/* ==================== 变量定义 ==================== */
:root {
  --bg-primary: #F5F5F5;
  --bg-secondary: #FFFFFF;
  --bg-tertiary: #FAFAFA;
  --bg-hover: #F0F0F0;
  --text-primary: #1A1A1A;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border-color: #E5E5E5;
  --accent-color: #07C160;
  --accent-gradient: linear-gradient(135deg, #07C160, #06AD56);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --transition: all 0.2s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ==================== 头部 ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-icon {
  height: 32px;
  width: auto;
  flex-shrink: 0;
}

.logo-icon svg {
  width: auto;
  height: 100%;
  display: block;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-primary-sm {
  padding: 8px 16px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary-sm:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(7, 193, 96, 0.4);
}

/* ==================== 登录相关 ==================== */
.btn-login {
  color: var(--text-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.btn-login:hover {
  background: var(--bg-hover);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 12px;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
}

.user-info:hover {
  background: var(--bg-hover);
}

.user-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  color: white;
}

/* ==================== 主内容 ==================== */
.main-content {
  padding-top: 64px;
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 80px;
}

/* ==================== Hero ==================== */
.hero {
  text-align: center;
  padding: 80px 0 48px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-search {
  max-width: 600px;
  margin: 0 auto 32px;
  position: relative;
}

.hero-search input {
  width: 100%;
  padding: 16px 20px 16px 52px;
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  font-size: 16px;
  outline: none;
  transition: var(--transition);
}

.hero-search input:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 4px rgba(7, 193, 96, 0.1);
}

.hero-search .search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-color);
}

/* ==================== Tab 切换 ==================== */
.tab-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  padding: 6px;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: 12px 24px;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

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

.tab-btn.active {
  background: var(--accent-gradient);
  color: white;
}

.tab-count {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 12px;
}

.tab-btn:not(.active) .tab-count {
  background: var(--bg-tertiary);
}

/* ==================== 分类筛选 ==================== */
.category-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.category-btn {
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.category-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.category-btn.active {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

/* ==================== 项目卡片 ==================== */
.items-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
}

.item-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.item-card:hover {
  border-color: var(--accent-color);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  font-size: 40px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-badge {
  background: var(--accent-color);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 500;
}

.card-author {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.card-tag {
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.card-stats {
  display: flex;
  gap: 16px;
}

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

.card-price {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-color);
}

/* ==================== 空状态 ==================== */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-text {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ==================== 详情弹窗 ==================== */
.detail-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
}

.detail-modal {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  padding: 32px;
}

.detail-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  background: var(--bg-tertiary);
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.detail-close:hover {
  background: var(--bg-hover);
}

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

.detail-icon {
  font-size: 64px;
  width: 100px;
  height: 100px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-info {
  flex: 1;
}

.detail-name {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.detail-badge {
  background: var(--accent-color);
  color: white;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
}

.detail-author {
  color: var(--text-secondary);
  font-size: 14px;
}

.detail-stats {
  display: flex;
  gap: 24px;
  padding: 20px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
}

.detail-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.detail-stat-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.detail-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.detail-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.detail-tag {
  background: var(--bg-tertiary);
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 13px;
  color: var(--text-secondary);
}

.detail-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.btn-download {
  flex: 1;
  padding: 14px 24px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(7, 193, 96, 0.4);
}

.btn-secondary {
  padding: 14px 24px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

.detail-section {
  margin-bottom: 24px;
}

.detail-section h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text-primary);
}

.detail-section p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.detail-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.detail-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 14px;
}

.feature-check {
  color: var(--accent-color);
  font-weight: 600;
}

.detail-cmd {
  background: #1a1a1a;
  border-radius: var(--radius-md);
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.detail-cmd:hover {
  background: #2a2a2a;
}

.cmd-text {
  color: #00ff00;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 14px;
}

.cmd-copy {
  color: #888;
  font-size: 18px;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero-desc {
    font-size: 16px;
  }

  .hero-stats {
    gap: 24px;
  }

  .stat-num {
    font-size: 24px;
  }

  .items-grid {
    grid-template-columns: 1fr;
  }

  .tab-btn {
    padding: 10px 16px;
    font-size: 14px;
  }

  .detail-modal {
    padding: 24px;
  }

  .detail-header {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .detail-features {
    grid-template-columns: 1fr;
  }
}