/* ========== 联系我们页 — 导航扩展下拉（Nav Dropdown Helpers） ========== */
.pull-down.grid-3 {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 0 8px;
  min-width: 480px;
}
.drop-down:hover > .pull-down.grid-3,
.drop-down.open > .pull-down.grid-3 {
  display: grid;
}
.pull-down .nav-group-title {
  display: block;
  padding: 8px 14px 4px;
  font-size: 13px;
  font-weight: 700;
  color: #888;
  pointer-events: none;
}

/* ========== 英雄区背景（Hero Background） ========== */
.contact-hero {
  position: relative;
  background: url('https://data.tibetcn.com/image/Contact-Us-bg.jpg') center center / cover no-repeat;
  padding: 50px 20px 60px;
  min-height: 520px;
}
.contact-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.48);
  pointer-events: none;
}

/* ========== 双栏布局（Two-Column Wrap） ========== */
.contact-hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: stretch;
  gap: 24px;
  max-width: 1140px;
  margin: 0 auto;
}
.contact-info-card {
  flex: 0 0 38%;
  max-width: 38%;
}
.contact-form-card {
  flex: 1 1 62%;
  max-width: 62%;
}

/* ========== 联系信息卡片（Info Card） ========== */
.contact-info-card {
  background: #fffef9;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  padding: 32px 28px;
  color: #333;
}
.info-card-title {
  font-size: 22px;
  font-weight: 700;
  color: #333;
  margin: 0 0 22px;
  padding-bottom: 12px;
  border-bottom: 2px solid #f78600;
}
.info-list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}
.info-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 12px;
  font-size: 14px;
  line-height: 1.6;
}
.info-label {
  font-weight: 600;
  color: #555;
  flex-shrink: 0;
}
.info-value {
  color: #222;
  word-break: break-all;
}
.info-qr-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px solid #eee;
}
.info-qr-item {
  flex: 1;
  text-align: center;
}
.info-qr-item img {
  display: block;
  width: 80px;
  height: 80px;
  margin: 0 auto 8px;
  border-radius: 6px;
  object-fit: cover;
  border: 1px solid #e8e8e8;
}
.info-qr-item p {
  margin: 0;
  font-size: 12px;
  color: #666;
  line-height: 1.4;
}

/* ========== 表单卡片（Form Card） ========== */
.contact-form-card {
  background: #fdf6f0;
  border-radius: 12px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
  padding: 32px 36px 36px;
}
.form-card-title {
  font-size: 22px;
  font-weight: 700;
  color: #333;
  margin: 0 0 14px;
}
.form-intro {
  font-size: 14px;
  line-height: 1.75;
  color: #555;
  margin: 0 0 24px;
}
.form-section-title {
  font-size: 18px;
  font-weight: 700;
  color: #333;
  margin: 0 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid #f78600;
}
.form-section-title:not(:first-of-type) {
  margin-top: 8px;
}

/* ========== 表单字段（Form Fields） ========== */
.contact-form-card label.field-label {
  display: block;
  font-size: 14px;
  color: #333;
  margin-bottom: 6px;
}
.contact-form-card label.field-label .req {
  color: #f78600;
  margin-left: 2px;
}
.form-row {
  margin-bottom: 18px;
}
.form-row-2col {
  display: flex;
  gap: 20px;
}
.form-row-2col .form-col {
  flex: 1;
  min-width: 0;
}
.contact-form-card input[type="text"],
.contact-form-card input[type="email"],
.contact-form-card select,
.contact-form-card textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 14px;
  color: #333;
  background: #fff;
  transition: border-color 0.2s;
  box-sizing: border-box;
}
.contact-form-card input:focus,
.contact-form-card select:focus,
.contact-form-card textarea:focus {
  outline: none;
  border-color: #f78600;
}
.contact-form-card textarea {
  min-height: 120px;
  resize: vertical;
}
.formerror {
  display: none;
  color: #f78600;
  font-size: 13px;
  margin-top: 6px;
}
.formerror.visible {
  display: block;
}

/* ========== 提交按钮（Submit Button） ========== */
.submit-wrap {
  text-align: center;
  margin-top: 28px;
}
#submitBtn {
  display: inline-block;
  min-width: 200px;
  padding: 14px 40px;
  background: #f78600;
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}
#submitBtn:hover {
  background: linear-gradient(135deg, #f78600 0%, #e06a00 100%);
  transform: translateY(-1px);
}
#submitBtn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}
#submitLoading {
  display: none;
  margin-left: 12px;
  font-size: 14px;
  color: #888;
}
#submitLoading.visible {
  display: inline;
}

/* ========== 响应式（Responsive — stack under 900px） ========== */
@media (max-width: 999px) {
  .pull-down.grid-3 {
    min-width: 280px;
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .contact-hero {
    padding: 36px 16px 48px;
  }
  .contact-hero-inner {
    flex-direction: column;
  }
  .contact-info-card,
  .contact-form-card {
    flex: none;
    max-width: 100%;
    width: 100%;
  }
  .contact-info-card {
    padding: 24px 20px;
  }
  .contact-form-card {
    padding: 24px 20px 28px;
  }
  .form-row-2col {
    flex-direction: column;
    gap: 0;
  }
  .info-qr-item img {
    width: 72px;
    height: 72px;
  }
}

@media (max-width: 599px) {
  .contact-hero {
    padding: 28px 12px 40px;
  }
  .info-card-title,
  .form-card-title {
    font-size: 20px;
  }
  .form-section-title {
    font-size: 16px;
  }
  .info-qr-row {
    flex-wrap: wrap;
    justify-content: center;
  }
  .info-qr-item {
    flex: 0 0 auto;
    min-width: 90px;
  }
}