FFFFFF;
  --muted-text: #64748B;
  --neon-blue: #3B82F6;
  --neon-purple: #8B5CF6;
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-hover: rgba(255, 255, 255, 0.3);
  --glass-highlight: linear-gradient(180deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
  --container-max: 1280px;
  --nav-height: 72px;
  --section-gap: 15vh;
}

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

body {
  font-family: 'Inter', "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--base-dark);
  color: var(--primary-text);
  line-height: 1.75;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--neon-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #60A5FA;
}

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

/* --- Spin Animation (required for download loading) --- */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Utilities --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

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

/* --- Liquid Glass UI --- */
.liquid-glass {
  background: var(--glass-bg);
  background-image: var(--glass-highlight);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.liquid-glass:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.1);
}

.liquid-glass-strong {
  background: rgba(255, 255, 255, 0.08);
  background-image: var(--glass-highlight);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  color: #fff;
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(59, 130, 246, 0.5);
}

.btn-glass {
  background: var(--glass-bg);
  background-image: var(--glass-highlight);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border: 1px solid var(--glass-border);
  color: var(--heading-text);
}

.btn-glass:hover {
  border-color: var(--glass-border-hover);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
  border-radius: 14px;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none !important;
}

/* --- Navigation --- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(11, 13, 16, 0.6);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s ease;
}

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

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--heading-text);
}

.brand svg {
  width: 32px;
  height: 32px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.main-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--muted-text);
  letter-spacing: 0.02em;
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s ease;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--neon-blue), var(--neon-purple));
  transition: width 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--heading-text);
}

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

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

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--heading-text);
  cursor: pointer;
  padding: 0.5rem;
}

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

.hero-bg-wrap {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, rgba(30, 58, 138, 0.2) 0%, #0B0D10 85%);
}

/* Lens distortion overlay */
.hero-bg-wrap::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  background: radial-gradient(circle at 50% 50%, transparent 30%, rgba(11, 13, 16, 0.8) 90%);
  box-shadow: inset 0 0 100px rgba(11, 13, 16, 0.9);
}

/* Speed Tunnel 3D Grid */
.speed-tunnel-container {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  perspective: 200px;
  transform-style: preserve-3d;
  perspective-origin: 55% 45%;
  z-index: 1;
}

.tunnel-grid-layer {
  position: absolute;
  width: 2000px;
  height: 2000px;
  border: 2px solid rgba(139, 92, 246, 0.25);
  background: transparent;
  margin-left: -1000px;
  margin-top: -1000px;
  transform: rotateX(75deg) translate3d(0, -900px, -100px);
  animation: tunnel-grid-zoom 6s linear infinite;
  filter: drop-shadow(0 0 12px rgba(59, 130, 246, 0.6));
}

@keyframes tunnel-grid-zoom {
  0% {
    transform: rotateX(75deg) translate3d(0, -500px, -200px);
  }
  100% {
    transform: rotateX(75deg) translate3d(0, 500px, 300px);
  }
}

/* Speed lines */
.speed-line {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 200px;
  background: linear-gradient(to bottom, transparent, rgba(59, 130, 246, 0.8), transparent);
  animation: speed-line-dash 2s linear infinite;
  filter: blur(1px);
}

.speed-line:nth-child(2) { left: 45%; animation-delay: 0.3s; height: 150px; }
.speed-line:nth-child(3) { left: 55%; animation-delay: 0.7s; height: 250px; }
.speed-line:nth-child(4) { left: 40%; animation-delay: 1.1s; height: 120px; }
.speed-line:nth-child(5) { left: 60%; animation-delay: 1.5s; height: 180px; }
.speed-line:nth-child(6) { left: 48%; animation-delay: 0.5s; height: 300px; }
.speed-line:nth-child(7) { left: 52%; animation-delay: 1.2s; height: 160px; }

@keyframes speed-line-dash {
  0% {
    transform: translate3d(0, -800px, 0);
    opacity: 0;
  }
  30% {
    opacity: 1;
  }
  100% {
    transform: translate3d(0, 800px, 0);
    opacity: 0;
  }
}

/* Hero content */
.hero-content {
  position: relative;
  z-index: 20;
  text-align: center;
  max-width: 800px;
  padding: 2.5rem;
  background: rgba(11, 13, 16, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border-radius: 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: rgba(59, 130, 246, 0.15);
  border: 1px solid rgba(59, 130, 246, 0.3);
  border-radius: 100px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: #93C5FD;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--heading-text);
  margin-bottom: 1.25rem;
  text-shadow: 0 0 40px rgba(59, 130, 246, 0.3);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--muted-text);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--muted-text);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 20;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted-text);
  font-size: 0.75rem;
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--neon-blue);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  color: var(--heading-text);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--muted-text);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Features Section --- */
.section {
  padding: var(--section-gap) 0;
  position: relative;
}

.features-wrapper {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  perspective: 1000px;
}

.feature-card {
  padding: 2.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(59, 130, 246, 0.12);
}

.feature-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(139, 92, 246, 0.2));
  border-radius: 14px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

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

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading-text);
  margin-bottom: 0.75rem;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--muted-text);
  line-height: 1.7;
}

/* --- Platform Downloads --- */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.platform-card {
  padding: 2rem 1.5rem;
  text-align: center;
  transition: transform 0.3s ease;
}

.platform-card:hover {
  transform: translateY(-4px);
}

.platform-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 16px;
  border: 1px solid rgba(59, 130, 246, 0.2);
}

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

.platform-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--heading-text);
  margin-bottom: 0.5rem;
}

.platform-card p {
  font-size: 0.8125rem;
  color: var(--muted-text);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.platform-card .btn {
  width: 100%;
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
}

/* --- Deep Feature Showcase --- */
.deep-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 6rem;
}

.deep-feature:last-child {
  margin-bottom: 0;
}

.deep-feature.reverse {
  direction: rtl;
}

.deep-feature.reverse > * {
  direction: ltr;
}

.deep-feature-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
}

.deep-feature-visual img {
  width: 100%;
  height: auto;
}

.deep-feature-content h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--heading-text);
  margin-bottom: 1rem;
  line-height: 1.3;
}

.deep-feature-content p {
  color: var(--muted-text);
  margin-bottom: 1rem;
  font-size: 0.9375rem;
  line-height: 1.75;
}

.deep-feature-content ul {
  list-style: none;
  padding: 0;
}

.deep-feature-content ul li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--primary-text);
  font-size: 0.9375rem;
}

.deep-feature-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
}

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

.testimonial-card {
  padding: 2rem;
  position: relative;
}

.testimonial-stars {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.testimonial-stars svg {
  width: 18px;
  height: 18px;
  color: #FBBF24;
  fill: #FBBF24;
}

.testimonial-text {
  font-size: 0.9375rem;
  color: var(--primary-text);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  color: #fff;
}

.testimonial-info strong {
  display: block;
  color: var(--heading-text);
  font-size: 0.875rem;
  font-weight: 600;
}

.testimonial-info span {
  font-size: 0.75rem;
  color: var(--muted-text);
}

/* --- Stats Section --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  text-align: center;
}

.stat-card {
  padding: 2.5rem 1.5rem;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--muted-text);
}

/* --- Comparison Table --- */
.comparison-table-wrapper {
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table th {
  font-weight: 600;
  color: var(--heading-text);
  font-size: 0.875rem;
  background: rgba(255, 255, 255, 0.03);
}

.comparison-table td {
  color: var(--primary-text);
  font-size: 0.875rem;
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table .check {
  color: #22C55E;
}

.comparison-table .cross {
  color: #EF4444;
}

.comparison-table .highlight-row {
  background: rgba(59, 130, 246, 0.05);
}

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

.faq-item {
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  background: none;
  border: none;
  color: var(--heading-text);
  font-family: inherit;
  font-size: 1.0625rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: color 0.3s ease;
}

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

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

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

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

.faq-item.open .faq-answer {
  max-height: 500px;
  padding-bottom: 1.5rem;
}

.faq-answer p {
  color: var(--muted-text);
  line-height: 1.7;
  font-size: 0.9375rem;
}

/* --- Download Page Specific --- */
.download-hero {
  position: relative;
  padding: calc(var(--nav-height) + 6rem) 0 5rem;
  text-align: center;
  overflow: hidden;
}

.download-hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(30, 58, 138, 0.3) 0%, var(--base-dark) 60%);
  z-index: 0;
}

.download-hero .container {
  position: relative;
  z-index: 1;
}

.download-card-main {
  max-width: 640px;
  margin: 0 auto;
  padding: 3rem;
  text-align: center;
}

.download-card-main .platform-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 1.5rem;
}

.download-card-main .platform-icon svg {
  width: 40px;
  height: 40px;
}

.download-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.8125rem;
  color: var(--muted-text);
}

.download-meta span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.version-info {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 12px;
  padding: 1.25rem;
  margin-top: 1.5rem;
  text-align: left;
}

.version-info-item {
  display: flex;
  justify-content: space-between;
  padding: 0.5rem 0;
  font-size: 0.8125rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

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

.version-info-item span:first-child {
  color: var(--muted-text);
}

.version-info-item span:last-child {
  color: var(--primary-text);
  font-weight: 500;
}

/* Installation Steps */
.steps-container {
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  position: relative;
}

.step:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 56px;
  width: 2px;
  height: calc(100% + 1rem);
  background: linear-gradient(180deg, var(--neon-blue), transparent);
}

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  color: #fff;
  flex-shrink: 0;
}

.step-content h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--heading-text);
  margin-bottom: 0.5rem;
  margin-top: 0.75rem;
}

.step-content p {
  font-size: 0.9375rem;
  color: var(--muted-text);
  line-height: 1.7;
}

/* Sys Requirements */
.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.sysreq-card {
  padding: 2rem;
}

.sysreq-card h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--heading-text);
  margin-bottom: 1.25rem;
}

.sysreq-card h4 svg {
  width: 24px;
  height: 24px;
  color: var(--neon-blue);
}

.sysreq-card ul {
  list-style: none;
}

.sysreq-card ul li {
  padding: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--muted-text);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  justify-content: space-between;
}

.sysreq-card ul li:last-child {
  border-bottom: none;
}

.sysreq-card ul li strong {
  color: var(--primary-text);
  font-weight: 500;
}

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

.changelog-item {
  padding: 1.5rem 2rem;
  margin-bottom: 1rem;
  position: relative;
  padding-left: 2.5rem;
}

.changelog-item::before {
  content: '';
  position: absolute;
  left: 1rem;
  top: 1.75rem;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
}

.changelog-version {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--neon-blue);
  margin-bottom: 0.25rem;
}

.changelog-date {
  font-size: 0.75rem;
  color: var(--muted-text);
  margin-bottom: 0.5rem;
}

.changelog-note {
  font-size: 0.875rem;
  color: var(--primary-text);
  line-height: 1.6;
}

/* --- SEO Page Specific --- */
.seo-content {
  max-width: 800px;
  margin: 0 auto;
}

.seo-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--heading-text);
  margin: 3rem 0 1rem;
  line-height: 1.3;
}

.seo-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--heading-text);
  margin: 2rem 0 0.75rem;
}

.seo-content p {
  color: var(--muted-text);
  line-height: 1.8;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.seo-content ul,
.seo-content ol {
  margin: 0.75rem 0 1rem 1.5rem;
  color: var(--muted-text);
}

.seo-content ul li,
.seo-content ol li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.seo-tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin: 2rem 0;
}

.seo-tip-card {
  padding: 1.5rem;
}

.seo-tip-card h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--heading-text);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.seo-tip-card p {
  font-size: 0.8125rem;
  margin-bottom: 0;
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  padding: calc(var(--section-gap) * 0.8) 0;
  position: relative;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(30, 58, 138, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--heading-text);
  margin-bottom: 1rem;
}

.cta-desc {
  color: var(--muted-text);
  margin-bottom: 2rem;
  font-size: 1.0625rem;
}

/* --- Footer --- */
.site-footer {
  padding: 2.5rem 0;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 4rem;
}

.footer-seal {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #22C55E;
  font-size: 0.8125rem;
  margin-bottom: 0.75rem;
}

.footer-seal svg {
  width: 16px;
  height: 16px;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--muted-text);
  line-height: 1.6;
}

/* --- Scroll Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .features-wrapper {
    grid-template-columns: 1fr;
  }

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

  .deep-feature {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .deep-feature.reverse {
    direction: ltr;
  }

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

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

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

@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(11, 13, 16, 0.95);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--glass-border);
  }

  .main-nav.open {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

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

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

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

  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .seo-tips-grid {
    grid-template-columns: 1fr;
  }

  .comparison-table-wrapper {
    font-size: 0.8125rem;
  }

  .comparison-table th,
  .comparison-table td {
    padding: 0.75rem 1rem;
  }

  .step {
    gap: 1rem;
  }

  .faq-question {
    font-size: 0.9375rem;
  }
}

@media (max-width: 480px) {
  .hero-content {
    padding: 1.5rem;
  }

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

  .download-card-main {
    padding: 2rem 1.5rem;
  }

  .feature-card {
    padding: 1.75rem;
  }
}