/**
 * 论坛首页推广横幅 — 对标腾讯云开发者社区顶部轮播 + 登录卡
 */

.cdc-promo-hero {
  margin-bottom: 16px;
}

.cdc-promo-board {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 0;
  min-height: 168px;
  border-radius: 4px;
  overflow: hidden;
  background: #fff;
  border: 1px solid #e7eaf0;
}

.cdc-promo-carousel {
  position: relative;
  min-height: 168px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 90% at 85% 20%, rgba(0, 82, 217, 0.08), transparent 60%),
    linear-gradient(135deg, #f7f9fc 0%, #eef3ff 55%, #f5f8ff 100%);
}

.cdc-promo-slide {
  position: absolute;
  inset: 0;
  padding: 28px 32px 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.cdc-promo-slide.is-active {
  opacity: 1;
  visibility: visible;
  position: relative;
  min-height: 168px;
}

.cdc-promo-slide-deco {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 140px;
  height: 100px;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 120 90' fill='none'%3E%3Cpath d='M20 70V30l35-12 35 12v40l-35 12-35-12z' fill='%23dbeafe'/%3E%3Cpath d='M55 18l28 40H27z' fill='%2393c5fd' opacity='.7'/%3E%3Ccircle cx='88' cy='24' r='8' fill='%230052d9' opacity='.25'/%3E%3C/svg%3E")
    center / contain no-repeat;
  pointer-events: none;
  opacity: 0.85;
}

.cdc-promo-badge {
  display: inline-flex;
  align-items: center;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 600;
  color: #1f2329;
}

.cdc-promo-title {
  margin: 0;
  max-width: 28em;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: #1f2329;
}

.cdc-promo-desc {
  margin: 10px 0 0;
  max-width: 36em;
  font-size: 14px;
  line-height: 1.65;
  color: #86909c;
}

.cdc-promo-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 18px;
  height: 36px;
  padding: 0 20px;
  border-radius: 2px;
  background: #0052d9;
  color: #fff !important;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none !important;
  border: 0;
  cursor: pointer;
}

.cdc-promo-cta:hover {
  background: #0047c2;
  color: #fff !important;
}

.cdc-promo-dots {
  position: absolute;
  left: 32px;
  bottom: 14px;
  display: flex;
  gap: 6px;
  z-index: 2;
}

.cdc-promo-dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(0, 82, 217, 0.2);
  cursor: pointer;
}

.cdc-promo-dots button.is-on {
  background: #0052d9;
}

.cdc-promo-arrows {
  position: absolute;
  right: 16px;
  bottom: 10px;
  display: flex;
  gap: 4px;
  z-index: 2;
}

.cdc-promo-arrows button {
  width: 28px;
  height: 28px;
  border: 1px solid #d0d5dd;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.9);
  color: #4e5969;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
}

.cdc-promo-arrows button:hover {
  color: #0052d9;
  border-color: #0052d9;
}

.cdc-promo-login {
  border-left: 1px solid #e7eaf0;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 18px;
}

.cdc-promo-login-inner {
  width: 100%;
  text-align: center;
}

.cdc-promo-login-icon {
  display: block;
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0052d9, #4d8fff);
  position: relative;
}

.cdc-promo-login-icon::after {
  content: '';
  position: absolute;
  inset: 14px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-top-color: transparent;
  border-left-color: transparent;
  transform: rotate(25deg);
}

.cdc-promo-login-copy h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: #1f2329;
}

.cdc-promo-login-copy p {
  margin: 0 0 14px;
  font-size: 13px;
  color: #86909c;
  line-height: 1.5;
}

.cdc-promo-login-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 36px;
  border: 0;
  border-radius: 2px;
  background: #0052d9;
  color: #fff !important;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none !important;
  cursor: pointer;
}

.cdc-promo-login-btn:hover {
  background: #0047c2;
}

@media (max-width: 960px) {
  .cdc-promo-board {
    grid-template-columns: 1fr;
  }

  .cdc-promo-login {
    border-left: 0;
    border-top: 1px solid #e7eaf0;
    padding: 16px;
  }

  .cdc-promo-slide-deco {
    display: none;
  }

  .cdc-promo-title {
    font-size: 18px;
  }
}

@media (max-width: 768px) {
  .cdc-promo-slide {
    padding: 20px 18px 36px;
  }

  .cdc-promo-dots {
    left: 18px;
  }
}