/* ==========================================================================
   WPS Office Landing Page Stylesheet - Premium Teal & Indigo Theme
   ========================================================================== */

/* --- CSS Variables / Design Tokens --- */
:root {
  --primary-gradient: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
  --secondary-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
  --accent-gradient: linear-gradient(135deg, #0d9488 0%, #10b981 100%);
  --hero-gradient: linear-gradient(135deg, #f0fdfa 0%, #e0f2fe 100%);
  --card-gradient: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  
  --primary-color: #0d9488;
  --primary-hover: #0f766e;
  --secondary-color: #0284c7;
  --secondary-hover: #0369a1;
  --accent-color: #10b981;
  --dark-color: #0f172a;
  --text-primary: #1e293b;
  --text-muted: #64748b;
  --light-bg: #f8fafc;
  --border-color: #e2e8f0;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --max-width: 1200px;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.02);
  --shadow-md: 0 4px 20px -2px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 25px -5px rgba(13, 148, 136, 0.1), 0 10px 10px -5px rgba(13, 148, 136, 0.04);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background-color: #ffffff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* --- Layout Utility --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  padding: 80px 0;
  background-color: var(--light-bg);
}

.text-center {
  text-align: center;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--dark-color);
  margin-bottom: 16px;
  letter-spacing: -0.025em;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 50px auto;
}

/* --- Header & Navigation (Glassmorphic) --- */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: var(--transition-smooth);
}

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

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--dark-color);
}

.logo-text {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 6px 12px;
  border-radius: var(--border-radius-sm);
}

.nav-link:hover {
  color: var(--primary-color);
  background-color: rgba(13, 148, 136, 0.05);
}

/* Active Nav Highlighting - Distinct & High Contrast */
.nav-link.active {
  color: #ffffff;
  background: var(--primary-gradient);
  font-weight: 600;
  box-shadow: 0 4px 10px rgba(13, 148, 136, 0.2);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #ffffff;
  background: var(--primary-gradient);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  transition: var(--transition-smooth);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(13, 148, 136, 0.3);
}

.mobile-menu-btn {
  display: none;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--dark-color);
}

/* --- Common Buttons & Spinners --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--border-radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-primary {
  color: #ffffff;
  background: var(--primary-gradient);
  box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 25px rgba(13, 148, 136, 0.3);
}

.btn-primary:disabled, .btn-secondary:disabled {
  opacity: 0.8;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.btn-secondary {
  color: var(--primary-color);
  background-color: #ffffff;
  border: 1.5px solid var(--primary-color);
}

.btn-secondary:hover {
  background-color: rgba(13, 148, 136, 0.04);
  transform: translateY(-2px);
}

.btn-dark {
  color: #ffffff;
  background: var(--secondary-gradient);
  box-shadow: var(--shadow-md);
}

.btn-dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.2);
}

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

/* --- INDEX PAGE SPECIFIC --- */

/* Hero Banner Section */
.hero-section {
  padding: 100px 0 80px 0;
  background: var(--hero-gradient);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--dark-color);
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-title span {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-stats-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--primary-color);
  font-weight: 600;
}

.hero-preview {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-img-wrap {
  width: 100%;
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  padding: 10px;
  box-shadow: 0 30px 60px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(226, 232, 240, 0.8);
  transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
  transition: var(--transition-smooth);
}

.hero-img-wrap:hover {
  transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

/* Product Highlights Card Grid (At least 6) */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.highlight-card {
  background: var(--card-gradient);
  padding: 40px 32px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  transition: var(--transition-smooth);
}

.highlight-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 148, 136, 0.2);
}

.highlight-icon-box {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--border-radius-sm);
  background: rgba(13, 148, 136, 0.08);
  color: var(--primary-color);
  margin-bottom: 24px;
}

.highlight-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 12px;
}

.highlight-card-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Multi-platform quick download cards */
.platform-quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.platform-quick-card {
  background: #ffffff;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition-smooth);
}

.platform-quick-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary-color);
}

.platform-quick-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px auto;
  color: var(--text-primary);
}

.platform-quick-card:hover .platform-quick-icon {
  color: var(--primary-color);
}

.platform-quick-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 8px;
}

.platform-quick-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.platform-quick-btn {
  width: 100%;
  padding: 10px 16px;
  font-size: 0.9rem;
  border-radius: var(--border-radius-sm);
}

/* Deep Feature Row Analyses */
.feature-rows {
  display: flex;
  flex-direction: column;
  gap: 100px;
}

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

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

.feature-row.reverse .feature-info {
  direction: ltr;
}

.feature-row.reverse .feature-media {
  direction: ltr;
}

.feature-tag {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--primary-color);
  background-color: rgba(13, 148, 136, 0.08);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.feature-row-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark-color);
  margin-bottom: 20px;
  line-height: 1.3;
}

.feature-row-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.feature-bullets {
  margin-bottom: 30px;
}

.feature-bullet {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.feature-bullet-icon {
  width: 20px;
  height: 20px;
  color: var(--primary-color);
  margin-top: 3px;
  flex-shrink: 0;
}

.feature-bullet-text {
  font-size: 0.95rem;
  color: var(--text-primary);
}

.feature-media {
  background: var(--light-bg);
  border-radius: var(--border-radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
}

.feature-preview-box {
  background: #ffffff;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

/* Global Stats Section */
.stats-section {
  background: var(--secondary-gradient);
  color: #ffffff;
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1.1rem;
  color: #94a3b8;
  font-weight: 500;
}

/* Comparison Table Section */
.compare-container {
  overflow-x: auto;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  background-color: #ffffff;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.compare-table th, .compare-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.compare-table th {
  background-color: var(--light-bg);
  color: var(--dark-color);
  font-weight: 700;
}

.compare-table th:first-child {
  width: 40%;
}

.compare-table td:first-child {
  font-weight: 600;
  color: var(--dark-color);
}

.compare-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.compare-badge.success {
  background-color: rgba(16, 185, 129, 0.08);
  color: #059669;
}

.compare-badge.warning {
  background-color: rgba(245, 158, 11, 0.08);
  color: #d97706;
}

/* User Reviews Area (At least 6) */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.review-card {
  background: #ffffff;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
}

.review-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 148, 136, 0.15);
}

.review-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.review-author {
  font-weight: 700;
  color: var(--dark-color);
  font-size: 1.05rem;
}

.review-stars {
  display: flex;
  color: #fbbf24;
  gap: 2px;
}

.review-stars svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.review-text {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Collapsible FAQs */
.faqs-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  font-weight: 700;
  color: var(--dark-color);
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  transition: transform 0.3s ease;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
}

.faq-item.open {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-sm);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  color: var(--primary-color);
}

.faq-item.open .faq-answer {
  max-height: 1000px;
  padding: 0 24px 24px 24px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
}

/* --- DOWNLOAD PAGE SPECIFIC --- */

/* Main Download Hero section */
.dl-hero {
  background: var(--hero-gradient);
  padding: 60px 0 80px 0;
}

.dl-main-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.dl-primary-card {
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.dl-primary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
}

.dl-primary-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffffff;
  background: var(--accent-gradient);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.dl-primary-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--dark-color);
  margin-bottom: 12px;
  line-height: 1.2;
}

.dl-primary-meta {
  display: flex;
  gap: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

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

.dl-primary-meta-item svg {
  width: 16px;
  height: 16px;
}

.dl-primary-action {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 30px;
}

.dl-primary-btn {
  width: 100%;
  font-size: 1.15rem;
  padding: 16px 36px;
}

.dl-sys-requirement {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Dedicated platform grid (macOS, iOS, Android) */
.platform-dedicated-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.platform-dedicated-card {
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
  box-shadow: var(--shadow-sm);
}

.platform-dedicated-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: rgba(13, 148, 136, 0.2);
}

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

.platform-card-icon {
  width: 50px;
  height: 50px;
  color: var(--dark-color);
}

.platform-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark-color);
}

.platform-card-meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.platform-card-steps {
  margin-bottom: 30px;
  flex-grow: 1;
}

.platform-card-steps-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 12px;
}

.platform-card-step-item {
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 8px;
  display: flex;
  gap: 8px;
}

.platform-card-step-num {
  font-weight: 700;
  color: var(--primary-color);
}

.platform-card-btn {
  width: 100%;
}

/* Installation Guide Timeline Style */
.install-guide-box {
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 48px;
  box-shadow: var(--shadow-sm);
}

.install-tabs {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 12px;
}

.install-tab-btn {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 16px;
  position: relative;
  transition: var(--transition-smooth);
}

.install-tab-btn.active {
  color: var(--primary-color);
}

.install-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -13px;
  left: 0;
  right: 0;
  height: 3px;
  background-color: var(--primary-color);
}

.install-content-panel {
  display: none;
}

.install-content-panel.active {
  display: block;
}

.install-timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.install-step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 24px;
}

.install-step-badge {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #ffffff;
  font-weight: 800;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(13, 148, 136, 0.25);
}

.install-step-info-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 8px;
}

.install-step-info-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Detailed specifications table */
.specs-table-box {
  background-color: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

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

.specs-table th, .specs-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.specs-table th {
  background-color: var(--light-bg);
  color: var(--dark-color);
  font-weight: 700;
  text-align: left;
}

.specs-table td:first-child {
  font-weight: 700;
  color: var(--dark-color);
  width: 25%;
}

/* Security Guarantee Section */
.sec-guarantee-card {
  background: var(--primary-gradient);
  color: #ffffff;
  border-radius: var(--border-radius-lg);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 40px;
  align-items: center;
  box-shadow: var(--shadow-lg);
}

.sec-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.sec-shield-icon {
  width: 90px;
  height: 90px;
  margin-bottom: 20px;
  filter: drop-shadow(0 10px 15px rgba(255,255,255,0.2));
}

.sec-title {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 8px;
}

.sec-subtitle {
  font-size: 0.95rem;
  opacity: 0.9;
}

.sec-right-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.sec-item {
  display: flex;
  gap: 12px;
}

.sec-item-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: #ffffff;
}

.sec-item-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 6px;
}

.sec-item-desc {
  font-size: 0.85rem;
  opacity: 0.85;
  line-height: 1.5;
}

/* Changelog Section */
.changelog-box {
  background: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.changelog-item {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 24px;
}

.changelog-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
  margin-bottom: 0;
}

.changelog-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.changelog-version {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--dark-color);
  display: flex;
  align-items: center;
  gap: 10px;
}

.changelog-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  background-color: rgba(13, 148, 136, 0.08);
  padding: 2px 8px;
  border-radius: 999px;
}

.changelog-date {
  font-size: 0.9rem;
  color: var(--text-muted);
}

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

.changelog-bullet {
  font-size: 0.925rem;
  color: var(--text-primary);
  display: flex;
  gap: 8px;
}

.changelog-bullet::before {
  content: '✦';
  color: var(--primary-color);
  font-weight: bold;
}

/* --- SEO INFORMATIVE PAGE SPECIFIC --- */

/* Article + Sidebar Magazine Layout */
.magazine-grid {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 40px;
}

/* Left main column */
.article-col {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.article-card {
  background-color: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 40px;
  box-shadow: var(--shadow-sm);
}

.article-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.article-title-large {
  font-size: 2rem;
  font-weight: 800;
  color: var(--dark-color);
  line-height: 1.3;
  margin-bottom: 24px;
}

.article-lead {
  font-size: 1.1rem;
  color: var(--text-primary);
  font-weight: 500;
  line-height: 1.7;
  padding-left: 16px;
  border-left: 4px solid var(--primary-color);
  margin-bottom: 30px;
}

.article-rich-text h2, .article-rich-text h3 {
  color: var(--dark-color);
  margin: 32px 0 16px 0;
  font-weight: 800;
}

.article-rich-text h2 {
  font-size: 1.5rem;
  border-bottom: 1.5px solid var(--border-color);
  padding-bottom: 8px;
}

.article-rich-text h3 {
  font-size: 1.2rem;
}

.article-rich-text p {
  font-size: 0.975rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
}

.article-highlight-box {
  background-color: var(--light-bg);
  border-radius: var(--border-radius-md);
  padding: 24px;
  border-left: 4px solid var(--secondary-color);
  margin: 30px 0;
}

.article-highlight-title {
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.article-highlight-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Sidebar right column */
.sidebar-col {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.sidebar-widget {
  background-color: #ffffff;
  border-radius: var(--border-radius-lg);
  border: 1px solid var(--border-color);
  padding: 30px;
  box-shadow: var(--shadow-sm);
}

.sidebar-widget-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--dark-color);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-color);
}

.tips-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tip-item {
  display: flex;
  gap: 12px;
}

.tip-num {
  width: 24px;
  height: 24px;
  background-color: rgba(13, 148, 136, 0.08);
  color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  flex-shrink: 0;
}

.tip-content-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--dark-color);
  margin-bottom: 4px;
}

.tip-content-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Sidebar download CTA widget */
.cta-widget {
  background: var(--primary-gradient);
  color: #ffffff;
  border: none;
}

.cta-widget .sidebar-widget-title {
  color: #ffffff;
  border-bottom-color: rgba(255, 255, 255, 0.3);
}

.cta-widget-desc {
  font-size: 0.9rem;
  opacity: 0.9;
  margin-bottom: 24px;
  line-height: 1.6;
}

.cta-widget-btn {
  width: 100%;
  color: var(--primary-color);
  background-color: #ffffff;
}

.cta-widget-btn:hover {
  background-color: var(--light-bg);
  transform: translateY(-2px);
  box-shadow: 0 10px 15px rgba(0,0,0,0.1);
}

/* Sidebar stats badge board */
.sidebar-status-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-status-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.sidebar-status-label {
  color: var(--text-muted);
}

.sidebar-status-val {
  font-weight: 700;
  color: var(--dark-color);
}

.sidebar-status-val.green {
  color: var(--accent-color);
}

/* --- Global Footer Section --- */
.footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 60px 0 40px 0;
  border-top: 1px solid #1e293b;
  font-size: 0.9rem;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid #1e293b;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.4rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 20px;
}

.footer-desc {
  line-height: 1.7;
}

.footer-col-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-link-item:hover {
  color: #ffffff;
}

.footer-bottom {
  text-align: center;
}

.footer-security-claim {
  color: #10b981;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.footer-copyright {
  font-size: 0.8rem;
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  .hero-grid, .dl-main-grid, .feature-row, .magazine-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-img-wrap {
    transform: none;
  }
  .hero-img-wrap:hover {
    transform: none;
  }
  
  .feature-row.reverse {
    direction: ltr;
  }
  
  .highlights-grid, .platform-dedicated-grid, .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .platform-quick-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .install-tabs {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }
  
  .install-tab-btn.active::after {
    display: none;
  }
  
  .install-step {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .sec-guarantee-card {
    grid-template-columns: 1fr;
  }
  
  .sec-right-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 480px) {
  .highlights-grid, .platform-quick-grid, .platform-dedicated-grid, .reviews-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-ctas {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}