/* ============================================
   AI Data Agent Platform — 主页面样式
   ============================================ */

/* === 页面容器 === */
.platform {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* === Hero 区域 === */
.platform__hero {
  text-align: center;
  padding: 80px 40px 48px;
  max-width: 680px;
  margin: 0 auto;
  animation: fadeInUp 0.6s var(--ease-standard);
}

.platform__hero-title {
  font-size: 40px;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.platform__hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === Agent 卡片网格 === */
.agent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  padding: 0 80px 80px;
  max-width: 1400px;
  margin: 0 auto;
}

.agent-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  transition: all 0.3s var(--ease-standard);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.5s var(--ease-standard) backwards;
}

.agent-card:nth-child(1) { animation-delay: 0.05s; }
.agent-card:nth-child(2) { animation-delay: 0.1s; }
.agent-card:nth-child(3) { animation-delay: 0.15s; }
.agent-card:nth-child(4) { animation-delay: 0.2s; }

.agent-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.agent-card:hover .agent-card__action {
  opacity: 1;
  transform: translateY(0);
}

.agent-card--offline {
  opacity: 0.6;
  cursor: not-allowed;
}

.agent-card--offline:hover {
  transform: none;
  box-shadow: var(--shadow-card);
}

/* === 卡片内容 === */
.agent-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  background: var(--bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--color-accent);
}

.agent-card__icon svg {
  width: 28px;
  height: 28px;
}

.agent-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.agent-card__name {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.agent-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.agent-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.agent-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.agent-card__status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-tertiary);
}

.agent-card__action {
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.2s var(--ease-standard);
}

.agent-card__action .btn {
  min-height: 36px;
  padding: 8px 16px;
  font-size: 13px;
}

/* === 空状态 === */
.empty-state {
  text-align: center;
  padding: 80px 40px;
  color: var(--text-tertiary);
}

.empty-state__icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.empty-state__title {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.empty-state__desc {
  font-size: 14px;
}

/* === 页脚 === */
.platform__footer {
  text-align: center;
  padding: 40px;
  font-size: 13px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border-subtle);
}

/* === 移动端搜索栏 === */
.mobile-search {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 99;
  animation: fadeIn 0.2s var(--ease-standard);
}

/* === 响应式 === */
@media (max-width: 1199px) {
  .agent-grid {
    padding: 0 40px 60px;
  }
  .platform__hero {
    padding: 60px 40px 40px;
  }
  .platform__hero-title {
    font-size: 32px;
  }
}

@media (max-width: 767px) {
  .agent-grid {
    grid-template-columns: 1fr;
    padding: 0 20px 40px;
    gap: 16px;
  }
  .platform__hero {
    padding: 40px 20px 32px;
  }
  .platform__hero-title {
    font-size: 28px;
  }
  .platform__hero-desc {
    font-size: 15px;
  }
  .agent-card {
    padding: 24px;
  }
  .agent-card__action {
    opacity: 1;
    transform: translateY(0);
  }
}