/* ============================================
   WPS Office Download Landing Page
   Pure HTML + CSS + JS | No Frameworks
   ============================================ */

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

:root {
  --bg-primary: #F6F7F9;
  --bg-pure: #FFFFFF;
  --brand-red: #E60012;
  --brand-red-dark: #C4000F;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --text-muted: #B3B3B3;
  --border-light: rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

body {
  font-family: var(--font-stack);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* ---- Spin Animation (required for download.js) ---- */
@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(-8px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

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

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

/* ---- Navigation ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.navbar-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

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

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

.nav-item a {
  display: block;
  padding: 8px 20px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-item a:hover {
  color: var(--text-primary);
  background: rgba(0,0,0,0.03);
}

.nav-item.active a {
  color: var(--brand-red);
  background: rgba(230,0,18,0.06);
  font-weight: 600;
}

.nav-item.active a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--brand-red);
  border-radius: 1px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--brand-red);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--brand-red-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230,0,18,0.35);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--bg-pure);
  color: var(--brand-red);
  border: 1.5px solid rgba(230,0,18,0.15);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--brand-red);
  color: #fff;
  border-color: var(--brand-red);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(230,0,18,0.25);
}

.btn-white {
  background: #fff;
  color: var(--brand-red);
}

.btn-white:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.btn-large {
  padding: 18px 40px;
  font-size: 18px;
  border-radius: var(--radius-md);
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ---- Section Base ---- */
.section {
  padding: 100px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand-red);
  margin-bottom: 12px;
  padding: 4px 12px;
  background: rgba(230,0,18,0.06);
  border-radius: 20px;
}

.section-title {
  font-size: 36px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ---- Hero Section ---- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.hero-bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(ellipse at 30% 50%, rgba(230,0,18,0.08) 0%, transparent 60%);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 32px;
  animation: fadeInUp 1s ease-out;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 40px;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 32px;
}

.hero-badge svg {
  width: 16px;
  height: 16px;
}

.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 20px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.hero-desc {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,0.85);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-meta {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  color: rgba(255,255,255,0.6);
  font-size: 14px;
}

.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-meta-item svg {
  width: 16px;
  height: 16px;
  opacity: 0.7;
}

/* ---- Features Grid ---- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-pure);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 40px 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(--brand-red), #ff4757);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230,0,18,0.1);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(230,0,18,0.06);
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
}

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

.feature-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 15px;
  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: var(--bg-pure);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
}

.platform-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(230,0,18,0.12);
}

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

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

.platform-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
}

.platform-version {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

/* ---- Deep Dive Section ---- */
.deep-dive-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 100px;
}

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

.deep-dive-item.reverse {
  direction: rtl;
}

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

.deep-dive-content {
  max-width: 520px;
}

.deep-dive-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-red);
  margin-bottom: 12px;
  padding: 4px 14px;
  background: rgba(230,0,18,0.06);
  border-radius: 20px;
}

.deep-dive-title {
  font-size: 30px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.deep-dive-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.deep-dive-list {
  list-style: none;
}

.deep-dive-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 15px;
  color: var(--text-secondary);
}

.deep-dive-list li svg {
  width: 20px;
  height: 20px;
  color: var(--brand-red);
  flex-shrink: 0;
  margin-top: 2px;
}

.deep-dive-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-pure);
}

.deep-dive-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Stats Section ---- */
.stats-section {
  background: var(--bg-pure);
  padding: 80px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.stat-item {
  padding: 24px;
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  color: var(--brand-red);
  line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 15px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ---- Comparison Table ---- */
.comparison-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-pure);
  font-size: 15px;
}

.comparison-table th {
  background: var(--bg-primary);
  padding: 16px 24px;
  text-align: left;
  font-weight: 600;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-light);
  white-space: nowrap;
}

.comparison-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
}

.comparison-table tr:hover td {
  background: rgba(230,0,18,0.02);
}

.comparison-table .highlight-row td {
  background: rgba(230,0,18,0.03);
  font-weight: 500;
  color: var(--text-primary);
}

.comparison-table .check svg {
  width: 20px;
  height: 20px;
  color: #22c55e;
}

.comparison-table .cross svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
}

.comparison-table .wps-advantage {
  color: var(--brand-red);
  font-weight: 600;
}

/* ---- Reviews Section ---- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-pure);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
}

.review-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.review-stars svg {
  width: 18px;
  height: 18px;
  color: #f59e0b;
  fill: #f59e0b;
}

.review-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-red), #ff6b6b);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 600;
}

.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

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

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

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

.faq-item:hover {
  border-color: rgba(230,0,18,0.1);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
}

.faq-question svg {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

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

.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: 0 24px 20px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- Download Page Specific ---- */
.download-hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}

.download-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 70% 30%, rgba(230,0,18,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.download-hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
}

.download-hero-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.download-hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 40px;
}

.download-main-card {
  background: var(--bg-pure);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 48px;
  max-width: 900px;
  margin: -40px auto 0;
  position: relative;
  z-index: 2;
}

.download-main-icon {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, var(--brand-red), #ff4757);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.download-main-icon svg {
  width: 56px;
  height: 56px;
  color: #fff;
}

.download-main-info {
  flex: 1;
}

.download-main-title {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-main-meta {
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.download-main-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.download-main-meta svg {
  width: 16px;
  height: 16px;
}

/* ---- Platform Download Cards (Download Page) ---- */
.download-platforms {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.download-platform-card {
  background: var(--bg-pure);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
}

.download-platform-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.download-platform-card .platform-icon {
  margin-bottom: 20px;
}

.download-platform-card .platform-name {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 8px;
}

.download-platform-card .platform-version {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.download-platform-card .platform-size {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

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

.download-steps-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.download-steps ol {
  padding-left: 18px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---- Install Guide ---- */
.guide-section {
  background: var(--bg-pure);
  border-radius: var(--radius-lg);
  padding: 48px;
  border: 1px solid var(--border-light);
}

.guide-title {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 32px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.guide-title svg {
  width: 28px;
  height: 28px;
  color: var(--brand-red);
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.guide-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  align-items: start;
}

.guide-step-num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--brand-red), #ff4757);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}

.guide-step-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.guide-step-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- System Requirements ---- */
.sysreq-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.sysreq-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sysreq-card-title svg {
  width: 22px;
  height: 22px;
  color: var(--brand-red);
}

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

.sysreq-list li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
}

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

.sysreq-list li span:first-child {
  color: var(--text-muted);
}

/* ---- Changelog ---- */
.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.changelog-item {
  background: var(--bg-pure);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  border-left: 4px solid var(--brand-red);
}

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

.changelog-version {
  font-size: 20px;
  font-weight: 700;
  color: var(--brand-red);
}

.changelog-date {
  font-size: 14px;
  color: var(--text-muted);
}

.changelog-badge {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  background: rgba(230,0,18,0.08);
  color: var(--brand-red);
  border-radius: 20px;
}

.changelog-notes {
  list-style: none;
}

.changelog-notes li {
  font-size: 15px;
  color: var(--text-secondary);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  line-height: 1.6;
}

.changelog-notes li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 14px;
  width: 6px;
  height: 6px;
  background: var(--brand-red);
  border-radius: 50%;
}

/* ---- Safety Notice ---- */
.safety-box {
  background: linear-gradient(135deg, rgba(230,0,18,0.04), rgba(230,0,18,0.02));
  border: 1px solid rgba(230,0,18,0.1);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.safety-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(230,0,18,0.08);
  border-radius: 50%;
}

.safety-icon svg {
  width: 36px;
  height: 36px;
  color: var(--brand-red);
}

.safety-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
}

.safety-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- SEO Page Specific ---- */
.seo-hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  padding: 140px 0 100px;
  position: relative;
}

.seo-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(230,0,18,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.seo-hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 32px;
  text-align: center;
}

.seo-hero h1 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 20px;
}

.seo-hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 32px;
}

.keyword-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 20px;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  font-weight: 500;
  margin: 3px;
}

/* ---- Footer ---- */
.footer {
  background: #1A1A1A;
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-brand-name svg {
  width: 32px;
  height: 32px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
}

.footer-col-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 24px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
}

.footer-disclaimer {
  margin-top: 8px;
  font-size: 12px;
  color: rgba(255,255,255,0.3);
}

/* ---- Scroll Reveal Animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s 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; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }

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

@media (max-width: 768px) {
  .navbar-container { padding: 0 16px; }
  .nav-item a { padding: 6px 12px; font-size: 14px; }
  .container { padding: 0 20px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .features-grid { grid-template-columns: 1fr; }
  .platforms-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stat-number { font-size: 36px; }
  .deep-dive-item { grid-template-columns: 1fr; gap: 32px; }
  .deep-dive-item.reverse { direction: ltr; }
  .sysreq-grid { grid-template-columns: 1fr; }
  .download-main-card { flex-direction: column; text-align: center; padding: 32px 24px; }
  .download-platforms { grid-template-columns: 1fr; }
  .guide-section { padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn { width: 100%; max-width: 320px; }
  .comparison-table th,
  .comparison-table td { padding: 12px 16px; font-size: 14px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }
  .section-title { font-size: 24px; }
  .stats-grid { grid-template-columns: 1fr; }
  .btn-large { padding: 14px 28px; font-size: 16px; }
}

/* ---- Utility Classes ---- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-16 { margin-top: 16px; }
.mb-16 { margin-bottom: 16px; }
.mt-32 { margin-top: 32px; }
.mb-32 { margin-bottom: 32px; }
.mt-48 { margin-top: 48px; }
.mb-48 { margin-bottom: 48px; }
.mt-64 { margin-top: 64px; }
.mb-64 { margin-bottom: 64px; }
.bg-white { background: var(--bg-pure); }