/* ========== 精准传媒 SEO 底部 - 白底专业风 ========== */
.seo-footer {
  margin-top: 60px;
  background: #ffffff;
  border-top: 1px solid var(--seo-border);
  position: relative;
  font-family: 'Inter', 'Microsoft YaHei', sans-serif;
  overflow: hidden;
}

/* 斜切装饰带 */
.seo-footer__deco {
  position: absolute;
  top: -20px;
  left: -5%;
  width: 110%;
  height: 40px;
  background: linear-gradient(135deg, var(--seo-primary), var(--seo-primary-dark));
  transform: rotate(-1.5deg);
  opacity: 0.06;
  pointer-events: none;
}

.seo-footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding: 48px 0 36px;
  position: relative;
  z-index: 1;
}

/* 品牌区 */
.seo-footer__logo {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--seo-primary);
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.seo-footer__desc {
  color: var(--seo-text-soft);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 18px;
  max-width: 300px;
}

.seo-footer__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.seo-footer__tags span {
  padding: 4px 12px;
  background: #f0f4ff;
  border: 1px solid rgba(26, 95, 220, 0.2);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--seo-primary);
  font-weight: 500;
}

/* 列标题 */
.seo-footer__heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--seo-text);
  margin-bottom: 16px;
  position: relative;
  padding-left: 14px;
}

.seo-footer__heading::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 18px;
  background: var(--seo-primary);
  border-radius: 2px;
}

/* 导航列表 */
.seo-footer__nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  columns: 2;
  column-gap: 16px;
}

.seo-footer__nav-list li {
  margin-bottom: 10px;
  break-inside: avoid;
}

.seo-footer__nav-list a {
  color: var(--seo-text-soft);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s, padding 0.2s;
}

.seo-footer__nav-list a:hover {
  color: var(--seo-primary);
  padding-left: 4px;
}

/* 联系信息列表 */
.seo-footer__info-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.seo-footer__info-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--seo-text-soft);
  margin-bottom: 12px;
}

.seo-footer__info-icon {
  width: 32px;
  height: 32px;
  background: #f0f4ff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.seo-footer__info-list a {
  color: var(--seo-text-soft);
  text-decoration: none;
  transition: color 0.2s;
}

.seo-footer__info-list a:hover {
  color: var(--seo-primary);
}

/* 社交图标 */
.seo-footer__social {
  display: flex;
  gap: 10px;
}

.seo-footer__social-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f0f4ff;
  border: 1px solid rgba(26, 95, 220, 0.2);
  border-radius: 10px;
  color: var(--seo-primary);
  transition: all 0.2s;
}

.seo-footer__social-icon:hover {
  background: var(--seo-primary);
  color: #fff;
  border-color: var(--seo-primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(26, 95, 220, 0.25);
}

/* 底部版权栏 */
.seo-footer__bottom {
  background: #f8fafc;
  border-top: 1px solid var(--seo-border);
  padding: 18px 0;
}

.seo-footer__bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.seo-footer__copyright {
  font-size: 0.85rem;
  color: var(--seo-text-soft);
  margin: 0;
}

.seo-footer__desc-mobile {
  display: none; /* 移动端显示简述 */
}

/* 返回顶部按钮 */
.seo-scroll-top {
  position: fixed;
  right: 24px;
  bottom: 40px;
  width: 44px;
  height: 44px;
  background: #fff;
  border: 1px solid var(--seo-border);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  color: var(--seo-primary);
  z-index: 999;
  transition: all 0.2s;
}

.seo-scroll-top:hover {
  background: var(--seo-primary);
  color: #fff;
  border-color: var(--seo-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 95, 220, 0.3);
}

/* 响应式 */
@media (max-width: 768px) {
  .seo-footer__inner {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .seo-footer__bottom-inner {
    flex-direction: column;
    text-align: center;
  }
  .seo-footer__desc-mobile {
    display: block;
    font-size: 0.8rem;
    color: var(--seo-text-light);
    max-width: 400px;
    margin: 0 auto;
  }
  .seo-footer__desc {
    display: none; /* 桌面端描述在移动端隐藏，改用标签 */
  }
}