/* WPS Office Official Inspired Style Sheet - Download Landing Page */

/* CSS Reset & Variables */
:root {
  --primary-color: #E13915; /* WPS Brand Orange-Red */
  --primary-hover: #C52F10;
  --secondary-color: #0F172A; /* Slate 900 */
  --text-main: #1E293B; /* Slate 800 */
  --text-muted: #64748B; /* Slate 500 */
  --text-light: #94A3B8; /* Slate 400 */
  --bg-main: #FFFFFF;
  --bg-soft: #F8FAFC; /* Slate 50 */
  --bg-dark: #0F172A;
  --border-color: #E2E8F0; /* Slate 200 */
  --success-color: #10B981; /* Emerald 500 */
  --success-light: #D1FAE5;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-family: var(--font-family);
  color: var(--text-main);
  background-color: var(--bg-main);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
}

/* Header & Navigation */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 800;
  font-size: 20px;
  color: var(--secondary-color);
  letter-spacing: -0.5px;
}

.logo-icon-container {
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  background: linear-gradient(135deg, #FF6A00 0%, #E13915 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 10px 18px;
  color: var(--text-main);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary-color);
  background-color: var(--bg-soft);
}

.nav-link.active {
  color: var(--primary-color);
  background-color: rgba(225, 57, 21, 0.08);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  font-weight: 700;
  font-size: 14px;
  border-radius: 8px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  transition: var(--transition);
  box-shadow: 0 4px 10px rgba(225, 57, 21, 0.2);
}

.nav-cta:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

/* Global Grid and Containers */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 56px auto;
}

.section-tag {
  display: inline-block;
  padding: 6px 14px;
  background-color: rgba(225, 57, 21, 0.08);
  color: var(--primary-color);
  font-size: 13px;
  font-weight: 700;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--secondary-color);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  outline: none;
  user-select: none;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(225, 57, 21, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(225, 57, 21, 0.35);
}

.btn-secondary {
  background-color: var(--bg-soft);
  color: var(--text-main);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #E2E8F0;
  color: var(--secondary-color);
  transform: translateY(-2px);
}

.btn-dark {
  background-color: var(--secondary-color);
  color: #FFFFFF;
}

.btn-dark:hover {
  background-color: #1E293B;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

/* Hero Section */
.hero-section {
  background: radial-gradient(100% 100% at 50% 0%, rgba(225, 57, 21, 0.04) 0%, rgba(255,255,255,0) 100%), var(--bg-soft);
  border-bottom: 1px solid var(--border-color);
  overflow: hidden;
  position: relative;
}

.hero-container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 48px;
  padding: 100px 24px;
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.hero-badge-tag {
  background-color: var(--primary-color);
  color: #FFFFFF;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 6px;
  border-radius: 4px;
}

.hero-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--secondary-color);
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.hero-title span {
  color: var(--primary-color);
}

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

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-cta-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-cta-meta {
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 16px;
}

.hero-cta-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

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

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 500px;
  filter: drop-shadow(0 25px 50px rgba(0,0,0,0.12));
}

.hero-image-svg {
  width: 100%;
  height: auto;
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.feature-card {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 36px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: var(--primary-color);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(225, 57, 21, 0.2);
}

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

.feature-icon-wrapper {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 12px;
  margin-bottom: 24px;
  transition: var(--transition);
}

/* Custom specific background colors for feature types */
.icon-word { background-color: rgba(10, 106, 217, 0.08); color: #0A6AD9; }
.icon-excel { background-color: rgba(16, 124, 65, 0.08); color: #107C41; }
.icon-ppt { background-color: rgba(216, 59, 1, 0.08); color: #D83B01; }
.icon-pdf { background-color: rgba(225, 57, 21, 0.08); color: #E13915; }
.icon-cloud { background-color: rgba(6, 182, 212, 0.08); color: #06B6D4; }
.icon-ai { background-color: rgba(139, 92, 246, 0.08); color: #8B5CF6; }
.icon-template { background-color: rgba(245, 158, 11, 0.08); color: #F59E0B; }
.icon-collab { background-color: rgba(236, 72, 153, 0.08); color: #EC4899; }
.icon-security { background-color: rgba(16, 185, 129, 0.08); color: #10B981; }

.feature-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 12px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Multiplatform download entry section */
.platform-section {
  background-color: var(--bg-soft);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

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

.platform-card {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.platform-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-color);
}

.platform-icon {
  width: 56px;
  height: 56px;
  color: var(--text-main);
  margin-bottom: 20px;
  transition: var(--transition);
}

.platform-card:hover .platform-icon {
  transform: scale(1.1);
  color: var(--primary-color);
}

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

.platform-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
  height: 38px;
  overflow: hidden;
}

.platform-btn {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  font-weight: 700;
  border-radius: 8px;
  margin-top: auto;
}

/* Product Detail Sections (Alternating) */
.details-section {
  background-color: var(--bg-main);
}

.details-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 80px;
  align-items: center;
  padding: 60px 0;
}

.details-row:nth-child(even) {
  direction: rtl;
}

.details-row:nth-child(even) .details-content {
  direction: ltr;
}

.details-visual {
  display: flex;
  justify-content: center;
  position: relative;
}

.details-image-container {
  width: 100%;
  max-width: 480px;
  background-color: var(--bg-soft);
  border-radius: 20px;
  padding: 24px;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.details-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 20px;
  line-height: 1.3;
}

.details-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

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

.details-list-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.details-list-icon {
  width: 20px;
  height: 20px;
  color: var(--success-color);
  flex-shrink: 0;
  margin-top: 3px;
}

.details-list-text {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
}

/* Stats Section */
.stats-section {
  background: linear-gradient(135deg, var(--secondary-color) 0%, #1E293B 100%);
  color: #FFFFFF;
}

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

.stat-item {
  padding: 20px;
}

.stat-num {
  font-size: 48px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #FF9E6A 0%, #FF6B4A 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-title {
  font-size: 16px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 8px;
}

.stat-desc {
  font-size: 13px;
  color: var(--text-light);
}

/* Comparison Table */
.comparison-container {
  overflow-x: auto;
  border: 1px solid var(--border-color);
  border-radius: 16px;
  background-color: var(--bg-main);
  box-shadow: var(--shadow-md);
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comp-table th, .comp-table td {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-color);
}

.comp-table th {
  background-color: var(--bg-soft);
  font-weight: 700;
  font-size: 16px;
  color: var(--secondary-color);
}

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

.comp-table th:nth-child(2) {
  width: 30%;
  background-color: rgba(225, 57, 21, 0.03);
  border-left: 2px solid rgba(225, 57, 21, 0.1);
  border-right: 2px solid rgba(225, 57, 21, 0.1);
}

.comp-table td:nth-child(2) {
  background-color: rgba(225, 57, 21, 0.01);
  border-left: 2px solid rgba(225, 57, 21, 0.05);
  border-right: 2px solid rgba(225, 57, 21, 0.05);
  font-weight: 600;
}

.comp-feature-info {
  display: flex;
  flex-direction: column;
}

.comp-feature-name {
  font-weight: 700;
  color: var(--secondary-color);
  font-size: 15px;
}

.comp-feature-desc {
  font-size: 13px;
  color: var(--text-muted);
}

.comp-status-icon {
  width: 22px;
  height: 22px;
  display: inline-block;
  vertical-align: middle;
}

.comp-status-yes {
  color: var(--success-color);
}

.comp-status-no {
  color: var(--text-light);
}

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

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

.review-card {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(225, 57, 21, 0.15);
}

.review-rating {
  display: flex;
  gap: 4px;
  color: #F59E0B; /* Amber 500 */
  margin-bottom: 16px;
}

.review-star {
  width: 18px;
  height: 18px;
}

.review-content {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.6;
  margin-bottom: 24px;
  font-style: italic;
  flex-grow: 1;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
}

.review-avatar-svg {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background-color: var(--bg-soft);
}

.review-user-info {
  display: flex;
  flex-direction: column;
}

.review-user-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--secondary-color);
}

.review-user-role {
  font-size: 12px;
  color: var(--text-muted);
}

/* FAQ Accordion Section */
.faq-section {
  background-color: var(--bg-soft);
  border-top: 1px solid var(--border-color);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(225, 57, 21, 0.3);
  box-shadow: var(--shadow-sm);
}

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

.faq-question:hover {
  background-color: rgba(0, 0, 0, 0.01);
}

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

.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: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 0 solid var(--border-color);
}

/* Active FAQ Item states */
.faq-item.active {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

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

.faq-item.active .faq-answer {
  max-height: 1000px; /* arbitrary high value for flexible height expansion */
  padding: 16px 24px 24px 24px;
  border-top-width: 1px;
  transition: max-height 0.3s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
}

/* --- DOWNLOAD PAGE STYLE --- */

/* Main Download Hero Area */
.download-hero {
  background: radial-gradient(120% 120% at 50% 10%, rgba(225, 57, 21, 0.05) 0%, rgba(255,255,255,0) 100%);
  padding: 80px 24px 60px 24px;
  border-bottom: 1px solid var(--border-color);
}

.download-hero-card {
  max-width: 900px;
  margin: 0 auto;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  padding: 48px;
  box-shadow: var(--shadow-xl);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.download-hero-info h1 {
  font-size: 36px;
  font-weight: 800;
  color: var(--secondary-color);
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.download-hero-info p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 24px;
}

.download-meta-tags {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.download-meta-tag {
  background-color: var(--bg-soft);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  font-weight: 600;
}

.download-btn-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.download-btn-large {
  font-size: 18px;
  padding: 16px 36px;
  border-radius: 12px;
}

.download-agreement-text {
  font-size: 12px;
  color: var(--text-light);
}

.download-hero-visual-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-left: 1px solid var(--border-color);
  padding-left: 40px;
}

.download-main-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(16, 185, 129, 0.08);
  color: var(--success-color);
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 700;
  margin-top: 16px;
}

/* Steps Guides */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  position: relative;
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.step-number {
  position: absolute;
  top: -15px;
  left: 24px;
  width: 36px;
  height: 36px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 4px 8px rgba(225, 57, 21, 0.3);
}

.step-visual-mini {
  margin-top: 12px;
  height: 100px;
  border: 1px dashed var(--border-color);
  border-radius: 8px;
  background-color: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--secondary-color);
  margin: 12px 0 8px 0;
}

.step-card-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* Spec List Styling */
.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.spec-category {
  background-color: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.spec-category-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--secondary-color);
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 12px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.spec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.spec-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  font-size: 14px;
  line-height: 1.5;
}

.spec-label {
  font-weight: 700;
  color: var(--text-muted);
}

.spec-value {
  color: var(--text-main);
}

/* Version Updates/Changelogs */
.changelog-timeline {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 32px;
}

.changelog-timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 7px;
  width: 2px;
  height: calc(100% - 24px);
  background-color: var(--border-color);
}

.changelog-item {
  position: relative;
  margin-bottom: 40px;
}

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

.changelog-dot {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--primary-color);
  border: 4px solid var(--bg-main);
  box-shadow: 0 0 0 2px rgba(225, 57, 21, 0.2);
}

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

.changelog-version {
  font-size: 18px;
  font-weight: 800;
  color: var(--secondary-color);
}

.changelog-date {
  font-size: 13px;
  color: var(--text-light);
  font-weight: 500;
}

.changelog-tag {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--success-color);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
}

.changelog-list {
  list-style: none;
  background-color: var(--bg-soft);
  border: 1px solid var(--border-color);
  padding: 20px;
  border-radius: 12px;
}

.changelog-list-item {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  color: var(--text-main);
  margin-bottom: 8px;
}

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

.changelog-list-item::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

/* Safety banner on download */
.safety-banner {
  background-color: #ECFDF5; /* Emerald 50 */
  border: 1px solid #A7F3D0; /* Emerald 200 */
  border-radius: 16px;
  padding: 30px;
  display: flex;
  gap: 20px;
  align-items: center;
  max-width: 900px;
  margin: 0 auto;
}

.safety-icon {
  width: 48px;
  height: 48px;
  color: var(--success-color);
  flex-shrink: 0;
}

.safety-content h3 {
  font-size: 16px;
  font-weight: 700;
  color: #065F46; /* Emerald 800 */
  margin-bottom: 4px;
}

.safety-content p {
  font-size: 13px;
  color: #047857; /* Emerald 700 */
}

/* --- SEO INFO & Soft Sell Layout (zh-cn) --- */
.seo-intro-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: flex-start;
}

.seo-rich-text h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--secondary-color);
  margin-top: 36px;
  margin-bottom: 16px;
}

.seo-rich-text h2:first-of-type {
  margin-top: 0;
}

.seo-rich-text p {
  font-size: 15px;
  color: var(--text-main);
  line-height: 1.8;
  margin-bottom: 20px;
}

.seo-rich-text strong {
  color: var(--secondary-color);
}

.seo-sticky-sidebar {
  position: sticky;
  top: 104px;
  background-color: var(--bg-soft);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 36px;
}

.seo-cta-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 12px;
}

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

.seo-sidebar-links {
  list-style: none;
  margin-top: 24px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

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

.seo-sidebar-links a {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.seo-sidebar-links a:hover {
  color: var(--primary-color);
  transform: translateX(3px);
}

/* --- FOOTER CONTENT --- */
footer {
  background-color: var(--bg-dark);
  color: #F8FAFC;
  border-top: 1px solid #1E293B;
}

.footer-top {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
}

.footer-brand-info {
  max-width: 360px;
}

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

.footer-desc {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

.footer-links-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links-list a {
  font-size: 14px;
  color: var(--text-light);
  text-decoration: none;
  transition: var(--transition);
}

.footer-links-list a:hover {
  color: #FFFFFF;
  padding-left: 3px;
}

.footer-bottom {
  border-top: 1px solid #1E293B;
  background-color: #090D16;
  padding: 30px 24px;
}

.footer-bottom-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.footer-bottom-safety {
  font-size: 13px;
  font-weight: 600;
  color: var(--success-color);
  background-color: rgba(16, 185, 129, 0.1);
  padding: 6px 16px;
  border-radius: 100px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-copyright {
  font-size: 12px;
  color: var(--text-light);
  max-width: 800px;
  line-height: 1.7;
}

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

/* Media Queries (Responsive) */
@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
    padding: 60px 24px;
  }
  .hero-content {
    max-width: 100%;
    margin: 0 auto;
  }
  .hero-badge, .hero-cta-meta {
    justify-content: center;
  }
  .hero-cta-buttons {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .details-row {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  .details-row:nth-child(even) {
    direction: ltr;
  }
  .details-image-container {
    margin: 0 auto;
  }
  .details-list-item {
    justify-content: center;
    text-align: left;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .download-hero-card {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px;
  }
  .download-hero-visual-box {
    border-left: none;
    padding-left: 0;
    border-top: 1px solid var(--border-color);
    padding-top: 32px;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .spec-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .seo-intro-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .seo-sticky-sidebar {
    position: static;
  }
}

@media (max-width: 640px) {
  .nav-container {
    padding: 0 16px;
    height: 64px;
  }
  .logo-text {
    font-size: 18px;
  }
  .nav-cta {
    padding: 8px 14px;
    font-size: 13px;
  }
  .hero-title {
    font-size: 34px;
  }
  .hero-desc {
    font-size: 16px;
  }
  .container {
    padding: 48px 16px;
  }
  .section-title {
    font-size: 28px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .platform-grid {
    grid-template-columns: 1fr;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 16px;
  }
}