:root {
  --primary: #00d4ff;
  --secondary: #7b2ff7;
  --accent: #00ff88;
  --bg-dark: #0a0e17;
  --bg-card: #131a2b;
  --bg-card-hover: #1a2235;
  --text-primary: #e8eaed;
  --text-secondary: #8892a0;
  --border-color: rgba(0, 212, 255, 0.2);
  --glow-primary: 0 0 20px rgba(0, 212, 255, 0.3);
  --glow-secondary: 0 0 20px rgba(123, 47, 247, 0.3);
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

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

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
  background: var(--primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary);
}

.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: rgba(10, 14, 23, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 14, 23, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-logo svg {
  width: 32px;
  height: 32px;
  stroke: var(--primary);
}

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

.nav-links a {
  padding: 10px 18px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  background: rgba(0, 212, 255, 0.1);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.mobile-menu-btn {
  display: none;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-primary);
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 800px;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary);
  margin-bottom: 24px;
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.2); }
  50% { box-shadow: 0 0 30px rgba(0, 212, 255, 0.4); }
}

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

.hero-title {
  font-family: 'Orbitron', 'Rajdhani', sans-serif;
  font-size: 4rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 50%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--bg-dark);
  box-shadow: var(--glow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  border-color: var(--primary);
}

.particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--primary);
  border-radius: 50%;
  opacity: 0.6;
  animation: float 15s infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0) translateX(0); opacity: 0.6; }
  25% { transform: translateY(-100px) translateX(50px); opacity: 0.3; }
  50% { transform: translateY(-200px) translateX(-30px); opacity: 0.6; }
  75% { transform: translateY(-100px) translateX(-50px); opacity: 0.3; }
}

.features {
  padding: 100px 24px;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-family: 'Orbitron', 'Rajdhani', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 16px;
  transition: var(--transition);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--primary);
}

.feature-card:hover .feature-icon {
  background: rgba(0, 212, 255, 0.2);
  transform: scale(1.1);
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.articles {
  padding: 100px 24px;
  background: linear-gradient(180deg, var(--bg-dark), var(--bg-card));
}

.articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 24px;
}

.search-box {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.search-box input::placeholder { color: var(--text-secondary); }

.search-box svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  stroke: var(--text-secondary);
}

.category-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.category-tab {
  padding: 10px 20px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
}

.category-tab:hover,
.category-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-color: transparent;
  color: var(--bg-dark);
  font-weight: 600;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}

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

.article-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.article-card:hover .article-cover img { transform: scale(1.05); }

.article-category {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--bg-dark);
}

.article-content { padding: 24px; }

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

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

.article-author {
  display: flex;
  align-items: center;
  gap: 8px;
}

.article-author img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.article-author span {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.article-stats {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.article-stats span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.article-stats svg {
  width: 14px;
  height: 14px;
}

.stats {
  padding: 80px 24px;
  position: relative;
}

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

.stat-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.stat-number {
  font-family: 'Orbitron', sans-serif;
  font-size: 3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
}

.article-detail {
  max-width: 800px;
  margin: 0 auto;
  padding: 140px 24px 80px;
}

.article-detail-header { margin-bottom: 40px; }

.article-detail-category {
  display: inline-block;
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--bg-dark);
  margin-bottom: 20px;
}

.article-detail-title {
  font-family: 'Orbitron', 'Rajdhani', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 24px;
}

.article-detail-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--text-secondary);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
}

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

.article-detail-author img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.article-detail-author-info h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.article-detail-author-info span { font-size: 0.875rem; }

.article-detail-cover {
  width: 100%;
  height: 400px;
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 40px;
}

.article-detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-body {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body p { margin-bottom: 24px; }

.article-body h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 40px 0 20px;
  color: var(--primary);
}

.article-body ul,
.article-body ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.article-body li { margin-bottom: 12px; }

.article-body strong { color: var(--primary); }

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
}

.article-body table td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
}

.article-body table tr:nth-child(odd) td {
  background: rgba(0, 212, 255, 0.05);
}

.publish-page {
  max-width: 800px;
  margin: 0 auto;
  padding: 140px 24px 80px;
}

.publish-header { margin-bottom: 40px; }

.publish-title {
  font-family: 'Orbitron', 'Rajdhani', sans-serif;
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.publish-subtitle {
  color: var(--text-secondary);
  font-size: 1rem;
}

.publish-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 40px;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-label span { color: #ff4757; }

.form-input {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.form-input::placeholder { color: var(--text-secondary); }

.form-select {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238892a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 16px;
}

.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.upload-area {
  border: 2px dashed var(--border-color);
  border-radius: 12px;
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.upload-area:hover {
  border-color: var(--primary);
  background: rgba(0, 212, 255, 0.05);
}

.upload-area.dragover {
  border-color: var(--primary);
  background: rgba(0, 212, 255, 0.1);
}

.upload-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  stroke: var(--text-secondary);
}

.upload-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.upload-text strong { color: var(--primary); }

.upload-preview {
  display: none;
  margin-top: 16px;
}

.upload-preview img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 8px;
  object-fit: cover;
}

.upload-preview.show { display: block; }

.form-textarea {
  width: 100%;
  min-height: 300px;
  padding: 16px;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  line-height: 1.6;
  resize: vertical;
  transition: var(--transition);
}

.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.form-textarea::placeholder { color: var(--text-secondary); }

.form-actions {
  display: flex;
  gap: 16px;
  justify-content: flex-end;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
  padding: 60px 24px 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-brand { max-width: 300px; }

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Orbitron', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-logo svg {
  width: 28px;
  height: 28px;
  stroke: var(--primary);
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

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

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: var(--transition);
}

.footer-social a:hover {
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.footer-social svg {
  width: 20px;
  height: 20px;
  stroke: var(--text-secondary);
  transition: var(--transition);
}

.footer-social a:hover svg { stroke: var(--primary); }

.footer-links h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

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

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

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  transition: var(--transition);
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.toast-container {
  position: fixed;
  top: 90px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.toast {
  padding: 16px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 12px;
  animation: slideIn 0.3s ease-out;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.toast.success { border-color: var(--accent); }
.toast.error { border-color: #ff4757; }

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

.toast.success svg { stroke: var(--accent); }
.toast.error svg { stroke: #ff4757; }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0; }
}

.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 60px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

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

.empty-state {
  text-align: center;
  padding: 80px 24px;
  grid-column: 1 / -1;
}

.empty-state svg {
  width: 80px;
  height: 80px;
  stroke: var(--text-secondary);
  margin-bottom: 24px;
}

.empty-state h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  margin-bottom: 32px;
}

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

.back-btn svg { width: 18px; height: 18px; }

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

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: block; }
  
  .mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
    padding: 16px;
    z-index: 999;
  }
  
  .mobile-menu.open { display: block; }
  
  .mobile-menu a {
    display: block;
    padding: 14px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: var(--transition);
  }
  
  .mobile-menu a:hover,
  .mobile-menu a.active {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
  }
  
  .hero-title { font-size: 2.5rem; }
  .hero-subtitle { font-size: 1rem; }
  .features-grid { grid-template-columns: 1fr; }
  .articles-grid { grid-template-columns: 1fr; }
  
  .articles-header {
    flex-direction: column;
    align-items: stretch;
  }
  
  .search-box { max-width: 100%; }
  
  .stats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  
  .footer { padding: 40px 24px 20px; }
  
  .article-detail-title { font-size: 1.75rem; }
  .article-detail-cover { height: 250px; }
  .publish-form { padding: 24px; }
}

.hidden { display: none !important; }

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

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

/* 用户菜单样式 */
.nav-user {
  position: relative;
}

.user-menu-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 6px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid var(--border-color);
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition);
}

.user-menu-btn:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: var(--primary);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}

.user-name {
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

.user-menu-btn svg {
  stroke: var(--text-secondary);
}

.user-dropdown {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  min-width: 180px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  z-index: 1001;
}

.user-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  font-size: 0.9rem;
  transition: var(--transition);
}

.dropdown-item:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
}

.dropdown-item svg {
  stroke: currentColor;
}

.dropdown-item-danger:hover {
  background: rgba(255, 71, 87, 0.1);
  color: #ff4757;
}

/* 移动端用户信息 */
.mobile-user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 8px;
}

.mobile-user-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}

.mobile-user-details {
  display: flex;
  flex-direction: column;
}

.mobile-user-name {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1rem;
}

.mobile-user-email {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.mobile-logout {
  color: #ff4757 !important;
}

.form-hint {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-top: 4px;
}

/* 用户评价区域 */
.testimonials {
  padding: 100px 24px;
  background: var(--bg-card);
  position: relative;
  overflow: hidden;
}

.testimonials::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.testimonial-card {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.testimonial-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition);
}

.testimonial-card:hover {
  transform: translateY(-8px);
  border-color: var(--primary);
  box-shadow: var(--glow-primary);
}

.testimonial-card:hover::before {
  opacity: 1;
}

.testimonial-card:nth-child(2) {
  transform: translateY(24px);
}

.testimonial-card:nth-child(2):hover {
  transform: translateY(16px);
}

.testimonial-rating {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.testimonial-rating svg {
  width: 16px;
  height: 16px;
  fill: #ffa502;
  stroke: #ffa502;
}

.testimonial-text {
  color: var(--text-primary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
  position: relative;
  z-index: 1;
}

.testimonial-author img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border-color);
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
}

.author-role {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.testimonial-glow {
  position: absolute;
  bottom: -50px;
  right: -50px;
  width: 150px;
  height: 150px;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  transition: var(--transition);
}

.testimonial-card:hover .testimonial-glow {
  width: 200px;
  height: 200px;
  bottom: -80px;
  right: -80px;
}

@media (max-width: 1024px) {
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .testimonial-card:nth-child(2) {
    transform: translateY(0);
  }
  
  .testimonial-card:nth-child(2):hover {
    transform: translateY(-8px);
  }
}

@media (max-width: 768px) {
  .testimonials {
    padding: 60px 24px;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonial-card {
    padding: 24px;
  }
}

@media (max-width: 768px) {
  .nav-user {
    display: none;
  }
  
  .mobile-user-info {
    display: flex;
  }
}