/* ============================================================
   功能介绍区 - 增强样式
   ============================================================ */

/* ---- 标题区居中 ---- */
.section-header-center {
  text-align: center;
  margin-bottom: 40px;
}

.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: linear-gradient(135deg, #dbeafe, #eff6ff);
  color: #2563eb;
  font-size: 13px;
  font-weight: 600;
  border-radius: 20px;
  margin-bottom: 14px;
  border: 1px solid rgba(37, 99, 235, 0.12);
}

/* ---- 功能卡片顶部彩条 ---- */
.feature-card-topbar {
  height: 4px;
  width: 100%;
  background: linear-gradient(90deg, #3b82f6, #60a5fa);
  border-radius: 2px 2px 0 0;
  margin: -24px -24px 20px -24px;
  width: calc(100% + 48px);
}

/* ---- 功能卡片头部（图标 + 标签横排） ---- */
.feature-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: linear-gradient(135deg, #ef4444, #f87171);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  border-radius: 10px;
  letter-spacing: 0.5px;
}

.feature-badge.vip {
  background: linear-gradient(135deg, #f59e0b, #fbbf24);
  color: #78350f;
}

/* ---- 功能描述 ---- */
.feature-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #475569;
  margin: 0 0 16px 0;
}

/* ---- 功能标签云 ---- */
.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.ftag {
  display: inline-block;
  padding: 5px 12px;
  background: #f1f5f9;
  color: #475569;
  font-size: 12px;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  transition: all 0.2s ease;
}

.ftag:hover {
  background: #e2e8f0;
  transform: translateY(-1px);
}

.ftag-vip {
  background: linear-gradient(135deg, #fef3c7, #fffbeb);
  color: #92400e;
  border-color: #fde68a;
}

.ftag-vip:hover {
  background: linear-gradient(135deg, #fde68a, #fef3c7);
}

/* ---- 热门卡片特效 ---- */
.feature-card-hot {
  border: 2px solid rgba(239, 68, 68, 0.15) !important;
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.08) !important;
}

.feature-card-hot:hover {
  border-color: rgba(239, 68, 68, 0.3) !important;
  box-shadow: 0 8px 30px rgba(239, 68, 68, 0.12) !important;
}

/* ---- VIP卡片特效 ---- */
.feature-card-vip {
  border: 2px solid rgba(245, 158, 11, 0.2) !important;
  background: linear-gradient(180deg, #ffffff 0%, #fffbeb 100%) !important;
  box-shadow: 0 4px 20px rgba(245, 158, 11, 0.08) !important;
}

.feature-card-vip:hover {
  border-color: rgba(245, 158, 11, 0.35) !important;
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.15) !important;
}

/* ---- 功能按钮 ---- */
.feature-btn {
  width: 100%;
  text-align: center;
  justify-content: center;
  margin-top: auto;
}

/* ---- 卡片图标放大 ---- */
.feature-icon-large {
  font-size: 36px !important;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.08));
}

/* ---- 功能卡片标题微调 ---- */
.feature-card h3 {
  font-size: 16px !important;
  font-weight: 600 !important;
  margin: 0 0 8px 0 !important;
  color: var(--text-primary) !important;
}

/* ---- 原有 feature-card 增强 ---- */
.feature-card {
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
}

/* ---- 响应式适配 ---- */
@media (max-width: 768px) {
  .section-header-center {
    margin-bottom: 24px;
  }
  .section-badge {
    font-size: 12px;
    padding: 4px 12px;
  }
  .feature-card-topbar {
    margin: -20px -20px 16px -20px;
    width: calc(100% + 40px);
  }
  .feature-card {
    padding: 20px;
  }
  .feature-desc {
    font-size: 13px;
    line-height: 1.6;
  }
  .feature-icon-large {
    font-size: 30px !important;
  }
  .feature-card h3 {
    font-size: 15px !important;
  }
  .ftag {
    font-size: 11px;
    padding: 4px 10px;
  }
}

@media (max-width: 480px) {
  .section-header-center {
    margin-bottom: 18px;
  }
  .feature-card {
    padding: 16px;
  }
  .feature-card-topbar {
    margin: -16px -16px 12px -16px;
    width: calc(100% + 32px);
    height: 3px;
  }
  .feature-desc {
    font-size: 13px;
    margin-bottom: 12px;
  }
  .feature-tags {
    gap: 6px;
    margin-bottom: 14px;
  }
  .feature-btn {
    font-size: 14px;
    padding: 10px 0;
  }
  /* 移动端禁用 hover 悬浮上移效果 */
  .feature-card:hover {
    transform: none;
  }
  .ftag:hover {
    transform: none;
  }
}