/* ============================================================
   Footer / Floating Support — 第一批 UI 还原壳层
   ============================================================ */

.footer {
  position: relative;
  margin-top: var(--section-gap);
  padding: var(--space-20) 0 var(--space-8);
  background:
    radial-gradient(circle at top left, rgba(49, 196, 141, 0.14), transparent 24%),
    linear-gradient(180deg, #13201c 0%, #0d1614 100%);
  color: var(--color-text-inverse);
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 24%);
}

.footer-inner {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
  padding-bottom: var(--space-12);
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

/* 品牌头：mark + 标题水平并排，gap 12px 与 nav 保持一致 */
.footer-brand-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient-brand);
  color: #ffffff;
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--shadow-brand);
  flex-shrink: 0;
}

.footer-brand {
  font-size: 22px;
  color: var(--color-text-inverse);
  margin-bottom: 0;
  line-height: 1;
}

.footer-desc {
  max-width: 440px;
  color: rgba(248, 255, 252, 0.72);
  font-size: var(--font-size-small);
}

.footer-proof-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-proof-item {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(248, 255, 252, 0.88);
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-column h4 {
  color: var(--color-text-inverse);
  font-size: var(--font-size-small);
  margin-bottom: var(--space-2);
}

.footer-column a {
  color: rgba(248, 255, 252, 0.72);
  font-size: var(--font-size-small);
}

.footer-column a:hover {
  color: #ffffff;
}

.footer-service-column {
  gap: 10px;
}

.footer-service-card {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-service-card strong {
  display: block;
  color: #ffffff;
  font-size: var(--font-size-small);
  margin-bottom: 4px;
}

.footer-service-card p {
  color: rgba(248, 255, 252, 0.68);
  font-size: var(--font-size-xs);
  line-height: 1.55;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
  color: rgba(248, 255, 252, 0.56);
  font-size: var(--font-size-xs);
}

.footer-bottom-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-bottom-links a {
  color: rgba(248, 255, 252, 0.68);
  font-size: var(--font-size-xs);
  font-weight: 700;
}

.floating-support,
.floating-support-button,
.floating-support-icon,
.floating-support-text {
  display: none !important;
}

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-service-column {
    grid-column: 1 / -1;
  }
}

@media (max-width: 767px) {
  .footer {
    margin-top: 72px;
    padding: var(--space-16) 0 calc(var(--space-12) + 72px);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}