/* ========================================
   solutions.css - 解决方案页面样式
   ======================================== */

/* ---------- 方案总览 ---------- */
.solutions-intro {
  padding: 35px 0;
  text-align: center;
}

.solutions-intro-desc {
  max-width: 800px;
  margin: 0 auto;
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.9;
}

/* ---------- 方案导航 ---------- */
.solutions-nav {
  position: sticky;
  top: var(--header-height);
  z-index: 50;
  background: white;
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.solutions-nav-inner {
  max-width: 98vw;
  margin: 0 auto;
  padding: 0 1vw;
  display: flex;
  gap: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.solutions-nav-inner::-webkit-scrollbar { display: none; }

.sol-nav-link {
  padding: 18px 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  flex-shrink: 0;
}

.sol-nav-link:hover,
.sol-nav-link.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

/* ---------- 方案详情 ---------- */
.solution-detail {
  padding: 30px 0;
}

.solution-detail:nth-child(even) {
  background: var(--bg-light);
}

.solution-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.solution-detail:nth-child(even) .solution-detail-grid {
  direction: rtl;
}

.solution-detail:nth-child(even) .solution-detail-grid > * {
  direction: ltr;
}

.solution-detail-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.solution-detail-image img {
  width: 100%;
  height: 508px;
  object-fit: cover;
  display: block;
}

.solution-detail-content .sol-tag {
  display: inline-block;
  padding: 5px 14px;
  background: rgba(126,182,59,0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  border-radius: 50px;
  margin-bottom: 14px;
}

.solution-detail-content h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.solution-detail-content .sol-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* 痛点列表 */
.pain-points {
  margin-bottom: 24px;
}

.pain-points h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.pain-point-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.pain-point-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 8px;
  flex-shrink: 0;
}

/* 方案亮点 */
.solution-highlights {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.solution-detail:nth-child(even) .highlight-item {
  background: white;
}

.highlight-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(126,182,59,0.1), rgba(0,200,83,0.08));
  color: var(--primary);
  font-size: 16px;
  flex-shrink: 0;
}

/* 效益数据 */
.solution-benefits {
  display: flex;
  gap: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
}

.benefit-item {
  text-align: center;
}

.benefit-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  font-family: var(--font-en);
  line-height: 1;
}

.benefit-label {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 4px;
}

/* ---------- EMS平台 ---------- */
.ems-section {
  padding: 100px 0;
  background: var(--bg-dark);
  overflow: hidden;
}

.ems-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ems-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
}

.ems-content .ems-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
  margin-bottom: 30px;
}

.ems-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ems-feature {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.ems-feature:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(126,182,59,0.3);
}

.ems-feature-icon {
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(126,182,59,0.3), rgba(0,200,83,0.2));
  color: white;
  font-size: 18px;
  flex-shrink: 0;
}

.ems-feature-text h4 {
  font-size: 16px;
  font-weight: 700;
  color: white;
  margin-bottom: 4px;
}

.ems-feature-text p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.6;
}

.ems-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.ems-image img {
  width: 100%;
  height: auto;
}

.ems-actions {
  display: flex;
  gap: 16px;
  margin-top: 30px;
}

/* ---------- 智能测算工具 ---------- */
.calculator-section {
  padding: 60px 0;
  background: white;
}

.calculator-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.calc-card {
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  border: 1px solid transparent;
  transition: var(--transition);
}

.calc-card:hover {
  background: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-5px);
}

.calc-card-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.calc-card h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.calc-card > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.calc-features {
  text-align: left;
  margin-bottom: 24px;
}

.calc-features li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  border-bottom: 1px solid var(--border-color);
}

.calc-features li:last-child {
  border-bottom: none;
}

.calc-card .btn-block {
  width: 100%;
}

/* ---------- 常见问题 ---------- */
.sol-faq-section {
  padding: 60px 0;
  background: var(--bg-light);
}

.sol-faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.sol-faq-item {
  background: white;
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.sol-faq-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.sol-faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 14px;
}

.sol-faq-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary), #003D7A);
  color: white;
  font-size: 14px;
  font-weight: 800;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sol-faq-q h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
}

.sol-faq-a {
  padding-left: 0px;
}

.sol-faq-a p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .solution-detail-grid { grid-template-columns: 1fr; gap: 40px; }
  .solution-detail:nth-child(even) .solution-detail-grid { direction: ltr; }
  .ems-grid { grid-template-columns: 1fr; }
  .sol-faq-grid { grid-template-columns: 1fr; }
  .calculator-cards { grid-template-columns: 1fr; }
  .ems-actions { flex-direction: column; }
}

@media (max-width: 768px) {
  .solution-detail-content h2 { font-size: 26px; }
  .solution-highlights { grid-template-columns: 1fr; }
  .solution-benefits { flex-wrap: wrap; gap: 20px; }
  .sol-nav-link { padding: 14px 20px; font-size: 14px; }
  .ems-content h2 { font-size: 26px; }
  .solution-detail-image img { height: 260px; }
  .sol-faq-item { padding: 20px; }
  .sol-faq-a { padding-left: 0; margin-top: 10px; }
}

/* =============================================
   CTA 区域样式（与 projects.css 保持一致）
   ============================================= */

/* 去除背景色，继承页面背景 */
.cta-section--dark {
  background: transparent;
  padding: 60px 0;
  text-align: left;
}
.cta-section--dark::before { display: none; }

/* 内联布局：文字左，按钮右 */
.cta-content--inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-text { flex: 1; }
.cta-section--dark .cta-title {
  color: var(--text-primary);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}
.cta-section--dark .cta-desc {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0;
  max-width: none;
}

/* 按钮组右对齐，统一样式 */
.cta-actions--right {
  display: flex;
  gap: 16px;
  justify-content: flex-end;
  flex-shrink: 0;
}
.cta-actions--right .btn {
  border: 1px solid var(--primary);
  background: transparent;
  color: var(--primary);
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: all 0.25s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.cta-actions--right .btn:hover {
  background: var(--primary);
  color: #fff;
}

/* 响应式：移动端上下堆叠 */
@media (max-width: 768px) {
  .cta-section--dark { padding: 48px 0; }
  .cta-content--inline {
    flex-direction: column;
    text-align: center;
    gap: 24px;
  }
  .cta-section--dark .cta-title { font-size: 22px; }
  .cta-section--dark .cta-desc { font-size: 14px; }
  .cta-actions--right {
    justify-content: center;
    width: 100%;
  }
  .cta-actions--right .btn {
    flex: 1;
    justify-content: center;
    max-width: 200px;
  }
}