/* ==========================================================================
   公共模块样式 | common.css
   依赖: variable.css / base.css
   说明: 页脚等跨页面复用组件样式
   ========================================================================== */

/* ---------- 站点页脚 ---------- */
.site-footer {
  margin-top: 0;
  color: rgba(255, 255, 255, 0.88);
}

.site-footer__main {
  position: relative;
  padding: 56px 0 48px;
  background:
    radial-gradient(ellipse 80% 60% at 12% 20%, rgba(74, 149, 209, 0.28), transparent 55%),
    linear-gradient(145deg, #0f4a7d 0%, #145d99 42%, #1c74bb 100%);
  overflow: hidden;
}

.site-footer__main::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.45;
  pointer-events: none;
}

.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.35fr repeat(4, minmax(0, 1fr)) 1.35fr;
  gap: 28px 22px;
  align-items: start;
}

.site-footer__brand {
  padding-right: 12px;
}

.site-footer__logo {
  display: inline-block;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.site-footer__logo:hover {
  color: #fff;
  opacity: 0.92;
}

.site-footer__slogan {
  margin: 16px 0 0;
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer__hotline {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 18px;
  color: #fff;
}

.site-footer__hotline:hover {
  color: #fff;
  opacity: 0.92;
}

.site-footer__hotline span {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__hotline strong {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.site-footer__title {
  margin: 0 0 16px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.06em;
  position: relative;
  padding-bottom: 10px;
}

.site-footer__title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.85);
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.875rem;
  line-height: 1.5;
  transition: color 0.25s ease, transform 0.25s ease;
}

.site-footer__links a:hover {
  color: #fff;
  transform: translateX(2px);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-footer__contact li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.875rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer__contact a {
  color: rgba(255, 255, 255, 0.9);
}

.site-footer__contact a:hover {
  color: #fff;
}

.site-footer__label {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.55);
}

.site-footer__qr {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-top: 18px;
}

.site-footer__qr img {
  width: 108px;
  height: 108px;
  padding: 6px;
  background: #fff;
  border-radius: var(--radius-sm);
  object-fit: contain;
}

.site-footer__qr span {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__copy {
  padding: 14px 0;
  background: #f5f7fa;
  border-top: 1px solid rgba(28, 116, 187, 0.08);
}

.site-footer__copy .container {
  text-align: center;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.site-footer__copy p {
  margin: 0;
  text-align: center;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ---------- 404 ---------- */
.err404 {
  max-width: 560px;
  margin: 0 auto;
  padding: 64px 0 72px;
  text-align: center;
}

.err404__code {
  margin: 0;
  font-size: clamp(4rem, 14vw, 7rem);
  font-weight: 800;
  line-height: 1;
  color: var(--color-primary);
}

.err404__title {
  margin: 16px 0 8px;
  font-size: 1.25rem;
  color: var(--color-text-primary);
}

.err404__desc {
  margin: 0 0 24px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.err404__search {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.err404__search input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.err404__search button {
  flex-shrink: 0;
  height: 44px;
  padding: 0 26px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

.err404__search button:hover {
  background: var(--color-primary-dark);
}

.err404__links a {
  margin: 0 10px;
  color: var(--color-primary);
  font-size: 0.875rem;
}

/* ---------- 页脚响应式 ---------- */
@media (max-width: 992px) {
  .site-footer__main {
    padding: 48px 0 40px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr 1fr;
    gap: 28px 20px;
  }

  .site-footer__brand {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 16px 24px;
    align-items: center;
    padding-right: 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }

  .site-footer__slogan {
    margin: 0;
  }

  .site-footer__hotline {
    margin-top: 0;
    text-align: right;
  }
}

@media (max-width: 768px) {
  .site-footer__main {
    padding: 36px 0 28px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__brand {
    grid-column: auto;
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
    padding-bottom: 20px;
  }

  .site-footer__brand + nav.site-footer__col,
  .site-footer__col:not(.site-footer__col--contact) {
    display: none;
  }

  .site-footer__hotline {
    text-align: center;
    margin-top: 4px;
  }

  .site-footer__hotline strong {
    font-size: 1.35rem;
  }

  .site-footer__title {
    font-size: 0.9rem;
    margin-bottom: 10px;
  }

  .site-footer__title::after {
    left: 0;
  }

  .site-footer__links a {
    padding: 5px 0;
    font-size: 0.82rem;
  }

  .site-footer__col--contact {
    grid-column: 1 / -1;
    padding: 16px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
  }

  .site-footer__contact li {
    font-size: 0.82rem;
  }

  .site-footer__qr {
    margin-top: 12px;
  }

  .site-footer__copy .container {
    font-size: 0.72rem;
    padding-inline: 12px;
  }
}

@media (max-width: 480px) {
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .site-footer__logo img {
    height: 40px;
  }

  .site-footer__hotline strong {
    font-size: 1.2rem;
  }

  .site-footer__copy p {
    font-size: 0.75rem;
    padding-inline: 4px;
  }
}