/* ========================================
   Telegram 中文版下载网站 - 主样式文件
   ======================================== */

/* CSS Variables */
:root {
  --primary: #0088cc;
  --primary-dark: #0066aa;
  --accent: #2AABEE;
  --accent-glow: #25D4C8;
  --bg-dark: #17212B;
  --bg-darker: #0f1620;
  --bg-light: #f8fafc;
  --bg-card: #ffffff;
  --text-dark: #1a1a2e;
  --text-light: #ffffff;
  --text-muted: #6b7280;
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --border: #e5e7eb;
  --shadow: 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-glow: 0 0 30px rgba(0, 136, 204, 0.3);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background: var(--bg-light);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

input, textarea {
  font-family: inherit;
  outline: none;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-dark);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

@media (max-width: 768px) {
  h1 { font-size: 2.25rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.25rem; }
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.98);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.25rem;
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  position: relative;
  font-weight: 500;
  color: var(--text-dark);
  padding: 5px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 5px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 15px;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  overflow: hidden;
  padding-top: 70px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(0, 136, 204, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(42, 171, 238, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(37, 212, 200, 0.05) 0%, transparent 70%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 136, 204, 0.2);
  border: 1px solid rgba(0, 136, 204, 0.3);
  padding: 8px 16px;
  border-radius: 50px;
  color: var(--accent);
  font-size: 0.875rem;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease-out;
}

.hero-title {
  color: var(--text-light);
  font-size: 3.5rem;
  margin-bottom: 20px;
  animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.25rem;
  margin-bottom: 40px;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease-out 0.3s both;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  box-shadow: 0 4px 15px rgba(0, 136, 204, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 136, 204, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

/* Hero Stats */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

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

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 5px;
}

.stat-label {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}

/* ========================================
   SECTIONS
   ======================================== */
.section {
  padding: 100px 0;
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-light);
}

.section-gray {
  background: #f1f5f9;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 60px;
}

.section-header h2 {
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
}

.section-dark .section-header p {
  color: rgba(255, 255, 255, 0.7);
}

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

.feature-card {
  background: var(--bg-card);
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 136, 204, 0.2);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(0, 136, 204, 0.1), rgba(42, 171, 238, 0.1));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   DOWNLOAD CARDS
   ======================================== */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.download-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.download-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.download-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 136, 204, 0.2);
}

.download-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--bg-light), #e2e8f0);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
}

.download-card h3 {
  margin-bottom: 8px;
}

.download-version {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: 20px;
}

.download-btn {
  width: 100%;
}

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

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  font-size: 1.0625rem;
  font-weight: 600;
  text-align: left;
  color: var(--text-dark);
  transition: var(--transition);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease;
  color: var(--primary);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

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

.faq-answer-content {
  padding: 0 24px 20px;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* ========================================
   TIMELINE
   ======================================== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -33px;
  top: 5px;
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid white;
  box-shadow: 0 0 0 3px var(--primary);
}

.timeline-year {
  color: var(--primary);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.timeline-content {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.timeline-content h4 {
  margin-bottom: 8px;
}

.timeline-content p {
  color: var(--text-muted);
}

/* ========================================
   CONTACT FORM
   ======================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact-form {
  background: var(--bg-card);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 14px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 136, 204, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-card {
  background: var(--bg-card);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  flex-shrink: 0;
}

.contact-info-card h4 {
  margin-bottom: 4px;
}

.contact-info-card p {
  color: var(--text-muted);
}

@media (max-width: 992px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: 24px;
  }
}

/* ========================================
   BREADCRUMB
   ======================================== */
.breadcrumb {
  padding: 20px 0;
  margin-top: 70px;
  background: var(--bg-light);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb-list a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--border);
}

/* ========================================
   PAGE HEADER
   ======================================== */
.page-header {
  padding: 60px 0;
  background: linear-gradient(135deg, var(--bg-dark), #1e3a5f);
  text-align: center;
  color: var(--text-light);
}

.page-header h1 {
  color: var(--text-light);
  margin-bottom: 16px;
}

.page-header p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   TABS
   ======================================== */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 30px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 2px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 24px;
  background: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
}

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

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

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========================================
   VERSION TABLE
   ======================================== */
.version-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.version-table th,
.version-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.version-table th {
  background: var(--bg-light);
  font-weight: 600;
  color: var(--text-dark);
}

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

.version-table tr:hover td {
  background: rgba(0, 136, 204, 0.02);
}

/* ========================================
   TEAM GRID
   ======================================== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  text-align: center;
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.team-avatar {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--bg-light), #e2e8f0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  color: var(--text-muted);
}

.team-info {
  padding: 24px;
}

.team-info h4 {
  margin-bottom: 4px;
}

.team-role {
  color: var(--primary);
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.team-bio {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ========================================
   SOCIAL LINKS
   ======================================== */
.social-links {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.social-link {
  width: 40px;
  height: 40px;
  background: var(--bg-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.25rem;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-3px);
}

/* ========================================
   PARTNERS GRID
   ======================================== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 30px;
}

.partner-logo {
  background: var(--bg-card);
  padding: 30px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.partner-logo:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.partner-logo span {
  font-size: 1.5rem;
  color: var(--text-muted);
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  padding: 80px 0;
  text-align: center;
  color: white;
}

.cta-section h2 {
  color: white;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: 32px;
}

.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-section .btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
}

.cta-section .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--bg-darker);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: white;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.footer-brand p {
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-links h4 {
  color: white;
  font-size: 1rem;
  margin-bottom: 20px;
}

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

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

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-social {
  display: flex;
  gap: 12px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--primary);
  transform: translateY(-3px);
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ========================================
   UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-accent { color: var(--accent); }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }

/* Alert */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ========================================
   ANIMATIONS
   ======================================== */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Floating Animation */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.floating {
  animation: float 3s ease-in-out infinite;
}

/* ========================================
   SEARCH BOX
   ======================================== */
.search-box {
  max-width: 500px;
  margin: 0 auto 40px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 16px 20px 16px 50px;
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 1rem;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.search-box::before {
  content: '\1F50D';
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
}

/* ========================================
   TOOLTIPS
   ======================================== */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 12px;
  background: var(--bg-dark);
  color: white;
  font-size: 0.75rem;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  bottom: calc(100% + 8px);
}

/* ========================================
   CHANGELOG
   ======================================== */
.changelog-list {
  max-width: 800px;
  margin: 0 auto;
}

.changelog-item {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.changelog-date {
  flex-shrink: 0;
  width: 100px;
  text-align: center;
}

.changelog-date .day {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.changelog-date .month {
  font-size: 0.875rem;
  color: var(--text-muted);
}

.changelog-content h4 {
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.badge {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-new {
  background: rgba(34, 197, 94, 0.1);
  color: var(--success);
}

.badge-fix {
  background: rgba(59, 130, 246, 0.1);
  color: #3b82f6;
}

.badge-update {
  background: rgba(245, 158, 11, 0.1);
  color: var(--warning);
}

.changelog-content p {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* ========================================
   SYSTEM REQUIREMENTS TABLE
   ======================================== */
.sys-req-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.sys-req-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: var(--shadow);
}

.sys-req-card h3 {
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--border);
}

.sys-req-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.sys-req-item:last-child {
  border-bottom: none;
}

.sys-req-label {
  color: var(--text-muted);
}

.sys-req-value {
  font-weight: 600;
}

/* ========================================
   LOADING SPINNER
   ======================================== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ========================================
   FEATURE LIST (for features page)
   ======================================== */
.feature-detail-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
  margin-bottom: 30px;
}

.feature-detail-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.feature-detail-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  flex-shrink: 0;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
}

.feature-list-item::before {
  content: '\2713';
  color: var(--success);
  font-weight: bold;
}

@media (max-width: 768px) {
  .feature-list {
    grid-template-columns: 1fr;
  }
  
  .feature-detail-card {
    padding: 24px;
  }
}

/* ========================================
   SECURITY BADGE
   ======================================== */
.security-badges {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
}

.security-badge {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  border-radius: 50px;
  color: var(--success);
  font-weight: 600;
  font-size: 0.875rem;
}

.security-badge::before {
  content: '\1F512';
}