/* ── RAG 页专属样式 ── */

/* 核心诉求 */
.demand-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.demand-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  display: flex; gap: 20px; align-items: flex-start;
  transition: all 0.3s;
  position: relative; overflow: hidden;
}
.demand-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 3px; height: 100%;
  background: linear-gradient(180deg, var(--brand), var(--cyan));
}
.demand-card:hover {
  border-color: var(--border-hi);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  transform: translateX(4px);
}
.demand-icon-wrap {
  width: 52px; height: 52px; flex-shrink: 0;
  background: var(--bg-raised); border: 1px solid var(--border-hi);
  display: flex; align-items: center; justify-content: center; font-size: 22px;
}
.demand-body {}
.demand-title { font-size: 16px; font-weight: 700; color: var(--text-hi); margin-bottom: 8px; }
.demand-desc { font-size: 13px; color: var(--text-md); line-height: 1.8; }
.demand-metric {
  display: flex; gap: 24px; margin-top: 12px;
}
.dm-val {
  display: flex; flex-direction: column; align-items: center;
  padding: 8px 16px; background: var(--bg-raised); border: 1px solid var(--border);
}
.dm-num {
  font-family: var(--font-en); font-size: 22px; font-weight: 700;
  color: var(--brand); line-height: 1;
}
.dm-label { font-size: 10px; color: var(--text-lo); margin-top: 4px; }

/* 技术架构图 */
.arch-diagram {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 40px;
  position: relative;
}
.arch-layers {
  display: flex; flex-direction: column; gap: 0;
}
.arch-row {
  display: grid; grid-template-columns: 120px 1fr;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}
.arch-row:last-child { border-bottom: none; }
.arch-layer-label {
  padding: 20px 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; font-family: var(--font-en);
  color: var(--brand); border-right: 1px solid var(--line);
  writing-mode: initial; text-align: center;
}
.arch-layer-content {
  padding: 20px 24px;
  display: flex; gap: 12px; flex-wrap: wrap; align-items: center;
}
.arch-node {
  background: var(--bg-raised); border: 1px solid var(--border-hi);
  padding: 10px 18px;
  display: flex; flex-direction: column; gap: 2px;
  min-width: 120px; transition: all 0.2s;
}
.arch-node:hover {
  border-color: var(--brand);
  box-shadow: 0 0 16px var(--brand-glow);
}
.arch-node strong { font-size: 13px; font-weight: 700; color: var(--text-hi); }
.arch-node small { font-size: 10px; color: var(--text-lo); font-family: var(--font-en); }
.arch-connector {
  display: flex; align-items: center; gap: 8px;
  padding: 0 8px; color: var(--text-lo); font-size: 13px;
}
.arch-badge {
  font-size: 10px; font-weight: 700; padding: 3px 10px;
  font-family: var(--font-en); letter-spacing: 1px;
}
.arch-badge-blue { background: rgba(14,165,233,0.15); color: var(--brand); border: 1px solid rgba(14,165,233,0.3); }
.arch-badge-cyan { background: rgba(34,211,238,0.12); color: var(--cyan); border: 1px solid rgba(34,211,238,0.25); }

/* RAG 处理流程 */
.flow-steps {
  display: flex; gap: 0; align-items: stretch;
  overflow-x: auto;
}
.flow-step {
  flex: 1; min-width: 160px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-right: none;
  padding: 28px 20px; text-align: center;
  position: relative; transition: all 0.3s;
}
.flow-step:last-child { border-right: 1px solid var(--border); }
.flow-step:hover { background: var(--bg-raised); border-color: var(--border-hi); }
.flow-step-num {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--bg-raised); border: 2px solid var(--brand);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-size: 14px; font-weight: 700;
  color: var(--brand); margin: 0 auto 14px;
}
.flow-step-title { font-size: 14px; font-weight: 700; color: var(--text-hi); margin-bottom: 8px; }
.flow-step-desc { font-size: 12px; color: var(--text-lo); line-height: 1.6; }
.flow-step-arrow {
  position: absolute; right: -14px; top: 50%;
  transform: translateY(-50%);
  width: 0; height: 0;
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  border-left: 14px solid var(--border-hi);
  z-index: 2;
}
.flow-step:last-child .flow-step-arrow { display: none; }

/* 四大优势 */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px;
  transition: all 0.3s;
  position: relative; overflow: hidden;
}
.adv-card-top {
  display: flex; align-items: flex-start; gap: 16px; margin-bottom: 20px;
}
.adv-num {
  font-family: var(--font-en); font-size: 48px; font-weight: 700;
  color: var(--border-hi); line-height: 1; flex-shrink: 0;
}
.adv-head {}
.adv-title { font-size: 17px; font-weight: 700; color: var(--text-hi); margin-bottom: 4px; }
.adv-en { font-size: 10px; font-weight: 600; color: var(--brand); letter-spacing: 2px; font-family: var(--font-en); }
.adv-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.adv-list li {
  font-size: 13px; color: var(--text-md); line-height: 1.7;
  display: flex; gap: 8px; align-items: flex-start;
}
.adv-list li::before {
  content: '•'; color: var(--brand); flex-shrink: 0; font-size: 16px; line-height: 1.2;
}
.adv-card:hover {
  border-color: var(--border-hi);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
}
.adv-card:hover .adv-num { color: rgba(14,165,233,0.2); }

/* 应用场景 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px 28px;
  transition: all 0.3s;
}
.scenario-card:hover {
  border-color: var(--border-hi);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  transform: translateY(-4px);
}
.scenario-icon { font-size: 28px; margin-bottom: 14px; display: block; }
.scenario-tag {
  font-size: 9px; font-weight: 700; letter-spacing: 3px;
  text-transform: uppercase; color: var(--text-lo);
  font-family: var(--font-en); margin-bottom: 8px;
}
.scenario-title { font-size: 16px; font-weight: 700; color: var(--text-hi); margin-bottom: 12px; }
.scenario-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.scenario-list li {
  font-size: 12px; color: var(--text-md); line-height: 1.6;
  display: flex; gap: 8px;
}
.scenario-list li::before {
  content: '▸'; color: var(--brand); flex-shrink: 0;
}

/* 服务模式 */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 32px 28px;
  text-align: center;
  transition: all 0.3s;
  position: relative; overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s;
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
  border-color: var(--border-hi);
  box-shadow: 0 12px 40px rgba(0,0,0,0.25);
  transform: translateY(-4px);
}
.service-icon { font-size: 32px; margin-bottom: 16px; display: block; }
.service-title { font-size: 16px; font-weight: 700; color: var(--text-hi); margin-bottom: 4px; }
.service-en { font-size: 10px; font-weight: 600; color: var(--brand); letter-spacing: 2px; font-family: var(--font-en); margin-bottom: 14px; display: block; }
.service-desc { font-size: 13px; color: var(--text-md); line-height: 1.8; margin-bottom: 16px; }
.service-tag { font-size: 11px; color: var(--cyan); font-weight: 600; }

/* 选型评分 */
.rating-table {
  background: var(--bg-card);
  border: 1px solid var(--border);
  overflow: hidden;
}
.rating-table table {
  width: 100%; border-collapse: collapse;
}
.rating-table th {
  padding: 16px 24px;
  text-align: left;
  font-size: 12px; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--text-md);
  font-family: var(--font-en);
  background: var(--bg-raised);
  border-bottom: 1px solid var(--border-hi);
}
.rating-table td {
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.rating-table tr:last-child td { border-bottom: none; }
.rating-table tr:hover td { background: rgba(14,165,233,0.03); }
.rating-item { font-weight: 600; color: var(--text-hi); }
.rating-stars { color: var(--brand); font-size: 16px; letter-spacing: 2px; }
.rating-note { font-size: 12px; color: var(--text-lo); margin-top: 3px; }

@media (max-width: 1100px) {
  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .service-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .demand-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .flow-steps { flex-direction: column; }
  .flow-step { border-right: 1px solid var(--border); border-bottom: none; }
  .flow-step:last-child { border-bottom: 1px solid var(--border); }
  .flow-step-arrow {
    right: auto; top: auto; bottom: -14px; left: 50%;
    transform: translateX(-50%) rotate(90deg);
    border-left: 12px solid transparent;
    border-right: 12px solid transparent;
    border-top: 14px solid var(--border-hi);
  }
  .arch-row { grid-template-columns: 80px 1fr; }
  .arch-diagram { padding: 24px 20px; }
  .demand-card { padding: 24px 20px; }
}
@media (max-width: 600px) {
  .demand-metric { flex-wrap: wrap; gap: 12px; }
  .adv-card { padding: 24px 20px; }
  .adv-num { font-size: 36px; }
  .arch-layer-content { flex-wrap: wrap; gap: 8px; }
  .arch-node { min-width: 100px; }
  .rating-table { overflow-x: auto; }
  .rating-table table { min-width: 480px; }
  .flow-step { padding: 20px 16px; }
  .scenario-card { padding: 24px 20px; }
  .service-card { padding: 24px 20px; }
}