/* ===== 解决方案 ===== */
.solutions {
  background: linear-gradient(180deg, #0B1120 0%, var(--color-bg) 100%);
}

.solutions__inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 40px;
  align-items: start;
}

/* Tab 列表 */
.solutions__tabs {
  display: flex;
  flex-direction: column;
  gap: 8px;
  position: sticky;
  top: 100px;
}

.solutions__tab {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-align: left;
}
.solutions__tab:hover {
  color: var(--color-text);
  background: rgba(255,255,255,0.04);
}
.solutions__tab--active {
  color: var(--color-text);
  background: rgba(0,102,255,0.12);
  border-color: var(--color-border);
}
.solutions__tab-icon { flex-shrink: 0; }
.solutions__tab--active .solutions__tab-icon { color: var(--color-accent); }

/* 内容面板 */
.solutions__panel {
  display: none;
  animation: fadeInUp 0.4s ease;
}
.solutions__panel--active { display: block; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.solutions__panel-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.solutions__panel-text h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.solutions__panel-text > p {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 24px;
}

.solutions__features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.solutions__features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-muted);
}
.solutions__feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--grad-primary);
  flex-shrink: 0;
}

.solutions__tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* 右侧可视化卡片 */
.solutions__visual-card {
  padding: 24px;
}
.solutions__visual-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  font-size: 12px;
  color: var(--color-text-muted);
}
.solutions__visual-dots { display: flex; gap: 5px; }
.solutions__visual-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--color-border);
}
.solutions__visual-dots span:nth-child(1) { background: #ff5f57; }
.solutions__visual-dots span:nth-child(2) { background: #febc2e; }
.solutions__visual-dots span:nth-child(3) { background: #28c840; }

.solutions__visual-chart {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  height: 120px;
  margin-bottom: 20px;
}
.solutions__chart-bar {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
}
.solutions__chart-bar::before {
  content: '';
  width: 100%;
  height: var(--h);
  background: var(--grad-primary);
  border-radius: 4px 4px 0 0;
  opacity: 0.7;
  transition: height 0.8s ease, opacity var(--transition);
}
.solutions__chart-bar:hover::before { opacity: 1; }
.solutions__chart-bar span { font-size: 11px; color: var(--color-text-muted); }

.solutions__visual-stats {
  display: flex;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-dim);
}
.solutions__visual-stats div { display: flex; flex-direction: column; gap: 2px; }
.solutions__visual-stats strong {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--grad-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.solutions__visual-stats span { font-size: 12px; color: var(--color-text-muted); }