/* 基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #4CAF50;
  --primary-dark: #388E3C;
  --secondary-color: #2196F3;
  --danger-color: #f44336;
  --warning-color: #ff9800;
  --bg-color: #1a1a2e;
  --bg-secondary: #16213e;
  --bg-card: #0f3460;
  --text-color: #eee;
  --text-muted: #aaa;
  --border-color: #333;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  min-height: 100vh;
}

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

/* 导航栏 */
.navbar {
  background: var(--bg-secondary);
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
}

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

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  transition: color 0.3s;
}

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

.nav-auth, .nav-user {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.hidden {
  display: none !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-color);
  transition: 0.3s;
}

/* 按钮 */
.btn {
  padding: 0.5rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1rem;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

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

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

.btn-small {
  padding: 0.25rem 0.75rem;
  font-size: 0.875rem;
}

.btn-large {
  padding: 0.75rem 2rem;
  font-size: 1.1rem;
}

.btn-danger {
  background: var(--danger-color);
  color: white;
}

/* Hero区域 */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--bg-secondary) 100%);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/images/hero-bg.jpg') center/cover;
  opacity: 0.3;
}

.hero-content {
  text-align: center;
  z-index: 1;
  padding: 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.5rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
}

.server-stats {
  display: flex;
  gap: 3rem;
  justify-content: center;
}

.stat {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  color: var(--primary-color);
}

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

/* 特性区域 */
.features {
  padding: 4rem 0;
  background: var(--bg-secondary);
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: var(--primary-color);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  text-align: center;
  transition: transform 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

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

/* 最新帖子 */
.latest-posts {
  padding: 4rem 0;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.view-all {
  color: var(--secondary-color);
  text-decoration: none;
}

.post-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.post-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-card);
  padding: 1.5rem;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-color);
  transition: all 0.3s;
}

.post-item:hover {
  background: var(--bg-secondary);
  transform: translateX(5px);
}

.post-content h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.post-content p {
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.post-category {
  background: var(--primary-color);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
}

/* 服务器信息 */
.server-info {
  padding: 4rem 0;
  background: var(--bg-secondary);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.info-card {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  text-align: center;
}

.info-card h3 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

.ip-address {
  font-size: 1.5rem;
  font-family: monospace;
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

/* 页脚 */
.footer {
  background: var(--bg-card);
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--primary-color);
}

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

.footer-section a {
  color: var(--text-muted);
  text-decoration: none;
  line-height: 2;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* 表单样式 */
.form-container {
  max-width: 500px;
  margin: 3rem auto;
  padding: 2rem;
  background: var(--bg-card);
  border-radius: var(--radius);
}

.form-container h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  color: var(--text-color);
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form-group textarea {
  min-height: 200px;
  resize: vertical;
}

.error-message {
  color: var(--danger-color);
  font-size: 0.875rem;
  margin-top: 0.25rem;
}

/* Toast通知 */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
}

.toast {
  background: var(--bg-card);
  color: var(--text-color);
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  margin-top: 10px;
  box-shadow: var(--shadow);
  animation: slideIn 0.3s ease;
}

.toast.success {
  border-left: 4px solid var(--primary-color);
}

.toast.error {
  border-left: 4px solid var(--danger-color);
}

.toast.info {
  border-left: 4px solid var(--secondary-color);
}

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

/* 通用组件 */
.loading {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
}

.error {
  text-align: center;
  padding: 2rem;
  color: var(--danger-color);
}

.empty-state {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

.pagination {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 2rem;
}

.pagination button {
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: var(--radius);
  cursor: pointer;
}

.pagination button:hover, .pagination button.active {
  background: var(--primary-color);
  border-color: var(--primary-color);
}

.sort-options select {
  padding: 0.5rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  border-radius: var(--radius);
}

/* 帖子详情 */
.post-detail {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 20px;
}

.post-header {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
}

.post-header h1 {
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.post-body {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.post-body pre {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1rem 0;
}

.post-body code {
  background: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: monospace;
}

.post-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

/* 评论 */
.comments-section {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius);
}

.comments-section h3 {
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.comment {
  background: var(--bg-secondary);
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.comment-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.comment-author {
  color: var(--primary-color);
  font-weight: bold;
}

.tag {
  display: inline-block;
  background: var(--secondary-color);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  margin-right: 0.5rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .server-stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .post-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
}