/* ============================================================
   大熊物联科技 — support.css  技术支持专属样式
   ============================================================ */

/* =================================================================
   资料下载区
   ================================================================= */
.support-page { padding: 64px 0 88px; }
.support-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 36px;
  align-items: start;
}

/* --- 下载列表 --- */
.download-section { margin-bottom: 48px; }
.download-section h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--text-dark);
  margin-bottom: 16px; padding-left: 14px;
  border-left: 4px solid var(--primary);
}
.download-list { display: flex; flex-direction: column; gap: 12px; }
.download-item {
  display: flex; align-items: center; gap: 16px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 20px; transition: all 0.25s;
}
.download-item:hover { box-shadow: var(--shadow); border-color: var(--primary-light); transform: translateX(4px); }
.dl-icon {
  width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
}
.dl-icon.pdf  { background: #fff0f0; color: #e53935; }
.dl-icon.zip  { background: #fff8e1; color: #f9a825; }
.dl-icon.doc  { background: #e3f2fd; color: var(--primary); }
.dl-info { flex: 1; min-width: 0; }
.dl-info h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.dl-info span { font-size: 0.82rem; color: var(--text-gray); }
.dl-size { font-size: 0.82rem; color: var(--text-gray); flex-shrink: 0; }
.dl-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: #fff; padding: 7px 16px; border-radius: 6px;
  font-size: 0.84rem; font-weight: 600; flex-shrink: 0; transition: var(--transition);
}
.dl-btn:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* =================================================================
   FAQ
   ================================================================= */
.faq-section { margin-bottom: 56px; }
.accordion-item {
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; margin-bottom: 10px; background: #fff;
}
.accordion-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; cursor: pointer; font-weight: 600; font-size: 0.96rem;
  transition: background 0.2s; user-select: none;
}
.accordion-header:hover { background: var(--bg-light); }
.accordion-header.active { background: var(--primary-light); color: var(--primary); }
.accordion-header .acc-icon { transition: transform 0.3s; flex-shrink: 0; color: var(--primary); }
.accordion-header.active .acc-icon { transform: rotate(45deg); }
.accordion-body {
  max-height: 0; overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 22px; font-size: 0.9rem; color: var(--text-gray); line-height: 1.85;
}
.accordion-body.open { max-height: 400px; padding: 16px 22px 20px; }

/* =================================================================
   技术交流 & 联系表单
   ================================================================= */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 56px; }
.contact-card {
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  padding: 28px 24px; text-align: center; transition: all 0.3s;
}
.contact-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.contact-card-icon {
  width: 60px; height: 60px; border-radius: 50%; margin: 0 auto 16px;
  display: flex; align-items: center; justify-content: center; font-size: 1.5rem;
}
.contact-card-icon.blue   { background: var(--primary-light); color: var(--primary); }
.contact-card-icon.orange { background: #fef3ea; color: var(--accent); }
.contact-card-icon.green  { background: #e8f5e9; color: #43a047; }
.contact-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.contact-card p  { font-size: 0.87rem; color: var(--text-gray); line-height: 1.75; margin-bottom: 14px; }
.contact-card .contact-val { font-size: 1rem; font-weight: 700; color: var(--primary); }

/* 联系表单 */
.contact-form-section {
  background: #fff; border-radius: var(--radius-lg); padding: 40px 40px; box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}
.contact-form-section h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 6px; }
.contact-form-section > p { color: var(--text-gray); font-size: 0.9rem; margin-bottom: 28px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.88rem; font-weight: 600; color: var(--text-mid); }
.form-group input,
.form-group select,
.form-group textarea {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 11px 14px; font-size: 0.9rem; color: var(--text-dark);
  transition: border-color 0.2s, box-shadow 0.2s; outline: none; background: var(--bg-light);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,111,196,0.12); background: #fff;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { margin-top: 8px; }
.form-note { font-size: 0.82rem; color: var(--text-gray); margin-top: 12px; }

/* =================================================================
   侧边导航
   ================================================================= */
.support-nav { position: sticky; top: 90px; }
.support-nav-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.support-nav-card h3 {
  padding: 16px 20px; font-size: 0.93rem; font-weight: 700;
  background: var(--primary-dark); color: #fff;
}
.support-nav-card ul { padding: 8px 0; }
.support-nav-card li a {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 20px; font-size: 0.9rem; color: var(--text-mid);
  border-left: 3px solid transparent; transition: all 0.2s;
}
.support-nav-card li a:hover,
.support-nav-card li a.active {
  background: var(--primary-light); color: var(--primary);
  border-left-color: var(--primary);
}
.support-nav-card li a i { width: 16px; text-align: center; font-size: 0.85rem; }

/* =================================================================
   响应式
   ================================================================= */
@media (max-width: 1024px) {
  .contact-cards { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .support-layout    { grid-template-columns: 1fr; }
  .support-nav       { position: static; }
  .contact-cards     { grid-template-columns: 1fr; gap: 16px; }
  .form-grid         { grid-template-columns: 1fr; }
  .contact-form-section { padding: 28px 20px; }
}