/**
 * Footer CSS - 底部样式
 */

/* ========== Footer 主体 ========== */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-white);
  padding-top: var(--spacing-16);
}

/* ========== Footer 顶部区域 ========== */
.footer-top {
  padding-bottom: var(--spacing-10);
  border-bottom: 1px solid var(--color-gray-700);
}

.footer-brand {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.footer-logo {
  width: 138px;
  height: 32px;
  background: url('../images/logo.png');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  display: flex;
  align-items: center;
}

.footer-logo-icon {
  width: 32px;
  height: 32px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: var(--font-bold);
  font-size: var(--text-lg);
}

.footer-description {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-gray-400);
  margin-bottom: 0;
}

/* 社交媒体链接 */
.footer-social {
  display: flex;
  align-items: center;
  gap: var(--spacing-4);
}

.footer-social-label {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.footer-social-links {
  display: flex;
  gap: var(--spacing-3);
}

.footer-social-link {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-gray-800);
  border-radius: var(--radius-md);
  color: var(--color-white);
  transition: background-color var(--transition-fast);
}

.footer-social-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.footer-social-link svg {
  width: 18px;
  height: 18px;
}

/* ========== Footer 链接区域 ========== */
.footer-links {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-8);
  padding: var(--spacing-10) 0;
}

.footer-column {
  min-width: 0;
}

.footer-column-title {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-4);
  font-family: var(--font-body);
}

.footer-column-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-link {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer-link:hover {
  color: var(--color-primary);
}

/* 带下划线的链接 */
.footer-link-underline {
  text-decoration: underline;
}

/* ========== Footer 底部区域 ========== */
.footer-bottom {
  padding: var(--spacing-6) 0;
  border-top: 1px solid var(--color-gray-700);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-contact-item {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
}

.footer-contact-item a {
  color: var(--color-primary);
}

.footer-contact-item a:hover {
  text-decoration: underline;
}

/* ========== Footer 二维码/地图区域 ========== */
.footer-qrcode {
  width: 100px;
  height: 100px;
  background-color: var(--color-gray-700);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-gray-500);
  font-size: var(--text-xs);
}

/* QR Code 下方的联系信息 */
.footer-contact-info {
  margin-top: var(--spacing-6);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-gray-700);
}

.footer-contact-info p {
  font-size: var(--text-sm);
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-2);
  line-height: var(--leading-relaxed);
  white-space: nowrap;
}

.footer-contact-info p:last-child {
  margin-bottom: 0;
}

.footer-contact-info a {
  color: var(--color-primary);
  transition: color var(--transition-fast);
}

.footer-contact-info a:hover {
  text-decoration: underline;
}

/* ========== 响应式 ========== */
@media (max-width: 1199px) {
  .footer-links {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (max-width: 991px) {
  .footer-top {
    flex-direction: column;
    gap: var(--spacing-6);
  }
  
  .footer-brand {
    max-width: 100%;
  }
  
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 767px) {
  .footer {
    padding-top: var(--spacing-12);
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-6);
  }
  
  .footer-social {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-3);
  }
  
  .footer-contact {
    gap: var(--spacing-3);
  }
}

@media (max-width: 479px) {
  .footer-links {
    grid-template-columns: 1fr;
  }
  
  .footer-column {
    padding-bottom: var(--spacing-4);
    border-bottom: 1px solid var(--color-gray-800);
  }
  
  .footer-column:last-child {
    border-bottom: none;
  }
}