/* 页脚模块 */
.site-footer {
  --site-footer-inline-space: max(20px, calc((100vw - var(--navbar-layout-content-width, 80vw)) / 2));
  width: 100%;
  padding: 40px var(--site-footer-inline-space) 10px;
  background:
    linear-gradient(135deg, rgba(8, 27, 49, 0.98), rgba(7, 43, 79, 0.94)),
    #0c1626;
}

.ui-shell.site-footer__shell {
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  margin: 0;
  padding-left: 0;
  padding-right: 0;
}

/* 三栏页脚主布局 */
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.28fr) minmax(0, 0.72fr) minmax(0, 0.8fr);
  align-items: center;
}

.site-footer__brand,
.site-footer__column {
  display: flex;
  flex-direction: column;
  gap: 14px;
  color: rgba(255, 255, 255, 0.82);
  text-align: left;
}

.site-footer__column--contact {
  position: relative;
  padding-right: 88px;
}

.site-footer__heading,
.site-footer__label,
.site-footer__value,
.site-footer__nav-link,
.site-footer__social-link,
.site-footer__copyright {
  color: inherit;
}

.site-footer > .ui-shell {
  box-sizing: border-box;
  width: 100%;
  max-width: none;
  margin: 0;
  padding-left: 0;
  padding-right: 0;
}

.site-footer__heading {
  margin: 0;
  margin-bottom: 6px;
  color: var(--ui-color-white);
  font-size: var(--font-title-md);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

/* 联系方式与导航项 */
.site-footer__info {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-height: 24px;
}

.site-footer__label {
  flex: none;
  color: rgba(255, 255, 255, 0.54);
  font-size: var(--font-body-md);
  line-height: 1.5;
  cursor: default;
}

.site-footer__value,
.site-footer__nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0;
  border: 0;
  background: transparent;
  color: rgba(255, 255, 255, 0.78);
  font-size: var(--font-body-md);
  font-family: inherit;
  line-height: 1.5;
  text-align: left;
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease;
}

.site-footer__value:hover,
.site-footer__value:focus-visible,
.site-footer__nav-link:hover,
.site-footer__social-link:hover {
  color: var(--ui-color-white);
  transform: translateY(-1px);
}

.site-footer__value:focus-visible {
  outline: 1px solid var(--ui-outline-inverse);
  outline-offset: 4px;
}

.site-footer__copy-trigger {
  position: relative;
  cursor: pointer;
  overflow: visible;
}

.site-footer__copy-trigger[data-copy-state='copied'] {
  color: #ffffff;
}

/* 复制后的浮层提示 */
.site-copy-toast {
  position: absolute;
  top: 50%;
  left: calc(100% + 10px);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 58px;
  padding: 5px 10px;
  border: 1px solid var(--ui-border-inverse-soft);
  border-radius: var(--ui-radius-pill);
  background: rgba(11, 16, 26, 0.92);
  box-shadow: var(--ui-shadow-floating);
  color: rgba(255, 255, 255, 0.92);
  font-size: var(--font-body-sm);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  letter-spacing: 0.04em;
  opacity: 0;
  pointer-events: none;
  transform: translate3d(-4px, -50%, 0);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.site-copy-toast[data-visible='true'] {
  opacity: 1;
  transform: translate3d(0, -50%, 0);
}

/* 品牌信息区 */
.site-footer__brand {
  align-items: flex-start;
  justify-content: center;
  gap: 22px;
}

.site-footer__brand-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-footer__brand-logo img {
  display: block;
  width: auto;
  height: 48px;
}

/* 社媒 */
.site-footer__social {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: rgba(255, 255, 255, 0.84);
  text-decoration: none;
  transition: color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
}

.site-footer__social-link:hover {
  opacity: 0.92;
}

.site-footer__social-link img {
  display: block;
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex: none;
}

/* 底部版权信息 */
.site-footer__copyright {
  margin: 28px 0 0;
  padding-top: 16px;
  color: rgba(255, 255, 255, 0.56);
  font-size: var(--font-body-sm);
  line-height: 1.5;
  text-align: center;
  letter-spacing: 0.04em;
}

@media (max-width: 1199.98px) {
  /* 移动端页脚压缩为联系信息和社媒两行 */
  .site-footer {
    padding: 52px 24px 10px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 18px;
    align-items: flex-start;
  }

  .site-footer__column--contact {
    gap: 10px;
    padding-right: 0;
  }

  /* 复制提示改到标题上方居中显示 */
  .site-footer__column--contact .site-copy-toast {
    top: 0;
    left: 50%;
    min-width: 72px;
    transform: translate3d(-50%, calc(-100% - 10px), 0);
  }

  .site-footer__column--contact .site-copy-toast[data-visible='true'] {
    transform: translate3d(-50%, calc(-100% - 6px), 0);
  }

  .site-footer__info {
    flex-wrap: wrap;
  }

  .site-footer__inner > .site-footer__column:not(.site-footer__column--contact),
  .site-footer__brand-logo {
    display: none;
  }

  .site-footer__brand {
    gap: 0;
  }

  /* 保留备案信息并单独占据底部一行 */
  .site-footer__copyright {
    margin-top: 18px;
    padding-top: 14px;
  }

  /* 社媒图标保持同一行展示 */
  .site-footer__social {
    flex-wrap: nowrap;
    gap: 10px;
  }

  .site-footer__social-link,
  .site-footer__social-link img {
    width: 40px;
    height: 40px;
  }
}