/* ── 尾部 ── */
.footer {
  width: 100vw;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #F5EDE6;
  color: rgba(42, 26, 20, 0.78);
  gap: var(--space-lg);
  padding: var(--space-lg);
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.footer__title {
  font-family: var(--font-brand);
  font-size: clamp(48px, 8vw, 96px);
  font-weight: 300;
  letter-spacing: 0.18em;
  color: #2A1A14;
}

.footer__tagline {
  font-family: var(--font-zh);
  font-size: 16px;
  font-weight: 300;
  letter-spacing: 0.12em;
  color: rgba(42, 26, 20, 0.6);
  margin-top: var(--space-xs);
}

.footer__buttons {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.footer__btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  transition: background 0.22s, color 0.22s, border-color 0.22s,
              box-shadow 0.22s, transform 0.22s;
}

.footer__btn:hover {
  transform: translateY(-2px);
}

.footer__btn--appstore {
  background: rgba(200, 80, 106, 0.82);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 4px 20px rgba(200, 80, 106, 0.28);
}

.footer__btn--android {
  background: rgba(255, 255, 255, 0.42);
  color: var(--color-accent);
  border-color: rgba(255, 255, 255, 0.65);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.footer__btn--android:hover {
  background: rgba(200, 80, 106, 0.82);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 4px 20px rgba(200, 80, 106, 0.28);
}

.footer__buttons:has(.footer__btn--android:hover) .footer__btn--appstore {
  background: rgba(255, 255, 255, 0.42);
  color: var(--color-accent);
  border-color: rgba(255, 255, 255, 0.65);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.footer__legal {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-zh);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(42, 26, 20, 0.35);
}

.footer__legal-btn {
  background: none;
  border: none;
  padding: 0;
  font-family: var(--font-zh);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(42, 26, 20, 0.35);
  cursor: pointer;
  transition: color 0.2s;
}

.footer__legal-btn:hover {
  color: rgba(42, 26, 20, 0.65);
}

/* ── 弹窗 ── */
.legal-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.28s ease;
}

.legal-modal.open {
  pointer-events: all;
  opacity: 1;
}

.legal-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(42, 26, 20, 0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.legal-modal__panel {
  position: relative;
  z-index: 1;
  width: min(720px, 90vw);
  max-height: 82vh;
  background: #FFFAF7;
  border-radius: 20px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 64px rgba(42, 26, 20, 0.18);
  transform: translateY(24px);
  transition: transform 0.28s ease;
}

.legal-modal.open .legal-modal__panel {
  transform: translateY(0);
}

.legal-modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 36px 20px;
  border-bottom: 1px solid rgba(42, 26, 20, 0.08);
  flex-shrink: 0;
}

.legal-modal__title {
  font-family: var(--font-zh);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: #2A1A14;
}

.legal-modal__close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: rgba(42, 26, 20, 0.4);
  transition: color 0.2s;
  display: flex;
  align-items: center;
}

.legal-modal__close:hover {
  color: rgba(42, 26, 20, 0.8);
}

.legal-modal__body {
  overflow-y: auto;
  padding: 28px 36px 36px;
  font-family: var(--font-zh);
  font-size: 14px;
  line-height: 1.9;
  color: rgba(42, 26, 20, 0.7);
}

.legal-modal__body h3 {
  font-size: 14px;
  font-weight: 500;
  color: #2A1A14;
  margin: 24px 0 8px;
  letter-spacing: 0.04em;
}

.legal-modal__body h3:first-child {
  margin-top: 0;
}

.legal-modal__body p {
  margin: 0 0 10px;
}

.legal-modal__body ul {
  margin: 0 0 10px;
  padding-left: 20px;
}

.legal-modal__body ul li {
  margin-bottom: 4px;
}

.legal-modal__body .legal-modal__updated {
  font-size: 12px;
  color: rgba(42, 26, 20, 0.35);
  margin-bottom: 24px;
}

/* ── 回到顶部 ── */
.back-top {
  position: fixed;
  right: 32px;
  bottom: 36px;
  z-index: 200;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(200, 80, 106, 0.28);
  background: rgba(245, 237, 230, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(200, 80, 106, 0.14);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease,
              background 0.22s, box-shadow 0.22s;
  pointer-events: none;
}

.back-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-top:hover {
  background: rgba(200, 80, 106, 0.82);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 6px 24px rgba(200, 80, 106, 0.32);
  transform: translateY(-2px);
}