/* Custom WPS Landing Page CSS - Professional, modern design with an elegant deep-indigo and arctic-cyan palette */

:root {
  --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #06b6d4 100%);
  --secondary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --coral-gradient: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
  --dark-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --secondary: #06b6d4;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --light: #f8fafc;
  --border: #e2e8f0;
  --text-main: #334155;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --accent: #ff4b2b;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 20px -2px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Global Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: #ffffff;
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

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

/* Base Layout Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-spacing {
  padding: 80px 0;
}

.section-title-wrap {
  text-align: center;
  margin-bottom: 50px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--primary);
  background-color: rgba(79, 70, 229, 0.08);
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-muted);
}

/* Header & Glassmorphism Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  z-index: 1000;
  transition: var(--transition);
}

.header-scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

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

.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
}

.logo-icon {
  width: 36px;
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  padding: 8px 18px;
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--primary);
  background-color: rgba(79, 70, 229, 0.04);
}

/* Nav Link Active State - Beautiful pill style with gradient accent */
.nav-link.active {
  color: #ffffff;
  background: var(--primary-gradient);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.header-cta-btn {
  display: inline-flex;
  align-items: center;
  background: var(--coral-gradient);
  color: #ffffff;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 50px;
  box-shadow: 0 4px 12px rgba(255, 75, 43, 0.2);
  transition: var(--transition);
}

.header-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 75, 43, 0.3);
}

/* Hero Section */
.hero {
  position: relative;
  background: radial-gradient(circle at top right, rgba(6, 182, 212, 0.08) 0%, rgba(79, 70, 229, 0.04) 50%, rgba(255, 255, 255, 0) 100%);
  padding-top: 160px;
  padding-bottom: 100px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 15%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.05) 0%, transparent 70%);
  z-index: -1;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1s 0.9s;
  align-items: center;
  gap: 50px;
}

@media (max-width: 968px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.hero-content {
  max-width: 620px;
}

@media (max-width: 968px) {
  .hero-content {
    margin: 0 auto;
  }
}

.hero-title {
  font-size: 48px;
  font-weight: 850;
  line-height: 1.15;
  color: var(--text-dark);
  letter-spacing: -1px;
  margin-bottom: 20px;
}

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

.hero-desc {
  font-size: 19px;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.6;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 30px;
}

@media (max-width: 968px) {
  .hero-cta-group {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 32px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: var(--primary-gradient);
  color: #ffffff;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(79, 70, 229, 0.35);
}

.btn-secondary {
  background-color: #ffffff;
  color: var(--text-dark);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background-color: var(--light);
  border-color: #cbd5e1;
  transform: translateY(-2px);
}

.hero-badge-row {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 968px) {
  .hero-badge-row {
    justify-content: center;
  }
}

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

.badge-icon {
  width: 16px;
  height: 16px;
  color: #10b981;
}

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

.hero-card-stack {
  position: relative;
  width: 100%;
  max-width: 460px;
  height: 340px;
}

.hero-card {
  position: absolute;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
}

.hero-card-1 {
  background: var(--dark-gradient);
  width: 90%;
  height: 85%;
  top: 0;
  left: 0;
  z-index: 1;
  padding: 24px;
  color: #ffffff;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-card-2 {
  background: #ffffff;
  width: 85%;
  height: 80%;
  bottom: 0;
  right: 0;
  z-index: 2;
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Core Highlights Cards Grid */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

@media (max-width: 968px) {
  .highlights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .highlights-grid {
    grid-template-columns: 1fr;
  }
}

.highlight-card {
  background-color: #ffffff;
  border: 1px solid #f1f5f9;
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

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

.highlight-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79, 70, 229, 0.1);
}

.highlight-card:hover::before {
  height: 100%;
}

.highlight-icon-wrap {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(79, 70, 229, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary);
  transition: var(--transition);
}

.highlight-card:hover .highlight-icon-wrap {
  background: var(--primary-gradient);
  color: #ffffff;
}

.highlight-title {
  font-size: 20px;
  font-weight: 750;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.highlight-desc {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Multi-Platform Showcase Downloads */
.platforms-section {
  background-color: var(--light);
}

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

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

@media (max-width: 540px) {
  .platforms-grid {
    grid-template-columns: 1fr;
  }
}

.platform-card {
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(6, 182, 212, 0.3);
}

.platform-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  color: var(--text-dark);
}

.platform-card.win .platform-icon { color: #0078d7; }
.platform-card.mac .platform-icon { color: #000000; }
.platform-card.ios .platform-icon { color: #007aff; }
.platform-card.android .platform-icon { color: #3ddc84; }

.platform-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.platform-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.platform-btn {
  width: 100%;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  background-color: var(--light);
  color: var(--text-dark);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.platform-card:hover .platform-btn {
  background: var(--primary-gradient);
  color: #ffffff;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.2);
}

/* Detailed Product Feature Sections (Alternate rows) */
.detailed-feature-row {
  display: flex;
  align-items: center;
  gap: 60px;
  margin-bottom: 100px;
}

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

.detailed-feature-row:nth-child(even) {
  flex-direction: row-reverse;
}

@media (max-width: 968px) {
  .detailed-feature-row, .detailed-feature-row:nth-child(even) {
    flex-direction: column;
    gap: 40px;
    margin-bottom: 70px;
  }
}

.detailed-feature-media {
  flex: 1;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--dark-gradient);
  padding: 24px;
  color: #ffffff;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.detailed-feature-content {
  flex: 1.1;
}

.detailed-feature-num {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
}

.detailed-feature-title {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  line-height: 1.3;
}

.detailed-feature-desc {
  font-size: 15.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.detailed-feature-checklist {
  list-style: none;
}

.detailed-feature-checklist-item {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-weight: 600;
  color: var(--text-dark);
}

.detailed-feature-checklist-icon {
  width: 18px;
  height: 18px;
  color: var(--secondary);
}

/* User Reviews Area */
.reviews-section {
  background-color: var(--light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

@media (max-width: 968px) {
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

.review-card {
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-sm);
  border: 1px solid #f1f5f9;
  transition: var(--transition);
}

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

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

.reviewer-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.reviewer-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 16px;
}

.reviewer-name {
  font-weight: 700;
  color: var(--text-dark);
  font-size: 15px;
}

.reviewer-title {
  font-size: 12px;
  color: var(--text-muted);
}

.stars-container {
  display: flex;
  gap: 2px;
  color: #f59e0b;
}

.star-icon {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.review-text {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.6;
  font-style: italic;
}

/* Global Statistics Showcase */
.stats-section {
  background: var(--dark-gradient);
  color: #ffffff;
}

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

@media (max-width: 868px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.stat-item {
  padding: 10px;
}

.stat-num {
  font-size: 40px;
  font-weight: 850;
  color: #ffffff;
  background: linear-gradient(135deg, #ffffff 0%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  font-weight: 600;
  color: #94a3b8;
  letter-spacing: 0.5px;
}

/* Software Comparison Matrix */
.comparison-container {
  overflow-x: auto;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background: #ffffff;
  min-width: 700px;
}

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

.comparison-table th {
  background-color: #f8fafc;
  font-weight: 700;
  color: var(--text-dark);
  font-size: 15px;
}

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

.comparison-table td:first-child {
  font-weight: 700;
  color: var(--text-dark);
}

.feature-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

.feature-tag-yes {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
}

.feature-tag-no {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.feature-highlight {
  color: var(--primary);
  font-weight: 700;
}

/* Rich FAQ Area Styling */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

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

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-question {
  padding: 20px 24px;
  font-weight: 700;
  font-size: 16px;
  color: var(--text-dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.faq-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  transition: var(--transition);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
  padding: 0 24px;
  font-size: 14.5px;
  color: var(--text-main);
  line-height: 1.7;
}

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

.faq-item.open .faq-answer {
  max-height: 1000px; /* arbitrary large value for smooth auto transition */
  padding-bottom: 24px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
}

/* === DOWNLOAD PAGE STYLING === */
.download-hero {
  background: radial-gradient(circle at bottom, rgba(79, 70, 229, 0.06) 0%, rgba(255, 255, 255, 0) 100%), #ffffff;
  padding-top: 150px;
  padding-bottom: 70px;
}

.primary-dl-card {
  max-width: 850px;
  margin: 0 auto;
  background: var(--dark-gradient);
  border-radius: var(--radius-lg);
  color: #ffffff;
  padding: 50px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

@media (max-width: 640px) {
  .primary-dl-card {
    padding: 30px 20px;
  }
}

.primary-dl-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.primary-dl-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 30px;
}

@media (max-width: 640px) {
  .primary-dl-header {
    flex-direction: column;
    text-align: center;
  }
}

.primary-dl-logo {
  width: 64px;
  height: 64px;
}

.primary-dl-meta h1 {
  font-size: 28px;
  font-weight: 850;
}

.primary-dl-meta p {
  color: #94a3b8;
  font-size: 14px;
}

.primary-dl-body {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

@media (max-width: 768px) {
  .primary-dl-body {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

.primary-dl-bullet-list {
  list-style: none;
}

.primary-dl-bullet {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14.5px;
  color: #cbd5e1;
}

.primary-dl-bullet svg {
  width: 16px;
  height: 16px;
  color: var(--secondary);
}

.primary-dl-btn-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
  text-align: center;
}

.btn-large-dl {
  background: var(--coral-gradient);
  color: #ffffff;
  padding: 18px 40px;
  font-size: 18px;
  font-weight: 700;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 25px rgba(255, 75, 43, 0.35);
}

.btn-large-dl:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(255, 75, 43, 0.45);
}

.btn-large-dl span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* Standalone Installer Guides */
.guide-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 50px;
  align-items: flex-start;
}

@media (max-width: 968px) {
  .guide-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

.guide-steps-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.guide-step-item {
  display: flex;
  gap: 20px;
  background: #ffffff;
  border: 1px solid var(--border);
  padding: 24px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.guide-step-item:hover {
  border-color: rgba(79, 70, 229, 0.2);
  box-shadow: var(--shadow-sm);
}

.guide-step-num {
  width: 32px;
  height: 32px;
  background: rgba(79, 70, 229, 0.1);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  flex-shrink: 0;
}

.guide-step-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 6px;
}

.guide-step-desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* System Spec Table Matrix */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

@media (max-width: 768px) {
  .spec-grid {
    grid-template-columns: 1fr;
  }
}

.spec-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.spec-card-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 20px;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.spec-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--border);
}

.spec-row:last-child {
  border-bottom: none;
}

.spec-lbl {
  color: var(--text-muted);
  font-weight: 600;
}

.spec-val {
  color: var(--text-dark);
  font-weight: 700;
}

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

.changelog-item {
  position: relative;
  padding-left: 36px;
  padding-bottom: 40px;
}

.changelog-item::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--primary);
  z-index: 2;
}

.changelog-item::after {
  content: '';
  position: absolute;
  top: 18px;
  left: 11px;
  width: 2px;
  height: 100%;
  background-color: var(--border);
  z-index: 1;
}

.changelog-item:last-child {
  padding-bottom: 0;
}

.changelog-item:last-child::after {
  display: none;
}

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

.changelog-ver {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-dark);
}

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

.changelog-tag {
  background-color: rgba(6, 182, 212, 0.1);
  color: var(--secondary);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
}

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

.changelog-bullet-item {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 8px;
}

.changelog-bullet-item::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary);
}

/* Security Guarantee Section */
.security-banner {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
}

.security-icon {
  width: 54px;
  height: 54px;
  color: #10b981;
  margin-bottom: 16px;
}

/* === ZH-CN SEO PAGE STYLING === */
.seo-layout {
  padding-top: 150px;
}

.magazine-grid {
  display: grid;
  grid-template-columns: 2.1fr 0.9fr;
  gap: 40px;
  align-items: flex-start;
}

@media (max-width: 968px) {
  .magazine-grid {
    grid-template-columns: 1fr;
  }
}

.magazine-article {
  background: #ffffff;
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

@media (max-width: 640px) {
  .magazine-article {
    padding: 24px 16px;
  }
}

.article-header {
  margin-bottom: 30px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.article-title {
  font-size: 28px;
  font-weight: 850;
  color: var(--text-dark);
  line-height: 1.3;
}

.article-content {
  font-size: 15px;
  color: var(--text-main);
  line-height: 1.8;
}

.article-content p {
  margin-bottom: 20px;
}

.article-section-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  margin: 32px 0 16px 0;
  border-bottom: 2px solid var(--light);
  padding-bottom: 8px;
}

.keyword-highlight {
  font-weight: 700;
  color: var(--primary);
  border-bottom: 1px dashed var(--primary);
}

.tip-card-mini {
  background: var(--light);
  border-left: 4px solid var(--secondary);
  padding: 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
}

.cta-box-full {
  text-align: center;
  margin: 40px 0;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.08) 0%, transparent 70%);
  padding: 40px 24px;
  border-radius: var(--radius-md);
}

.cta-box-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.cta-box-desc {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

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

.sidebar-widget {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.widget-title {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-dark);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

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

.widget-tip-item {
  font-size: 13.5px;
}

.widget-tip-title {
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.widget-tip-desc {
  color: var(--text-muted);
}

/* Unified Footer Styling */
.footer {
  background-color: #0b0f19;
  color: #64748b;
  padding: 60px 0 40px 0;
  border-top: 1px solid #1e293b;
  font-size: 13px;
  line-height: 1.8;
}

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

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #ffffff;
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 20px;
}

.footer-disclaimer {
  max-width: 800px;
  margin: 0 auto 24px auto;
  color: #475569;
}

.footer-safe-line {
  color: #10b981;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.footer-copyright {
  border-top: 1px solid #111827;
  padding-top: 24px;
  margin-top: 24px;
  color: #475569;
}

/* Spin Animation Keyframes */
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}