/* === AI 需求分析样式 === */

/* —— 输入区（在 Hero 内，窄宽）—— */
.ai-input-wrapper{max-width:700px;margin:0 auto;width:100%}
.ai-requirement-input{width:100%;padding:16px 20px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-card);color:var(--text-primary);font-size:15px;font-family:var(--font-family);resize:none;outline:none;transition:border-color .2s,box-shadow .2s;line-height:1.6}
.ai-requirement-input:focus{border-color:var(--accent-cyan);box-shadow:0 0 0 3px rgba(0,212,255,.1)}
.ai-requirement-input::placeholder{color:var(--text-secondary);opacity:.5}
.ai-input-actions{display:flex;align-items:center;justify-content:space-between;margin-top:12px}
.ai-char-count{font-size:12px;color:var(--text-secondary)}
.ai-analyze-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:linear-gradient(135deg,var(--accent-cyan) 0%,var(--accent-purple) 100%);color:#fff;border:none;border-radius:12px;font-size:15px;font-weight:600;cursor:pointer;transition:transform .15s,box-shadow .15s;font-family:var(--font-family);white-space:nowrap}
.ai-analyze-btn:hover{transform:translateY(-1px);box-shadow:var(--glow-cyan)}
.ai-analyze-btn:disabled{opacity:.6;cursor:not-allowed;transform:none}
.ai-examples{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;justify-content:center}
.ai-examples span{padding:8px 16px;background:var(--bg-card);border:1px solid var(--border-color);border-radius:20px;font-size:13px;cursor:pointer;transition:all .15s;white-space:nowrap;color:var(--text-secondary);font-family:var(--font-family)}
.ai-examples span:hover{background:var(--accent-cyan);color:#000;border-color:var(--accent-cyan)}

/* —— 加载状态 —— */
.ai-loading{display:flex;align-items:center;gap:12px;padding:24px;margin-top:32px;background:var(--bg-card);border-radius:12px;max-width:480px;margin-left:auto;margin-right:auto}
.ai-loading-dot{width:8px;height:8px;background:var(--accent-cyan);border-radius:50%;animation:ai-pulse 1.4s ease-in-out infinite}
@keyframes ai-pulse{0%,100%{opacity:.3;transform:scale(1)}50%{opacity:1;transform:scale(1.6)}}
#ai-loading-text{font-size:14px;color:var(--text-secondary);font-family:var(--font-family)}

/* —— 结果区：全宽容器，不受 hero-content(800px) 限制 —— */
#ai-result{width:100%;max-width:var(--max-width);margin:40px auto 0;padding:0 24px;text-align:left;display:none;box-sizing:border-box}

/* ================================================================
   1. 产品结构图（树形层次）
   ================================================================ */
.ai-structure{background:var(--bg-card);border-radius:16px;padding:40px;margin-bottom:32px}
.ai-structure-title{font-size:18px;font-weight:700;color:var(--text-primary);margin:0 0 32px;font-family:var(--font-family);display:flex;align-items:center;gap:10px}
.ai-structure-title::before{content:'';display:inline-block;width:4px;height:22px;background:var(--accent-gradient);border-radius:2px}

/* 树形根节点 */
.ai-tree{display:flex;flex-direction:column;align-items:center;gap:0}
.ai-tree-root{display:flex;justify-content:center;padding-bottom:4px}
.ai-tree-node{display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border-radius:10px;font-family:var(--font-family)}
.ai-tree-node-root{background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple));color:#fff;font-size:16px;font-weight:700;padding:14px 32px}
.ai-tree-node-root .ai-tree-node-icon{display:flex;align-items:center}
.ai-tree-node-root .ai-tree-node-icon svg{width:20px;height:20px}
.ai-tree-node-icon svg{width:16px;height:16px}

/* 树枝连接线区域 */
.ai-tree-branches{display:flex;justify-content:center;gap:28px;flex-wrap:wrap;margin-top:0;padding-top:24px;position:relative}
.ai-tree-branches::before{content:'';position:absolute;top:0;left:12%;right:12%;height:2px;background:var(--border-color)}

/* 每个分类分支 */
.ai-tree-branch{display:flex;flex-direction:column;align-items:center;min-width:200px;flex:1;max-width:400px;position:relative}
.ai-tree-branch-line{width:2px;height:24px;background:var(--border-color)}
.ai-tree-node-category{background:var(--bg-primary);border:1px solid var(--border-color);font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:14px;gap:8px;padding:10px 18px}
.ai-tree-node-count{font-size:11px;color:var(--text-secondary);font-weight:400;background:var(--bg-secondary);padding:2px 10px;border-radius:10px}

/* 叶子节点列表 */
.ai-tree-leaves{display:flex;flex-direction:column;gap:8px;width:100%}
.ai-tree-leaf{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--bg-primary);border-radius:8px;font-size:13px;font-family:var(--font-family);position:relative;transition:background .15s}
.ai-tree-leaf:hover{background:var(--bg-secondary)}
.ai-tree-leaf-line{display:none}
.ai-tree-leaf-text{flex:1;color:var(--text-primary);line-height:1.5;min-width:0;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.ai-tree-leaf-badge{font-size:10px;font-weight:700;padding:2px 8px;border-radius:5px;text-transform:uppercase;flex-shrink:0}
@media(max-width:900px){.ai-tree-branches{flex-direction:column;align-items:stretch;gap:0}.ai-tree-branches::before{display:none}.ai-tree-branch{max-width:none}.ai-tree-branch-line{display:none}.ai-tree-node-category{margin-top:10px}}

/* ================================================================
   2. 产品方案总览卡片
   ================================================================ */
.ai-overview{background:var(--bg-card);border-radius:16px;padding:36px;margin-bottom:32px}
.ai-overview-header{display:flex;align-items:flex-start;gap:20px;margin-bottom:0}
.ai-overview-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,var(--accent-cyan),var(--accent-purple));display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#fff}
.ai-overview-icon svg{width:26px;height:26px}
.ai-overview-title{font-size:24px;font-weight:700;color:var(--text-primary);margin:0 0 6px;font-family:var(--font-family)}
.ai-overview-subtitle{font-size:14px;color:var(--text-secondary);font-family:var(--font-family);margin:0}
.ai-overview-meta{display:flex;gap:28px;margin-top:12px;flex-wrap:wrap}
.ai-overview-stat{font-size:13px;color:var(--text-secondary);display:flex;align-items:center;gap:6px;font-family:var(--font-family)}
.ai-overview-stat svg{width:14px;height:14px;color:var(--accent-cyan)}

/* ================================================================
   3. 三阶段产品方案卡片
   ================================================================ */
.ai-phases{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:20px}
@media(max-width:900px){.ai-phases{grid-template-columns:1fr}}
.ai-phase-card{background:var(--bg-primary);border-radius:14px;padding:24px;border:1px solid transparent;transition:border-color .2s}
.ai-phase-card:hover{border-color:var(--border-hover)}
.ai-phase-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.ai-phase-badge{font-size:12px;font-weight:700;padding:4px 12px;border-radius:6px;text-transform:uppercase;letter-spacing:.5px;white-space:nowrap}
.badge-mvp{background:rgba(0,212,255,.12);color:var(--accent-cyan)}
.badge-enhance{background:rgba(139,92,246,.12);color:var(--accent-purple)}
.badge-polish{background:rgba(245,158,11,.12);color:#f59e0b}
.ai-phase-title{font-size:13px;color:var(--text-secondary);font-family:var(--font-family)}
.ai-phase-items{display:flex;flex-direction:column;gap:8px}
.ai-phase-item{padding:10px 12px;border-radius:8px;font-size:13px;line-height:1.5;font-family:var(--font-family);display:flex;align-items:flex-start;gap:10px}
.ai-phase-item .pri-dot{width:7px;height:7px;border-radius:50%;margin-top:6px;flex-shrink:0}
.pri-dot-p0{background:#ef4444}
.pri-dot-p1{background:#f59e0b}
.pri-dot-p2{background:#6b7280}
.ai-phase-item .item-text{color:var(--text-primary);flex:1}
.ai-phase-item .item-cat{font-size:10px;color:var(--text-secondary);background:rgba(255,255,255,.06);padding:2px 8px;border-radius:4px;white-space:nowrap}

/* ================================================================
   4. 匹配结果网格（聚合展示，无 Tab）
   ================================================================ */
.ai-matches-section{margin-bottom:40px}
.ai-matches-section-title{font-size:17px;font-weight:700;color:var(--text-primary);margin:0 0 20px;font-family:var(--font-family);display:flex;align-items:center;gap:10px}
.ai-matches-section-title::before{content:'';display:inline-block;width:4px;height:18px;background:var(--accent-gradient);border-radius:2px;flex-shrink:0}
.ai-matches-section-title svg{width:18px;height:18px;color:var(--accent-cyan);display:none}
.ai-matches-count{font-size:12px;font-weight:400;color:var(--text-secondary);background:var(--bg-card);padding:3px 12px;border-radius:10px;margin-left:auto}

/* 网格容器（4 列 → 响应式） */
.ai-matches-grid-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;width:100%}
@media(max-width:1024px){.ai-matches-grid-cards{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.ai-matches-grid-cards{grid-template-columns:1fr}}

/* 网格卡片 */
.ai-grid-card{display:flex;flex-direction:column;gap:14px;padding:24px;background:var(--bg-card);border-radius:14px;text-decoration:none;transition:all .2s;border:1px solid transparent;min-width:0}
.ai-grid-card:hover{background:var(--bg-secondary);border-color:var(--border-hover);transform:translateY(-2px)}
.ai-grid-card-icon{width:44px;height:44px;border-radius:12px;background:rgba(0,212,255,.08);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent-cyan);overflow:hidden}
.ai-grid-card-icon svg{width:22px;height:22px}
.ai-grid-card-icon img.ai-grid-img{width:26px;height:26px;object-fit:contain;border-radius:6px}
.ai-grid-card-project .ai-grid-card-icon{background:rgba(139,92,246,.08);color:var(--accent-purple)}
.ai-grid-card-body{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}
.ai-grid-card-name{font-size:15px;font-weight:600;color:var(--text-primary);line-height:1.3;font-family:var(--font-family);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ai-grid-card:hover .ai-grid-card-name{color:var(--accent-cyan)}
.ai-grid-card-project:hover .ai-grid-card-name{color:var(--accent-purple)}
.ai-grid-card-reason{font-size:12px;color:var(--text-secondary);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-family:var(--font-family)}
.ai-grid-card-arrow{display:flex;align-items:center;justify-content:flex-end;color:var(--text-secondary);opacity:0;transition:opacity .2s}
.ai-grid-card-arrow svg{width:14px;height:14px}
.ai-grid-card:hover .ai-grid-card-arrow{opacity:1;color:var(--accent-cyan)}
.ai-grid-card-stars{font-size:12px;color:#f59e0b;font-weight:600;font-family:var(--font-family);display:flex;align-items:center;gap:3px;flex-shrink:0}

/* 空状态 */
.ai-empty{text-align:center;padding:32px;color:var(--text-secondary);font-size:14px;background:var(--bg-primary);border-radius:12px;font-family:var(--font-family)}

/* ================================================================
   5. 底部操作栏
   ================================================================ */
.ai-actions-bar{display:flex;gap:12px;margin-top:32px;justify-content:center;padding-bottom:16px}
.ai-actions-bar button{padding:12px 28px;border:1px solid var(--border-color);border-radius:12px;background:var(--bg-card);color:var(--text-secondary);font-size:14px;cursor:pointer;transition:all .15s;font-family:var(--font-family);display:flex;align-items:center;gap:8px}
.ai-actions-bar button:hover{border-color:var(--accent-cyan);color:var(--accent-cyan)}
.ai-actions-bar button svg{width:15px;height:15px}