/* ============================================
   Google Chrome Download Landing Page
   Shared Stylesheet
   ============================================ */

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

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

body {
  font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
  color: #202124;
  background: #ffffff;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #4385f5;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1a73e8;
}

ul, ol {
  list-style: none;
}

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Product+Sans:wght@400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Mono:wght@400;500&display=swap');

/* ---- CSS Variables ---- */
:root {
  --green-600: #1a8b5c;
  --green-700: #0e6d44;
  --green-500: #34a853;
  --yellow-500: #fdd835;
  --red-500: #e84536;
  --blue-500: #4385f5;
  --slate-900: #202124;
  --slate-800: #3c4043;
  --slate-600: #5f6368;
  --slate-400: #80868b;
  --slate-200: #dadce0;
  --slate-100: #f1f3f4;
  --white: #ffffff;
  --page-padding: clamp(1.5rem, 4vw, 4rem);
  --section-gap: 6rem;
  --card-padding: 2rem;
  --card-gap: 1.5rem;
  --radius-card: 1rem;
  --radius-pill: 999px;
  --radius-btn: 1.5rem;
}

/* ---- Spin Animation for Download Loading ---- */
@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 float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(26, 139, 92, 0.4); }
  50% { box-shadow: 0 0 0 12px rgba(26, 139, 92, 0); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

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

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

.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; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

/* ---- Navigation ---- */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--page-padding);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--slate-900);
}

.nav-logo svg {
  width: 28px;
  height: 28px;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-center a {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--slate-800);
  padding: 0.25rem 0;
  position: relative;
  transition: color 0.2s ease;
}

.nav-center a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--green-600);
  transition: width 0.2s ease;
}

.nav-center a:hover {
  color: var(--green-600);
}

.nav-center a:hover::after {
  width: 100%;
}

.nav-center a.active {
  color: var(--green-600);
}

.nav-center a.active::after {
  width: 100%;
}

.nav-right .btn-download {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--white);
  background: var(--green-600);
  border: none;
  padding: 0.625rem 1.5rem;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease;
}

.nav-right .btn-download:hover {
  background: var(--green-700);
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1rem;
  padding: 1rem 2rem;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  outline: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--green-600);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--green-700);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(26, 139, 92, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--slate-900);
  border: 1px solid var(--slate-200);
}

.btn-secondary:hover {
  background: var(--slate-100);
  border-color: var(--slate-200);
}

.btn-white {
  background: var(--white);
  color: var(--green-600);
}

.btn-white:hover {
  background: var(--slate-100);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.btn-lg {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #f8faf9 0%, #ffffff 50%, #f1f8f4 100%);
}

.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  padding: 0 var(--page-padding);
  padding-top: 80px;
}

.hero-label {
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--green-600);
  margin-bottom: 1rem;
}

.hero-title {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.0;
  letter-spacing: -0.015em;
  color: var(--slate-900);
}

.hero-desc {
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--slate-800);
  max-width: 520px;
  margin-top: 1.5rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--slate-400);
  flex-wrap: wrap;
}

/* ---- Section Headers ---- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 var(--page-padding);
}

.section-header h2 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.2;
  color: var(--slate-900);
}

.section-header p {
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--slate-400);
  margin-top: 1rem;
}

/* ---- Feature Cards ---- */
.features {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
  max-width: 1200px;
  margin: 4rem auto 0;
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.feature-card:hover {
  box-shadow: 0 4px 20px rgba(32, 33, 36, 0.08);
  border-color: var(--slate-100);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  color: var(--green-600);
}

.feature-card h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1.4;
  color: var(--slate-900);
  margin-top: 1.5rem;
}

.feature-card p {
  font-family: 'Roboto', sans-serif;
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--slate-800);
  margin-top: 0.75rem;
}

.feature-card a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--green-600);
  margin-top: 1rem;
  text-decoration: none;
}

.feature-card a:hover {
  text-decoration: underline;
}

.feature-card a svg {
  width: 16px;
  height: 16px;
}

/* ---- Platform Download Section ---- */
.platforms {
  padding: var(--section-gap) var(--page-padding);
  background: var(--slate-100);
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap);
  max-width: 1100px;
  margin: 3rem auto 0;
}

.platform-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 2rem 1.5rem;
  text-align: center;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  border: 1px solid var(--slate-200);
}

.platform-card:hover {
  box-shadow: 0 8px 30px rgba(32, 33, 36, 0.1);
  transform: translateY(-6px);
}

.platform-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto;
  color: var(--slate-800);
}

.platform-card h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.125rem;
  color: var(--slate-900);
  margin-top: 1rem;
}

.platform-card p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-top: 0.5rem;
  line-height: 1.5;
}

.platform-card .btn {
  margin-top: 1.25rem;
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  width: 100%;
}

/* ---- Deep Feature Sections ---- */
.deep-features {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

.deep-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  max-width: 1100px;
  margin: 0 auto;
  align-items: center;
}

.deep-feature:nth-child(even) {
  direction: rtl;
}

.deep-feature:nth-child(even) > * {
  direction: ltr;
}

.deep-feature + .deep-feature {
  margin-top: 5rem;
}

.deep-feature-visual {
  background: linear-gradient(135deg, var(--slate-100) 0%, #e8f5e9 100%);
  border-radius: var(--radius-card);
  padding: 2rem;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.deep-feature-visual::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(26, 139, 92, 0.08) 0%, transparent 70%);
  top: -50px;
  right: -50px;
  border-radius: 50%;
}

.deep-feature-visual svg {
  width: 180px;
  height: 180px;
  color: var(--green-600);
  opacity: 0.9;
}

.deep-feature-text h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: 1.75rem;
  line-height: 1.3;
  color: var(--slate-900);
}

.deep-feature-text p {
  font-family: 'Roboto', sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--slate-800);
  margin-top: 1rem;
}

.deep-feature-text ul {
  margin-top: 1.25rem;
}

.deep-feature-text ul li {
  font-family: 'Roboto', sans-serif;
  font-size: 0.9375rem;
  color: var(--slate-600);
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
  line-height: 1.6;
}

.deep-feature-text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85rem;
  width: 6px;
  height: 6px;
  background: var(--green-600);
  border-radius: 50%;
}

/* ---- Testimonials ---- */
.testimonials {
  padding: var(--section-gap) var(--page-padding);
  background: var(--slate-100);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--card-gap);
  max-width: 1100px;
  margin: 3rem auto 0;
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: var(--card-padding);
  border: 1px solid var(--slate-200);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.testimonial-card:hover {
  box-shadow: 0 4px 20px rgba(32, 33, 36, 0.08);
  transform: translateY(-4px);
}

.testimonial-stars {
  display: flex;
  gap: 0.25rem;
  color: var(--yellow-500);
}

.testimonial-stars svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.testimonial-card p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--slate-800);
  margin-top: 1rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--slate-100);
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-600), var(--green-500));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
}

.testimonial-author-info strong {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--slate-900);
  display: block;
}

.testimonial-author-info span {
  font-family: 'Roboto', sans-serif;
  font-size: 0.75rem;
  color: var(--slate-400);
}

/* ---- Stats Section ---- */
.stats {
  padding: 5rem var(--page-padding);
  background: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  max-width: 1000px;
  margin: 0 auto;
}

.stat-item {
  text-align: center;
  padding: 2rem;
}

.stat-number {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
  color: var(--green-600);
}

.stat-label {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-top: 0.75rem;
  line-height: 1.5;
}

/* ---- Comparison Table ---- */
.comparison {
  padding: var(--section-gap) var(--page-padding);
  background: var(--slate-100);
}

.comparison-table-wrap {
  max-width: 900px;
  margin: 3rem auto 0;
  overflow-x: auto;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Roboto', sans-serif;
}

.comparison-table thead th {
  background: var(--slate-100);
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--slate-900);
  padding: 1rem 1.5rem;
  text-align: center;
  border-bottom: 2px solid var(--slate-200);
}

.comparison-table thead th:first-child {
  text-align: left;
}

.comparison-table tbody tr {
  background: var(--white);
  transition: background 0.2s ease;
}

.comparison-table tbody tr:nth-child(even) {
  background: #fafbfc;
}

.comparison-table tbody tr:hover {
  background: #f0f7f4;
}

.comparison-table tbody td {
  padding: 1rem 1.5rem;
  font-size: 0.9375rem;
  color: var(--slate-800);
  text-align: center;
  border-bottom: 1px solid var(--slate-200);
}

.comparison-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
}

.comparison-table .icon-check {
  color: var(--green-600);
}

.comparison-table .icon-cross {
  color: var(--red-500);
}

.comparison-note {
  text-align: center;
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-400);
  margin-top: 1.5rem;
}

/* ---- FAQ Section ---- */
.faq {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

.faq-list {
  max-width: 800px;
  margin: 3rem auto 0;
}

.faq-item {
  border-bottom: 1px solid var(--slate-200);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 0;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.0625rem;
  color: var(--slate-900);
  text-align: left;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--green-600);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--slate-400);
  flex-shrink: 0;
  margin-left: 1rem;
  transition: transform 0.3s ease;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

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

.faq-answer p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--slate-600);
}

/* ---- CTA Band ---- */
.cta-band {
  padding: 4rem var(--page-padding);
  background: var(--green-600);
  text-align: center;
}

.cta-band h2 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.2;
  color: var(--white);
}

.cta-band p {
  font-family: 'Roboto', sans-serif;
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin: 1rem auto 0;
}

.cta-band .btn {
  margin-top: 2rem;
}

.cta-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1.5rem;
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
}

.cta-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.2s ease;
}

.cta-links a:hover {
  color: var(--white);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--slate-100);
  padding: 3rem var(--page-padding) 2rem;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
}

.footer-links a {
  color: var(--slate-800);
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--green-600);
}

.footer-divider {
  height: 1px;
  background: var(--slate-200);
  margin: 2rem 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-400);
  line-height: 1.5;
}

.footer-disclaimer {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-card);
  padding: 1.5rem;
  margin-top: 1.5rem;
  text-align: center;
}

.footer-disclaimer p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-600);
  line-height: 1.6;
}

.footer-disclaimer strong {
  color: var(--green-600);
}

/* ============================================
   DOWNLOAD PAGE SPECIFIC STYLES
   ============================================ */

.download-hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #f8faf9 0%, #e8f5e9 50%, #f1f8f4 100%);
  padding: 100px var(--page-padding) 4rem;
}

.download-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(26, 139, 92, 0.1);
  color: var(--green-600);
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1.5rem;
}

.download-hero h1 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.1;
  color: var(--slate-900);
}

.download-hero p {
  font-family: 'Roboto', sans-serif;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--slate-600);
  max-width: 560px;
  margin: 1rem auto 0;
}

.download-main-card {
  background: var(--white);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-card);
  padding: 2.5rem;
  max-width: 480px;
  margin: 2.5rem auto 0;
  box-shadow: 0 4px 20px rgba(32, 33, 36, 0.06);
}

.download-main-card .platform-icon-large {
  width: 64px;
  height: 64px;
  margin: 0 auto;
  color: var(--slate-800);
}

.download-main-card h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.5rem;
  color: var(--slate-900);
  margin-top: 1rem;
}

.download-meta {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 0.75rem;
  font-family: 'Roboto Mono', monospace;
  font-size: 0.75rem;
  color: var(--slate-400);
}

.download-main-card .btn {
  margin-top: 1.5rem;
  width: 100%;
  animation: pulse 2s infinite;
}

.download-sysreq {
  margin-top: 1rem;
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-400);
  line-height: 1.6;
}

/* Multi-platform cards */
.platforms-download {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

/* Install guide */
.install-guide {
  padding: var(--section-gap) var(--page-padding);
  background: var(--slate-100);
}

.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 3rem auto 0;
}

.guide-card {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 2.5rem;
  border: 1px solid var(--slate-200);
}

.guide-card h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--slate-900);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.guide-card h3 svg {
  width: 28px;
  height: 28px;
  color: var(--green-600);
}

.guide-steps {
  counter-reset: step;
}

.guide-step {
  display: flex;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--slate-100);
}

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

.guide-step-number {
  width: 32px;
  height: 32px;
  background: var(--green-600);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.guide-step-content h4 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1rem;
  color: var(--slate-900);
}

.guide-step-content p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: var(--slate-600);
  margin-top: 0.25rem;
  line-height: 1.6;
}

/* System requirements */
.sysreq {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--card-gap);
  max-width: 1100px;
  margin: 3rem auto 0;
}

.sysreq-card {
  background: var(--slate-100);
  border-radius: var(--radius-card);
  padding: 1.75rem;
}

.sysreq-card h4 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1rem;
  color: var(--slate-900);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.sysreq-card h4 svg {
  width: 20px;
  height: 20px;
  color: var(--green-600);
}

.sysreq-card ul li {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-600);
  padding: 0.35rem 0;
  line-height: 1.5;
}

/* Changelog */
.changelog {
  padding: var(--section-gap) var(--page-padding);
  background: var(--slate-100);
}

.changelog-list {
  max-width: 800px;
  margin: 3rem auto 0;
}

.changelog-item {
  background: var(--white);
  border-radius: var(--radius-card);
  padding: 1.75rem;
  margin-bottom: 1rem;
  border: 1px solid var(--slate-200);
}

.changelog-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.changelog-version {
  font-family: 'Roboto Mono', monospace;
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--green-600);
  background: rgba(26, 139, 92, 0.08);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-pill);
}

.changelog-date {
  font-family: 'Roboto', sans-serif;
  font-size: 0.8125rem;
  color: var(--slate-400);
}

.changelog-item ul li {
  font-family: 'Roboto', sans-serif;
  font-size: 0.875rem;
  color: var(--slate-600);
  padding: 0.35rem 0;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.6;
}

.changelog-item ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 5px;
  height: 5px;
  background: var(--green-600);
  border-radius: 50%;
}

/* Security notice */
.security-notice {
  padding: 3rem var(--page-padding);
  background: linear-gradient(135deg, #e8f5e9 0%, #f1f8f4 100%);
  text-align: center;
}

.security-notice-icon {
  width: 48px;
  height: 48px;
  color: var(--green-600);
  margin: 0 auto;
}

.security-notice h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--slate-900);
  margin-top: 1rem;
}

.security-notice p {
  font-family: 'Roboto', sans-serif;
  font-size: 0.9375rem;
  color: var(--slate-600);
  max-width: 600px;
  margin: 0.75rem auto 0;
  line-height: 1.7;
}

/* ============================================
   ZH-CN SEO PAGE SPECIFIC STYLES
   ============================================ */

.seo-hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #f8faf9 0%, #e8f5e9 40%, #f1f8f4 100%);
  padding: 100px var(--page-padding) 4rem;
}

.seo-hero h1 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.15;
  color: var(--slate-900);
}

.seo-hero p {
  font-family: 'Roboto', sans-serif;
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--slate-600);
  max-width: 640px;
  margin: 1.25rem auto 0;
}

.seo-hero .btn {
  margin-top: 2rem;
}

.seo-content {
  padding: var(--section-gap) var(--page-padding);
  background: var(--white);
}

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

.seo-content-inner h2 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 400;
  font-size: 1.75rem;
  color: var(--slate-900);
  margin-bottom: 1rem;
}

.seo-content-inner p {
  font-family: 'Roboto', sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--slate-800);
  margin-bottom: 1.25rem;
}

.seo-content-inner h3 {
  font-family: 'Product Sans', 'Google Sans', sans-serif;
  font-weight: 500;
  font-size: 1.25rem;
  color: var(--slate-900);
  margin: 2rem 0 0.75rem;
}

.seo-content-inner ul {
  margin: 1rem 0 1.5rem 1.5rem;
}

.seo-content-inner ul li {
  font-family: 'Roboto', sans-serif;
  font-size: 0.9375rem;
  color: var(--slate-700);
  padding: 0.4rem 0;
  line-height: 1.7;
  list-style-type: disc;
}

.seo-highlight {
  background: var(--slate-100);
  border-left: 4px solid var(--green-600);
  padding: 1.5rem 2rem;
  margin: 2rem 0;
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
}

.seo-highlight p {
  font-family: 'Roboto', sans-serif;
  font-size: 1rem;
  color: var(--slate-700);
  line-height: 1.7;
  margin: 0;
}

.seo-highlight strong {
  color: var(--green-600);
}

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

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

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

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

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

@media (max-width: 768px) {
  .nav-center {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--slate-200);
    flex-direction: column;
    padding: 1rem var(--page-padding);
    gap: 1rem;
  }

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

  .nav-toggle {
    display: block;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 4rem;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-meta {
    justify-content: center;
  }

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

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

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

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

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

  .deep-feature:nth-child(even) {
    direction: ltr;
  }

  .comparison-table-wrap {
    overflow-x: scroll;
  }

  .comparison-table {
    min-width: 700px;
  }

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

  .footer-top,
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-links {
    flex-wrap: wrap;
    gap: 1rem;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }
}