/* ============================================================
   common.css — 北京中环盛达 · 全站公共样式
   适用范围：所有页面均引用此文件
   注意：hero-bg 图片路径使用相对于各页面的路径，
         如需统一可在各页面用内联 style 覆盖 .hero-bg
   ============================================================ */

/* ===== RESET & ROOT ===== */
.legacy-technology *{margin:0;padding:0;box-sizing:border-box}
.legacy-technology{
  --g:#1a7c4f;--g2:#0f5c38;--g3:#2ea06a;--gl:#e8f5ee;--gb:#b3d9c7;
  --ink:#1a1a1a;--ink2:#3d3d3d;--gray:#6b7280;--gray2:#9ca3af;
  --line:#e5e7eb;--bg:#fafaf8;--white:#fff;
  --amber:#b45309;--amber-l:#fef3c7;--amber2:#d97706;
  --blue:#1a5c8f;--blue-l:#e6f1fb;
  --red:#dc2626;--red-l:#fef2f2;
  --purple:#6d28d9;--purple-l:#f5f3ff;
  --slate:#475569;--slate-l:#f1f5f9;
}
.legacy-technology{scroll-behavior:smooth}
.legacy-technology{font-family:'Noto Sans SC',sans-serif;color:var(--ink);background:var(--bg);font-size:15px;line-height:1.7}
.legacy-technology a{text-decoration:none;color:inherit}

/* ===== NAV ===== */
.legacy-technology nav{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:200;padding:0 40px}
.legacy-technology .nav-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;height:64px;gap:32px}
.legacy-technology .logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.legacy-technology .logo-icon{width:38px;height:38px;background:var(--g);border-radius:8px;display:flex;align-items:center;justify-content:center}
.legacy-technology .logo-icon svg{width:22px;height:22px;fill:#fff}
.legacy-technology .logo-text{font-family:'Noto Serif SC',serif;font-size:15px;font-weight:700;line-height:1.3}
.legacy-technology .logo-sub{font-size:11px;color:var(--gray)}
.legacy-technology .nav-links{display:flex;flex:1;justify-content:center}
.legacy-technology .nav-links a{padding:0 15px;height:64px;display:flex;align-items:center;font-size:14px;color:var(--ink2);border-bottom:2px solid transparent;transition:.2s;white-space:nowrap}
.legacy-technology .nav-links a:hover,.legacy-technology .nav-links a.active{color:var(--g);border-bottom-color:var(--g)}
.legacy-technology .nav-cta{background:var(--g);color:#fff;padding:8px 20px;border-radius:6px;font-size:13px;font-weight:500;white-space:nowrap;flex-shrink:0}
.legacy-technology .nav-cta:hover{background:var(--g2)}

/* 面包屑 */
.legacy-technology .bc{background:#fff;border-bottom:1px solid var(--line);padding:10px 40px}
.legacy-technology .bc-inner{max-width:1280px;margin:0 auto;font-size:12px;color:var(--gray);display:flex;gap:6px;flex-wrap:wrap}
.legacy-technology .bc-inner a{color:var(--g)}

/* ===== HERO（通用结构，各页面可覆盖背景图） ===== */
.legacy-technology .hero{background:none;color:#fff;padding:60px 40px 56px;position:relative;overflow:hidden}
.legacy-technology .hero-bg{position:absolute;inset:0;background:url('../images/hero-bg-company.jpg') center/cover no-repeat;transform:scale(1.04);animation:hero-breathe 16s ease infinite;will-change:transform;z-index:0}
@keyframes hero-breathe{
  0%{transform:scale(1.04)}
  50%{transform:scale(1)}
  100%{transform:scale(1.04)}
}
.legacy-technology .hero::before{content:'';position:absolute;inset:0;background:linear-gradient(120deg,rgba(5,28,18,0.78) 0%,rgba(8,40,24,0.55) 45%,rgba(6,32,20,0.50) 65%,rgba(5,28,18,0.72) 100%);z-index:1;pointer-events:none}
.legacy-technology .hero::after{content:'';position:absolute;right:-80px;top:-80px;width:500px;height:500px;border-radius:50%;border:1px solid rgba(255,255,255,.05);pointer-events:none;z-index:2}
.legacy-technology .hero-inner{max-width:1280px;margin:0 auto;position:relative;z-index:3;display:grid;grid-template-columns:1fr 400px;gap:60px;align-items:center}
.legacy-technology .hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:100px;padding:5px 14px;font-size:12px;margin-bottom:18px}
.legacy-technology .badge-dot{width:6px;height:6px;background:#4ade80;border-radius:50%;animation:pulse 2s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.6;transform:scale(1.4)}}
.legacy-technology .hero h1{font-family:'Noto Serif SC',serif;font-size:36px;font-weight:700;line-height:1.35;margin-bottom:16px}
.legacy-technology .hero h1 em{font-style:normal;color:#6ee7a8}
.legacy-technology .hero-desc{color:rgba(255,255,255,.72);font-size:14px;line-height:1.95;margin-bottom:28px}
.legacy-technology .hero-steps{display:flex;flex-direction:column;gap:10px}
.legacy-technology .hero-step{display:flex;align-items:center;gap:12px;font-size:13px;color:rgba(255,255,255,.8)}
.legacy-technology .hs-num{width:24px;height:24px;border-radius:6px;background:rgba(110,231,168,.2);border:1px solid rgba(110,231,168,.4);color:#6ee7a8;font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.legacy-technology .hero-card{background:rgba(255,255,255,.08);backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:28px;position:relative}
.legacy-technology .hero-card-title{font-size:13px;font-weight:700;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:.08em;margin-bottom:16px}
.legacy-technology .hc-item{display:flex;align-items:center;gap:14px;padding:12px 14px;border-radius:10px;cursor:pointer;transition:.2s;margin-bottom:4px}
.legacy-technology .hc-item:hover{background:rgba(255,255,255,.1)}
.legacy-technology .hc-item.active-tech{background:rgba(110,231,168,.15);border:1px solid rgba(110,231,168,.3)}
.legacy-technology .hc-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.legacy-technology .hc-icon.green{background:rgba(110,231,168,.2)}
.legacy-technology .hc-icon.amber{background:rgba(251,191,36,.2)}
.legacy-technology .hc-icon.blue{background:rgba(96,165,250,.2)}
.legacy-technology .hc-icon.purple{background:rgba(167,139,250,.2)}
.legacy-technology .hc-name{font-size:14px;font-weight:700;color:#fff;margin-bottom:2px}
.legacy-technology .hc-tag{font-size:11px;color:rgba(255,255,255,.5)}
.legacy-technology .hc-arrow{margin-left:auto;font-size:16px;color:rgba(255,255,255,.3);transition:.2s}
.legacy-technology .hc-item:hover .hc-arrow,.legacy-technology .hc-item.active-tech .hc-arrow{color:#6ee7a8;transform:translateX(3px)}

/* ===== 通用按钮 ===== */
.legacy-technology .btn-primary{background:var(--g);color:#fff;padding:14px 40px;border-radius:9px;font-weight:700;font-size:15px;display:inline-block;transition:.15s}
.legacy-technology .btn-primary:hover{background:var(--g2)}
.legacy-technology .btn-secondary{border:2px solid var(--g);color:var(--g);padding:13px 28px;border-radius:9px;font-size:14px;display:inline-block;margin-left:12px;transition:.15s}
.legacy-technology .btn-secondary:hover{background:var(--gl)}

/* ===== 通用提示框 ===== */
.legacy-technology .tip-box{background:var(--gl);border-left:3px solid var(--g);border-radius:0 8px 8px 0;padding:13px 16px;font-size:13px;color:var(--g2);line-height:1.7;margin:16px 0}
.legacy-technology .warn-box{background:var(--amber-l);border-left:3px solid var(--amber2);border-radius:0 8px 8px 0;padding:13px 16px;font-size:13px;color:var(--amber);line-height:1.7;margin:16px 0}
.legacy-technology .info-box{background:var(--blue-l);border-left:3px solid var(--blue);border-radius:0 8px 8px 0;padding:13px 16px;font-size:13px;color:var(--blue);line-height:1.7;margin:16px 0}

/* ===== 页面底部 CTA ===== */
.legacy-technology .page-cta{background:var(--gl);border-top:1px solid var(--gb);padding:64px 40px;text-align:center}
.legacy-technology .page-cta h3{font-family:'Noto Serif SC',serif;font-size:26px;margin-bottom:10px}
.legacy-technology .page-cta p{color:var(--gray);margin-bottom:32px;font-size:14px;max-width:560px;margin-left:auto;margin-right:auto;line-height:1.8}

/* ===== FOOTER ===== */
.legacy-technology footer{background:#0d1f15;color:rgba(255,255,255,.6);padding:36px 40px 20px}
.legacy-technology .footer-grid{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:28px}
.legacy-technology .footer-col h5{color:#fff;font-size:13px;font-weight:700;margin-bottom:12px}
.legacy-technology .footer-col ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.legacy-technology .footer-col a{font-size:12px;transition:.15s}
.legacy-technology .footer-col a:hover{color:#fff}
.legacy-technology .footer-bottom{max-width:1280px;margin:0 auto;border-top:1px solid rgba(255,255,255,.1);padding-top:16px;display:flex;justify-content:space-between;font-size:11px;flex-wrap:wrap;gap:6px}

/* ===== 回到顶部按钮 ===== */
.legacy-technology .scroll-top{position:fixed;bottom:28px;right:28px;width:42px;height:42px;border-radius:50%;background:var(--g);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:18px;opacity:0;transition:.25s;box-shadow:0 4px 16px rgba(26,124,79,.3);z-index:100;border:none}
.legacy-technology .scroll-top.show{opacity:1}
.legacy-technology .scroll-top:hover{background:var(--g2);transform:translateY(-2px)}

/* ===== 进入动画 ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.legacy-technology .fade-up{animation:fadeUp .5s ease both}
.legacy-technology .fade-up-1{animation-delay:.1s}
.legacy-technology .fade-up-2{animation-delay:.2s}
.legacy-technology .fade-up-3{animation-delay:.3s}

/* ===== 响应式 ===== */
@media(max-width:1100px){.legacy-technology .hero-inner{grid-template-columns:1fr}
  .legacy-technology .hero-card{display:none}
}
@media(max-width:760px){.legacy-technology nav .nav-links{display:none}
  .legacy-technology .hero{padding:44px 20px 40px}
  .legacy-technology .hero h1{font-size:26px}
  .legacy-technology .bc{padding:10px 20px}
  .legacy-technology .btn-secondary{margin-left:0;margin-top:10px}
  .legacy-technology footer{padding:28px 20px 16px}
  .legacy-technology .footer-grid{grid-template-columns:1fr 1fr}
  .legacy-technology .page-cta{padding:44px 20px}
}

/* ============================================================
   faq-tech.css — FAQ技术选型页面专属样式
   依赖：common.css（需先引入）
   适用页面：faq/technology/faq-technology01.html 及同系列页面
   ============================================================ */

/* ===== TOC 导航栏 ===== */
.legacy-technology .toc-bar{background:#fff;border-bottom:2px solid var(--line);padding:0 40px;position:sticky;top:126px;z-index:190;overflow-x:auto}
.legacy-technology .toc-bar::-webkit-scrollbar{height:0}
.legacy-technology .toc-tabs{max-width:1280px;margin:0 auto;display:flex;min-width:max-content}
.legacy-technology .toc-tab{padding:14px 20px;font-size:13px;font-weight:500;color:var(--gray);border-bottom:2px solid transparent;cursor:pointer;white-space:nowrap;margin-bottom:-2px;display:flex;align-items:center;gap:7px;transition:.15s;background:none;border-top:none;border-left:none;border-right:none;font-family:'Noto Sans SC',sans-serif}
.legacy-technology .toc-tab:hover{color:var(--ink)}
.legacy-technology .toc-tab.active{color:var(--g);border-bottom-color:var(--g)}

/* ===== 主体布局 ===== */
.legacy-technology .main-wrap{max-width:1280px;margin:0 auto;padding:56px 40px;display:grid;grid-template-columns:1fr 296px;gap:52px;align-items:start}

/* ===== 内容区段 ===== */
.legacy-technology .content-section{margin-bottom:72px;scroll-margin-top:140px}
.legacy-technology .content-section:last-child{margin-bottom:0}
.legacy-technology .sec-eyebrow{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.legacy-technology .sec-step-badge{background:var(--g);color:#fff;border-radius:8px;padding:3px 10px;font-size:11px;font-weight:700;letter-spacing:.05em}
.legacy-technology .sec-divider{flex:1;height:1px;background:var(--line)}
.legacy-technology .sec-title{font-family:'Noto Serif SC',serif;font-size:26px;font-weight:700;margin-bottom:8px;line-height:1.35}
.legacy-technology .sec-title em{font-style:normal;color:var(--g)}
.legacy-technology .sec-subtitle{font-size:14px;color:var(--gray);margin-bottom:28px;line-height:1.7}

/* ===== 交互选型工具（Wizard） ===== */
.legacy-technology .wizard{background:#fff;border:1.5px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,.06)}
.legacy-technology .wizard-header{background:linear-gradient(135deg,#0f3d22,#1a5c38);padding:24px 28px;color:#fff}
.legacy-technology .wizard-header h3{font-family:'Noto Serif SC',serif;font-size:18px;margin-bottom:6px}
.legacy-technology .wizard-header p{font-size:13px;color:rgba(255,255,255,.7);line-height:1.6}
.legacy-technology .wizard-progress{display:flex;align-items:center;gap:8px;margin-top:16px}
.legacy-technology .wp-step{display:flex;align-items:center;gap:6px;font-size:11px}
.legacy-technology .wp-dot{width:28px;height:28px;border-radius:50%;background:rgba(255,255,255,.15);border:2px solid rgba(255,255,255,.2);display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:rgba(255,255,255,.5);transition:.3s;flex-shrink:0}
.legacy-technology .wp-dot.done{background:rgba(110,231,168,.3);border-color:#6ee7a8;color:#6ee7a8}
.legacy-technology .wp-dot.current{background:rgba(255,255,255,.2);border-color:#fff;color:#fff}
.legacy-technology .wp-line{flex:1;height:2px;background:rgba(255,255,255,.15);border-radius:1px;transition:.3s}
.legacy-technology .wp-line.done{background:#6ee7a8}
.legacy-technology .wp-label{font-size:10px;color:rgba(255,255,255,.5);margin-top:3px;text-align:center}

.legacy-technology .wizard-body{padding:28px}
.legacy-technology .wiz-q{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px;line-height:1.5}
.legacy-technology .wiz-hint{font-size:13px;color:var(--gray);margin-bottom:22px;line-height:1.6}
.legacy-technology .wiz-options{display:flex;flex-direction:column;gap:8px}
.legacy-technology .wiz-opt{display:flex;align-items:flex-start;gap:14px;padding:16px 18px;border:1.5px solid var(--line);border-radius:12px;cursor:pointer;transition:.2s;background:#fff}
.legacy-technology .wiz-opt:hover{border-color:var(--g);background:var(--gl)}
.legacy-technology .wiz-opt.selected{border-color:var(--g);background:var(--gl)}
.legacy-technology .wo-icon{width:36px;height:36px;border-radius:8px;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:18px;flex-shrink:0;margin-top:1px;transition:.15s}
.legacy-technology .wiz-opt.selected .wo-icon,.legacy-technology .wiz-opt:hover .wo-icon{background:rgba(26,124,79,.12)}
.legacy-technology .wo-main{font-size:14px;font-weight:600;color:var(--ink);margin-bottom:2px}
.legacy-technology .wo-sub{font-size:12px;color:var(--gray);line-height:1.5}
.legacy-technology .wo-radio{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);margin-left:auto;margin-top:3px;flex-shrink:0;display:flex;align-items:center;justify-content:center;transition:.2s}
.legacy-technology .wiz-opt.selected .wo-radio{border-color:var(--g);background:var(--g)}
.legacy-technology .wo-check{width:8px;height:8px;border-radius:50%;background:#fff}

.legacy-technology .wiz-nav{display:flex;justify-content:space-between;align-items:center;margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
.legacy-technology .wiz-back{background:none;border:1.5px solid var(--line);color:var(--gray);padding:9px 20px;border-radius:8px;font-size:13px;cursor:pointer;font-family:'Noto Sans SC',sans-serif;transition:.15s}
.legacy-technology .wiz-back:hover{border-color:var(--ink2);color:var(--ink)}
.legacy-technology .wiz-next{background:var(--g);color:#fff;border:none;padding:10px 28px;border-radius:8px;font-size:14px;font-weight:700;cursor:pointer;font-family:'Noto Serif SC',serif;transition:.15s;display:flex;align-items:center;gap:8px}
.legacy-technology .wiz-next:hover{background:var(--g2)}
.legacy-technology .wiz-next:disabled{background:var(--gray2);cursor:not-allowed}

/* Wizard 结果面板 */
.legacy-technology .wiz-result{padding:28px;display:none}
.legacy-technology .wiz-result.show{display:block}
.legacy-technology .wr-header{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px;padding:20px;border-radius:14px}
.legacy-technology .wr-icon{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:28px;flex-shrink:0}
.legacy-technology .wr-rec-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;margin-bottom:4px;opacity:.7}
.legacy-technology .wr-tech-name{font-family:'Noto Serif SC',serif;font-size:22px;font-weight:700;margin-bottom:4px}
.legacy-technology .wr-tagline{font-size:13px;opacity:.8;line-height:1.5}
.legacy-technology .wr-details{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}
.legacy-technology .wr-detail{background:var(--bg);border-radius:8px;padding:12px 14px}
.legacy-technology .wrd-label{font-size:11px;color:var(--gray);margin-bottom:3px}
.legacy-technology .wrd-val{font-size:13px;font-weight:600;color:var(--ink2)}
.legacy-technology .wr-reason{background:var(--gl);border-left:3px solid var(--g);border-radius:0 8px 8px 0;padding:14px 16px;font-size:13px;color:var(--g2);line-height:1.7;margin-bottom:16px}
.legacy-technology .wr-actions{display:flex;gap:10px;flex-wrap:wrap}
.legacy-technology .btn-wr-primary{background:var(--g);color:#fff;padding:11px 24px;border-radius:8px;font-size:13px;font-weight:700;display:inline-block;transition:.15s}
.legacy-technology .btn-wr-primary:hover{background:var(--g2)}
.legacy-technology .btn-wr-sec{border:1.5px solid var(--g);color:var(--g);padding:10px 18px;border-radius:8px;font-size:13px;display:inline-block;transition:.15s;background:none;cursor:pointer;font-family:'Noto Sans SC',sans-serif}
.legacy-technology .btn-wr-sec:hover{background:var(--gl)}

/* ===== 三个关键参数卡片 ===== */
.legacy-technology .factors-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}
.legacy-technology .factor-card{background:#fff;border:1.5px solid var(--line);border-radius:16px;padding:24px 22px;position:relative;overflow:hidden;transition:.2s}
.legacy-technology .factor-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:3px 3px 0 0}
.legacy-technology .factor-card.fc-wind::before{background:linear-gradient(90deg,#1a7c4f,#2ea06a)}
.legacy-technology .factor-card.fc-conc::before{background:linear-gradient(90deg,#d97706,#f59e0b)}
.legacy-technology .factor-card.fc-comp::before{background:linear-gradient(90deg,#1a5c8f,#3b82f6)}
.legacy-technology .factor-num{width:32px;height:32px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-family:'Noto Serif SC',serif;font-size:15px;font-weight:700;color:#fff;margin-bottom:14px}
.legacy-technology .fc-wind .factor-num{background:var(--g)}
.legacy-technology .fc-conc .factor-num{background:var(--amber2)}
.legacy-technology .fc-comp .factor-num{background:var(--blue)}
.legacy-technology .factor-title{font-family:'Noto Serif SC',serif;font-size:16px;font-weight:700;margin-bottom:6px}
.legacy-technology .factor-desc{font-size:13px;color:var(--gray);line-height:1.7;margin-bottom:14px}
.legacy-technology .factor-how{background:var(--bg);border-radius:8px;padding:10px 12px;font-size:12px;color:var(--ink2);line-height:1.6}
.legacy-technology .factor-how strong{color:var(--g)}
.legacy-technology .factor-example{display:flex;flex-wrap:wrap;gap:5px;margin-top:10px}
.legacy-technology .fex-chip{background:var(--gl);color:var(--g2);border-radius:100px;padding:3px 10px;font-size:11px;font-weight:500}
.legacy-technology .fc-conc .fex-chip{background:var(--amber-l);color:var(--amber)}
.legacy-technology .fc-comp .fex-chip{background:var(--blue-l);color:var(--blue)}

/* ===== 技术方案卡片 ===== */
.legacy-technology .tech-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:28px}
.legacy-technology .tech-card{background:#fff;border:2px solid var(--line);border-radius:18px;padding:26px 24px;transition:.25s cubic-bezier(.2,.8,.3,1);cursor:pointer;position:relative;overflow:hidden}
.legacy-technology .tech-card::after{content:'';position:absolute;inset:0;background:var(--tc-bg);opacity:0;transition:.2s;pointer-events:none}
.legacy-technology .tech-card:hover{border-color:var(--tc-color);transform:translateY(-3px);box-shadow:0 12px 36px rgba(0,0,0,.08)}
.legacy-technology .tech-card:hover::after{opacity:1}
.legacy-technology .tc-head{display:flex;align-items:flex-start;gap:14px;margin-bottom:18px;position:relative;z-index:1}
.legacy-technology .tc-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;flex-shrink:0;background:var(--tc-bg)}
.legacy-technology .tc-name{font-family:'Noto Serif SC',serif;font-size:20px;font-weight:700;margin-bottom:4px;color:var(--ink)}
.legacy-technology .tech-card:hover .tc-name{color:var(--tc-color)}
.legacy-technology .tc-abbr{display:inline-block;background:var(--tc-bg);color:var(--tc-color);border-radius:6px;padding:2px 8px;font-size:11px;font-weight:700;border:1px solid var(--tc-color);opacity:.7}
.legacy-technology .tc-tagline{font-size:13px;color:var(--gray);line-height:1.6;margin-bottom:16px;position:relative;z-index:1}
.legacy-technology .tc-specs{display:flex;flex-direction:column;gap:7px;margin-bottom:18px;position:relative;z-index:1}
.legacy-technology .tc-spec{display:flex;gap:8px;font-size:12px}
.legacy-technology .tc-spec-label{color:var(--gray2);width:76px;flex-shrink:0}
.legacy-technology .tc-spec-val{color:var(--ink2);font-weight:500;flex:1}
.legacy-technology .tc-best{background:var(--tc-bg);border-radius:8px;padding:10px 12px;font-size:12px;color:var(--tc-color);font-weight:600;position:relative;z-index:1;border:1px solid var(--tc-color);opacity:.8}
.legacy-technology .tc-best::before{content:'✓ 最适合：';opacity:.7;margin-right:4px}
.legacy-technology .tech-card:hover .tc-best{opacity:1}
/* 技术卡片颜色主题 */
.legacy-technology .tc-rto{--tc-color:var(--g);--tc-bg:var(--gl)}
.legacy-technology .tc-zeolite{--tc-color:var(--amber2);--tc-bg:var(--amber-l)}
.legacy-technology .tc-rco{--tc-color:var(--blue);--tc-bg:var(--blue-l)}
.legacy-technology .tc-rotary{--tc-color:var(--purple);--tc-bg:var(--purple-l)}

/* ===== 横向对比表格 ===== */
.legacy-technology .compare-wrap{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-bottom:28px}
.legacy-technology .compare-table{width:100%;border-collapse:collapse;font-size:13px}
.legacy-technology .compare-table th{padding:14px 16px;text-align:left;font-weight:700;font-size:12px;border-bottom:2px solid var(--line)}
.legacy-technology .compare-table th:first-child{background:var(--bg);color:var(--gray);width:160px}
.legacy-technology .compare-table th.th-rto{background:#e8f5ee;color:var(--g2)}
.legacy-technology .compare-table th.th-zeolite{background:#fef3c7;color:#92400e}
.legacy-technology .compare-table th.th-rco{background:#e6f1fb;color:var(--blue)}
.legacy-technology .compare-table th.th-rotary{background:#f5f3ff;color:var(--purple)}
.legacy-technology .compare-table td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink2);line-height:1.55}
.legacy-technology .compare-table td:first-child{background:var(--bg);font-weight:600;font-size:12px;color:var(--gray);white-space:nowrap}
.legacy-technology .compare-table tr:last-child td{border-bottom:none}
.legacy-technology .tag-good{display:inline-block;background:#dcfce7;color:#166534;border-radius:5px;padding:2px 7px;font-size:11px;font-weight:700}
.legacy-technology .tag-ok{display:inline-block;background:#fef9c3;color:#854d0e;border-radius:5px;padding:2px 7px;font-size:11px;font-weight:700}
.legacy-technology .tag-bad{display:inline-block;background:#fee2e2;color:#991b1b;border-radius:5px;padding:2px 7px;font-size:11px;font-weight:700}
.legacy-technology .tag-na{display:inline-block;background:var(--bg);color:var(--gray2);border-radius:5px;padding:2px 7px;font-size:11px}

/* ===== 决策流程图 ===== */
.legacy-technology .flowchart{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;margin-bottom:28px}
.legacy-technology .flowchart h4{font-family:'Noto Serif SC',serif;font-size:16px;font-weight:700;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.legacy-technology .flow-tree{display:flex;flex-direction:column;gap:0}
.legacy-technology .flow-node{position:relative;padding-left:32px}
.legacy-technology .flow-node::before{content:'';position:absolute;left:11px;top:28px;bottom:-1px;width:2px;background:var(--line)}
.legacy-technology .flow-node:last-child::before{display:none}
.legacy-technology .flow-q{display:flex;align-items:flex-start;gap:12px;padding:12px 0}
.legacy-technology .fq-diamond{width:22px;height:22px;background:var(--g);border-radius:4px;transform:rotate(45deg);flex-shrink:0;margin-top:2px;display:flex;align-items:center;justify-content:center;position:relative;z-index:1}
.legacy-technology .fq-text{font-size:14px;font-weight:600;color:var(--ink);line-height:1.5;padding-top:2px}
.legacy-technology .flow-branches{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:0 0 14px 20px}
.legacy-technology .flow-branch{padding:10px 14px;border-radius:10px;border:1.5px solid var(--line);font-size:13px}
.legacy-technology .flow-branch .fb-cond{font-size:11px;font-weight:700;margin-bottom:4px;text-transform:uppercase;letter-spacing:.05em}
.legacy-technology .flow-branch .fb-result{font-weight:700;font-size:14px;margin-bottom:2px}
.legacy-technology .flow-branch .fb-note{font-size:12px;color:var(--gray);line-height:1.4}
.legacy-technology .fb-yes{border-color:var(--gb);background:var(--gl)}
.legacy-technology .fb-yes .fb-cond{color:var(--g)}
.legacy-technology .fb-yes .fb-result{color:var(--g2)}
.legacy-technology .fb-no{border-color:var(--line);background:var(--bg)}
.legacy-technology .fb-no .fb-cond{color:var(--gray)}
.legacy-technology .fb-no .fb-result{color:var(--ink2)}

/* ===== 真实案例 ===== */
.legacy-technology .cases-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:28px}
.legacy-technology .case-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:.15s}
.legacy-technology .case-card:hover{border-color:var(--gb);box-shadow:0 4px 20px rgba(26,124,79,.07)}
.legacy-technology .case-head{padding:18px 20px 14px;border-bottom:1px solid var(--line)}
.legacy-technology .case-industry{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.legacy-technology .ci-icon{font-size:18px}
.legacy-technology .ci-label{font-size:11px;font-weight:700;color:var(--gray);text-transform:uppercase;letter-spacing:.06em}
.legacy-technology .case-title{font-family:'Noto Serif SC',serif;font-size:15px;font-weight:700;line-height:1.4;color:var(--ink)}
.legacy-technology .case-body{padding:14px 20px}
.legacy-technology .case-params{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:12px}
.legacy-technology .cp-item{background:var(--bg);border-radius:6px;padding:7px 10px}
.legacy-technology .cp-label{font-size:10px;color:var(--gray2);margin-bottom:1px}
.legacy-technology .cp-val{font-size:12px;font-weight:700;color:var(--ink2)}
.legacy-technology .case-solution{display:flex;align-items:center;gap:8px;padding:10px 12px;background:var(--gl);border-radius:8px;margin-bottom:10px}
.legacy-technology .cs-badge{background:var(--g);color:#fff;border-radius:5px;padding:2px 8px;font-size:11px;font-weight:700;white-space:nowrap}
.legacy-technology .cs-text{font-size:12px;color:var(--g2);line-height:1.4}
.legacy-technology .case-result{font-size:12px;color:var(--gray);line-height:1.6}
.legacy-technology .case-result strong{color:var(--g);font-size:13px}

/* ===== 常见误区 ===== */
.legacy-technology .mistakes-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:24px}
.legacy-technology .mistake-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;position:relative;overflow:hidden}
.legacy-technology .mistake-card::before{content:'';position:absolute;top:0;left:0;bottom:0;width:3px;background:var(--red)}
.legacy-technology .mc-num{display:inline-flex;width:24px;height:24px;border-radius:6px;background:#fee2e2;color:var(--red);font-size:11px;font-weight:700;align-items:center;justify-content:center;margin-bottom:10px}
.legacy-technology .mc-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:6px;line-height:1.4}
.legacy-technology .mc-desc{font-size:12px;color:var(--gray);line-height:1.7}
.legacy-technology .mc-fix{margin-top:10px;padding:8px 10px;background:var(--gl);border-radius:7px;font-size:12px;color:var(--g2);line-height:1.6}
.legacy-technology .mc-fix::before{content:'✓ 正确做法：';font-weight:700;display:block;margin-bottom:2px}

/* ===== 自查清单 ===== */
.legacy-technology .checklist{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:24px}
.legacy-technology .cl-header{background:var(--g);color:#fff;padding:16px 22px;display:flex;align-items:center;gap:12px}
.legacy-technology .cl-header h4{font-family:'Noto Serif SC',serif;font-size:15px}
.legacy-technology .cl-body{padding:20px 22px}
.legacy-technology .cl-group{margin-bottom:18px}
.legacy-technology .cl-group:last-child{margin-bottom:0}
.legacy-technology .cl-group-title{font-size:12px;font-weight:700;color:var(--gray);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;display:flex;align-items:center;gap:6px}
.legacy-technology .cl-items{display:flex;flex-direction:column;gap:6px}
.legacy-technology .cl-item{display:flex;align-items:flex-start;gap:10px;font-size:13px;color:var(--ink2);line-height:1.5}
.legacy-technology .cl-box{width:18px;height:18px;border:2px solid var(--line);border-radius:4px;flex-shrink:0;margin-top:1px;cursor:pointer;transition:.15s;display:flex;align-items:center;justify-content:center;background:#fff}
.legacy-technology .cl-box:hover{border-color:var(--g)}
.legacy-technology .cl-box.checked{background:var(--g);border-color:var(--g)}
.legacy-technology .cl-check{color:#fff;font-size:11px;display:none}
.legacy-technology .cl-box.checked .cl-check{display:block}
.legacy-technology .cl-progress-bar{height:4px;background:var(--line);border-radius:2px;margin-top:14px;overflow:hidden}
.legacy-technology .cl-progress-fill{height:100%;background:var(--g);border-radius:2px;transition:.3s;width:0%}

/* ===== 侧边栏 ===== */
.legacy-technology .sidebar{position:relative;top:0}
.legacy-technology .sidebar.is-sticky{position:sticky}
.legacy-technology .sidebar::-webkit-scrollbar{width:4px}
.legacy-technology .sidebar::-webkit-scrollbar-track{background:var(--bg)}
.legacy-technology .sidebar::-webkit-scrollbar-thumb{background:var(--line);border-radius:2px}
.legacy-technology .sidebar::-webkit-scrollbar-thumb:hover{background:var(--gray)}
.legacy-technology .sb-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:14px}
.legacy-technology .sb-card h4{font-family:'Noto Serif SC',serif;font-size:14px;font-weight:700;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:8px}
.legacy-technology .sb-toc{display:flex;flex-direction:column;gap:1px}
.legacy-technology .sb-toc-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:7px;font-size:12px;color:var(--gray);cursor:pointer;transition:.15s;line-height:1.4;background:none;border:none;text-align:left;width:100%;font-family:'Noto Sans SC',sans-serif}
.legacy-technology .sb-toc-item:hover{background:var(--gl);color:var(--g)}
.legacy-technology .sb-toc-item.active{background:var(--gl);color:var(--g);font-weight:600}
.legacy-technology .sb-toc-dot{width:6px;height:6px;border-radius:50%;background:var(--line);flex-shrink:0;transition:.15s}
.legacy-technology .sb-toc-item.active .sb-toc-dot,.legacy-technology .sb-toc-item:hover .sb-toc-dot{background:var(--g)}
.legacy-technology .qa-items{display:flex;flex-direction:column;gap:8px}
.legacy-technology .qa-item{background:var(--bg);border-radius:9px;padding:11px 13px;font-size:12px;line-height:1.55}
.legacy-technology .qa-q{font-weight:700;color:var(--ink2);margin-bottom:3px;display:flex;align-items:flex-start;gap:6px}
.legacy-technology .qa-a{color:var(--gray);padding-left:16px}
.legacy-technology .qa-q::before{content:'Q';background:var(--g);color:#fff;border-radius:4px;padding:0 5px;font-size:10px;flex-shrink:0;margin-top:1px}
.legacy-technology .rel-links{display:flex;flex-direction:column;gap:6px}
.legacy-technology .rel-link{display:flex;align-items:center;gap:10px;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:12px;color:var(--ink2);transition:.15s}
.legacy-technology .rel-link:hover{border-color:var(--g);background:var(--gl);color:var(--g)}
.legacy-technology .rel-link-active{border-color:var(--gb)!important;background:var(--gl)!important}
.legacy-technology .rl-icon{font-size:16px;flex-shrink:0}
.legacy-technology .rl-text{flex:1;line-height:1.4;font-weight:500}
.legacy-technology .rl-arr{color:var(--gray2);transition:.15s}
.legacy-technology .rel-link:hover .rl-arr{transform:translateX(3px);color:var(--g)}
.legacy-technology .cat-faq-list{display:flex;flex-direction:column;gap:2px}
.legacy-technology .cat-faq-item{display:flex;align-items:flex-start;gap:8px;padding:9px 10px;border-radius:8px;font-size:12px;color:var(--ink2);line-height:1.5;transition:.15s;text-decoration:none;border:1px solid transparent}
.legacy-technology .cat-faq-item:hover{background:var(--gl);border-color:var(--gb);color:var(--g2)}
.legacy-technology .cfq-num{width:18px;height:18px;border-radius:50%;background:var(--bg);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;color:var(--gray2);flex-shrink:0;margin-top:1px;transition:.15s}
.legacy-technology .cat-faq-item:hover .cfq-num{background:var(--g);border-color:var(--g);color:#fff}
.legacy-technology .cfq-text{flex:1;line-height:1.5}
.legacy-technology .cfq-arr{color:var(--gray2);font-size:13px;flex-shrink:0;margin-top:1px;opacity:0;transition:.15s}
.legacy-technology .cat-faq-item:hover .cfq-arr{opacity:1;color:var(--g);transform:translateX(2px)}
.legacy-technology .contact-box{background:linear-gradient(135deg,#0f3d22,#1a5c38);border-radius:12px;padding:20px;color:#fff}
.legacy-technology .contact-box h4{font-family:'Noto Serif SC',serif;font-size:14px;margin-bottom:6px;border:none!important;padding:0!important}
.legacy-technology .contact-box p{font-size:12px;color:rgba(255,255,255,.7);line-height:1.6;margin-bottom:14px}
.legacy-technology .contact-item{margin-bottom:8px}
.legacy-technology .ci-lbl{font-size:10px;color:rgba(255,255,255,.5);margin-bottom:1px}
.legacy-technology .ci-v{font-size:13px;font-weight:600;color:#fff}
.legacy-technology .ci-v a{color:#6ee7a8}
.legacy-technology .btn-cb{display:block;text-align:center;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);color:#fff;border-radius:7px;padding:9px;font-size:12px;font-weight:700;margin-top:14px;transition:.15s}
.legacy-technology .btn-cb:hover{background:rgba(255,255,255,.22)}

/* ===== 响应式（本页） ===== */
@media(max-width:1100px){.legacy-technology .main-wrap{grid-template-columns:1fr}
  .legacy-technology .sidebar{position:static;display:grid;grid-template-columns:1fr 1fr;gap:14px}
}
@media(max-width:760px){.legacy-technology .main-wrap{padding:28px 20px}
  .legacy-technology .toc-bar{padding:0 20px}
  .legacy-technology .factors-grid{grid-template-columns:1fr}
  .legacy-technology .tech-cards{grid-template-columns:1fr}
  .legacy-technology .cases-grid{grid-template-columns:1fr}
  .legacy-technology .mistakes-grid{grid-template-columns:1fr}
  .legacy-technology .sidebar{grid-template-columns:1fr}
  .legacy-technology .wr-details{grid-template-columns:1fr 1fr}
  .legacy-technology .flow-branches{grid-template-columns:1fr}
}

/* ===== 浓度区间图表（faq-technology02.html 专用） ===== */
.legacy-technology .conc-scale-wrap{background:#fff;border:1.5px solid var(--line);border-radius:20px;padding:32px 28px;margin-bottom:30px;box-shadow:0 4px 24px rgba(0,0,0,.03)}
.legacy-technology .scale-track{height:16px;border-radius:100px;background:linear-gradient(90deg, #60a5fa 0%, #34d399 25%, #10b981 45%, #fbbf24 75%, #ef4444 100%);position:relative;margin:20px 0 40px}
.legacy-technology .scale-marker{position:absolute;top:24px;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:4px;width:80px}
.legacy-technology .sm-line{width:2px;height:8px;background:var(--line)}
.legacy-technology .sm-val{font-size:12px;font-weight:700;color:var(--ink2)}
.legacy-technology .sm-label{font-size:11px;color:var(--gray);white-space:nowrap}
.legacy-technology .scale-zone{position:absolute;top:-36px;transform:translateX(-50%);background:#fff;border:1px solid var(--line);border-radius:6px;padding:4px 10px;font-size:11px;font-weight:700;white-space:nowrap;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.legacy-technology .scale-zone::after{content:'';position:absolute;bottom:-5px;left:50%;transform:translateX(-50%);border-width:5px 5px 0;border-style:solid;border-color:var(--line) transparent transparent transparent}
.legacy-technology .zone-low{left:10%;color:var(--blue);border-color:var(--blue)}
.legacy-technology .zone-low::after{border-top-color:var(--blue)}
.legacy-technology .zone-ideal{left:35%;color:var(--g);border-color:var(--g);background:var(--gl)}
.legacy-technology .zone-ideal::after{border-top-color:var(--g)}
.legacy-technology .zone-high{left:85%;color:var(--red);border-color:var(--red)}
.legacy-technology .zone-high::after{border-top-color:var(--red)}

/* ===== 浓度卡片网格 ===== */
.legacy-technology .info-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:24px}
.legacy-technology .ig-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;position:relative;overflow:hidden}
.legacy-technology .ig-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px}
.legacy-technology .ig-card.bg-blue::before{background:var(--blue)}
.legacy-technology .ig-card.bg-green::before{background:var(--g)}
.legacy-technology .ig-card.bg-red::before{background:var(--red)}
.legacy-technology .ig-card.bg-orange::before{background:var(--amber2)}
.legacy-technology .ig-title{font-family:'Noto Serif SC',serif;font-size:18px;font-weight:700;margin-bottom:8px;color:var(--ink)}
.legacy-technology .ig-desc{font-size:13px;color:var(--gray);line-height:1.7;margin-bottom:16px}
.legacy-technology .ig-list{list-style:none;display:flex;flex-direction:column;gap:8px}
.legacy-technology .ig-list li{font-size:13px;color:var(--ink2);display:flex;align-items:flex-start;gap:8px;line-height:1.5}
.legacy-technology .ig-list li::before{content:'•';color:var(--gray);font-weight:bold}

/* ===== 成本对比盒子 ===== */
.legacy-technology .cost-box{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;align-items:center;gap:24px;margin-bottom:16px}
.legacy-technology .cb-left{flex:1}
.legacy-technology .cb-title{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:6px}
.legacy-technology .cb-desc{font-size:13px;color:var(--gray);line-height:1.6}
.legacy-technology .cb-right{text-align:right;flex-shrink:0}
.legacy-technology .cb-cost{font-family:'Noto Serif SC',serif;font-size:22px;font-weight:700;color:var(--red);margin-bottom:2px}
.legacy-technology .cb-cost.green{color:var(--g)}
.legacy-technology .cb-unit{font-size:11px;color:var(--gray)}

/* ===== 工艺流程图 ===== */
.legacy-technology .process-box{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:16px}
.legacy-technology .pb-step{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px}
.legacy-technology .pb-step:last-child{margin-bottom:0}
.legacy-technology .pb-num{width:28px;height:28px;background:var(--g);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px;flex-shrink:0;margin-top:2px}
.legacy-technology .pb-content{flex:1}
.legacy-technology .pb-title{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:4px}
.legacy-technology .pb-desc{font-size:13px;color:var(--gray);line-height:1.6}

/* ===== 对比表格 ===== */
.legacy-technology .vs-table{width:100%;border-collapse:collapse;font-size:13px;background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;margin-bottom:24px}
.legacy-technology .vs-table th{padding:14px 16px;text-align:left;font-weight:700;font-size:12px;background:var(--bg);border-bottom:2px solid var(--line)}
.legacy-technology .vs-table td{padding:12px 16px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--ink2);line-height:1.55}
.legacy-technology .vs-table tr:last-child td{border-bottom:none}
.legacy-technology .good-tag{display:inline-block;background:#dcfce7;color:#166534;border-radius:5px;padding:2px 7px;font-size:11px;font-weight:700}
.legacy-technology .warn-tag{display:inline-block;background:#fef9c3;color:#854d0e;border-radius:5px;padding:2px 7px;font-size:11px;font-weight:700}

/* ===== 信息卡片颜色主题 ===== */
.legacy-technology .ig-card.bg-slate::before{background:var(--slate)}
.legacy-technology .ig-card.bg-purple::before{background:var(--purple)}

/* ===== 英雄卡片（统计数据） ===== */
.legacy-technology .hc-title{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.legacy-technology .hc-stat-box{background:rgba(0,0,0,.2);border-radius:12px;padding:16px;margin-bottom:12px;border:1px solid rgba(255,255,255,.05)}
.legacy-technology .hc-stat-label{font-size:11px;color:rgba(255,255,255,.5);margin-bottom:4px;text-transform:uppercase}
.legacy-technology .hc-stat-val{font-family:'Noto Serif SC',serif;font-size:24px;font-weight:700;color:#6ee7a8;line-height:1}
.legacy-technology .hc-stat-val small{font-size:12px;font-family:'Noto Sans SC',sans-serif;font-weight:400;color:rgba(255,255,255,.6)}
.legacy-technology .hc-stat-val.red{color:#f87171}

/* ===== 数学公式盒子 ===== */
.legacy-technology .math-box{background:var(--bg);border:1.5px solid var(--g);border-radius:16px;padding:28px;margin-bottom:24px;position:relative}
.legacy-technology .math-box::before{content:'省钱核心';position:absolute;top:-12px;left:24px;background:var(--g);color:#fff;font-size:12px;font-weight:700;padding:2px 10px;border-radius:100px;letter-spacing:1px}
.legacy-technology .mb-equation{font-family:'Noto Serif SC',serif;font-size:20px;font-weight:700;color:var(--ink);text-align:center;margin-bottom:20px;padding:16px;background:#fff;border-radius:8px;border:1px solid var(--line)}
.legacy-technology .mb-equation span{color:var(--g)}
.legacy-technology .mb-explain{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.legacy-technology .mb-col h5{font-size:14px;font-weight:700;margin-bottom:8px;color:var(--ink2)}
.legacy-technology .mb-col p{font-size:13px;color:var(--gray);line-height:1.6}

/* ===== 信息卡片颜色主题扩展 ===== */
.legacy-technology .ig-card.bg-amber::before{background:var(--amber2)}

/* ===== 响应式调整 ===== */
@media(max-width:760px){.legacy-technology .mb-explain{grid-template-columns:1fr}
}

/* ===== 成本冰山模型 ===== */
.legacy-technology .iceberg-box{background:#fff;border:1.5px solid var(--g);border-radius:16px;padding:28px;margin-bottom:24px;text-align:center;box-shadow:0 8px 30px rgba(26,124,79,.06)}
.legacy-technology .ib-top{padding-bottom:20px;border-bottom:2px dashed var(--line);position:relative}
.legacy-technology .ib-top::after{content:'海平面 (买设备时的关注点)';position:absolute;bottom:-10px;left:50%;transform:translateX(-50%);background:#fff;padding:0 12px;font-size:12px;color:var(--gray);font-weight:600}
.legacy-technology .ib-bottom{padding-top:30px}
.legacy-technology .ib-tag{display:inline-block;background:var(--gl);color:var(--g);padding:6px 14px;border-radius:8px;font-size:14px;font-weight:700;margin:6px}
.legacy-technology .ib-tag.hidden{background:#fee2e2;color:#991b1b}
.legacy-technology .ib-title{font-family:'Noto Serif SC',serif;font-size:20px;font-weight:700;margin-bottom:12px;color:var(--ink)}

/* ===== 信息卡片图标 ===== */
.legacy-technology .ig-icon{font-size:28px;margin-bottom:12px}

/* ===== 成本盒子扩展样式 ===== */
.legacy-technology .cost-box{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;align-items:center;gap:24px;margin-bottom:16px}
.legacy-technology .cost-box:nth-child(2){border-color:var(--teal);background:var(--teal-l)}
.legacy-technology .cb-left{flex:1}
.legacy-technology .cb-title{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:6px}
.legacy-technology .cb-desc{font-size:13px;color:var(--gray);line-height:1.6}
.legacy-technology .cb-right{text-align:right;flex-shrink:0}
.legacy-technology .cb-cost{font-family:'Noto Serif SC',serif;font-size:22px;font-weight:700;color:var(--red);margin-bottom:2px}
.legacy-technology .cb-cost.green{color:var(--g)}
.legacy-technology .cb-cost.teal{color:var(--g)}
.legacy-technology .cb-unit{font-size:11px;color:var(--gray)}

/* ===== 响应式调整扩展 ===== */
@media(max-width:760px){.legacy-technology .cost-box{flex-direction:column;align-items:flex-start;gap:12px}
  .legacy-technology .cb-right{text-align:left}
  .legacy-technology .saving-box{flex-direction:column;align-items:flex-start;gap:12px}
  .legacy-technology .sb-right{text-align:left}
}

/* ===== 警示/危险盒子 ===== */
.legacy-technology .danger-box{background:var(--gl);border:1.5px solid var(--g);border-radius:16px;padding:28px;margin-bottom:24px;position:relative}
.legacy-technology .db-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.legacy-technology .db-icon{width:42px;height:42px;background:var(--g);color:#fff;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:bold}
.legacy-technology .db-title{font-family:'Noto Serif SC',serif;font-size:18px;font-weight:700;color:var(--g2)}
.legacy-technology .db-content p{font-size:14px;color:var(--g2);line-height:1.6;margin-bottom:12px}
.legacy-technology .db-content p:last-child{margin-bottom:0}

/* ===== 信息卡片背景色扩展 ===== */
.legacy-technology .ig-card.bg-safety::before{background:var(--g)}
.legacy-technology .ig-card.bg-slate::before{background:var(--g)}
.legacy-technology .ig-card.bg-blue::before{background:var(--blue2)}
.legacy-technology .ig-card.bg-green::before{background:var(--g)}

/* ===== 维护清单盒子 ===== */
.legacy-technology .checklist-box{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:24px;margin-bottom:16px}
.legacy-technology .cl-step{display:flex;align-items:flex-start;gap:16px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px dashed var(--line)}
.legacy-technology .cl-step:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}
.legacy-technology .checklist-box .cl-check{width:24px;height:24px;background:var(--gl);color:var(--g);border:1px solid var(--g);border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:12px;flex-shrink:0;margin-top:2px}
.legacy-technology .cl-content{flex:1}
.legacy-technology .cl-title{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:4px}
.legacy-technology .cl-freq{display:inline-block;padding:2px 8px;background:var(--gl);color:var(--g2);border-radius:4px;font-size:11px;font-weight:600;margin-bottom:6px}
.legacy-technology .cl-desc{font-size:13px;color:var(--gray);line-height:1.6}

/* ===== 警告提示框 ===== */
.legacy-technology .warn-box{background:var(--red-l);border-left:3px solid var(--red);border-radius:0 8px 8px 0;padding:16px;font-size:13px;color:#991b1b;line-height:1.7;margin:20px 0}

/* ===== 表格高亮值 ===== */
.legacy-technology .val-highlight{font-family:'Noto Serif SC',serif;font-weight:700;color:var(--g);font-size:16px}

/* ===== 信息卡片背景色扩展 ===== */
.legacy-technology .ig-card.bg-green::before{background:var(--g)}
.legacy-technology .ig-card.bg-eco::before{background:var(--g)}
.legacy-technology .ig-card.bg-cyan::before{background:var(--g)}

/* ===== 节省成本盒子 ===== */
.legacy-technology .saving-box{background:#fff;border:1.5px solid var(--g);border-radius:12px;padding:20px;display:flex;align-items:center;gap:24px;margin-bottom:16px;box-shadow:0 4px 16px rgba(26,124,79,.08)}
.legacy-technology .sb-left{flex:1}
.legacy-technology .sb-title{font-weight:700;font-size:15px;color:var(--ink);margin-bottom:6px}
.legacy-technology .sb-desc{font-size:13px;color:var(--gray);line-height:1.6}
.legacy-technology .sb-right{text-align:right;flex-shrink:0}
.legacy-technology .sb-cost{font-family:'Noto Serif SC',serif;font-size:22px;font-weight:700;color:var(--g);margin-bottom:2px}
.legacy-technology .sb-unit{font-size:11px;color:var(--gray)}

/* ===== 文档清单盒子 ===== */
.legacy-technology .doc-box{background:#fff;border:1.5px solid var(--gb);border-radius:16px;padding:24px;margin-bottom:20px;box-shadow:0 4px 12px rgba(26,124,79,.05)}
.legacy-technology .doc-header{font-family:'Noto Serif SC',serif;font-size:16px;font-weight:700;color:var(--g2);margin-bottom:16px;display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--gb);padding-bottom:12px}
.legacy-technology .doc-item{display:flex;align-items:flex-start;gap:12px;font-size:14px;color:var(--ink2);margin-bottom:12px}
.legacy-technology .doc-item:last-child{margin-bottom:0}
.legacy-technology .doc-item-icon{color:var(--g);font-size:18px;margin-top:-2px;flex-shrink:0}

/* ===== FAQ 导航链接 ===== */
.legacy-technology .faq-nav-links{display:flex;flex-direction:column;gap:4px}
.legacy-technology .fnl-item{display:flex;align-items:flex-start;gap:9px;padding:9px 10px;border-radius:7px;font-size:12px;color:var(--gray);border:1px solid transparent;transition:.15s;line-height:1.4}
.legacy-technology .fnl-item:hover{background:var(--gl);color:var(--g);border-color:var(--gl)}
.legacy-technology .fnl-item.current{background:var(--gl);color:var(--g2);border-color:var(--gb);font-weight:600}
.legacy-technology .fnl-num{width:18px;height:18px;border-radius:50%;background:var(--bg);border:1px solid var(--line);font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:.15s;margin-top:1px}
.legacy-technology .fnl-item.current .fnl-num{background:var(--g);border-color:var(--g);color:#fff}

/* ===== Cost01 价格区间卡片 ===== */
.legacy-technology .price-range-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:28px}
.legacy-technology .price-card{background:#fff;border:2px solid var(--line);border-radius:18px;padding:24px 20px;transition:.2s;position:relative;overflow:hidden}
.legacy-technology .price-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;border-radius:4px 4px 0 0}
.legacy-technology .price-card.pc-small::before{background:linear-gradient(90deg,#1a7c4f,#2ea06a)}
.legacy-technology .price-card.pc-medium::before{background:linear-gradient(90deg,#0f5c38,#1a7c4f)}
.legacy-technology .price-card.pc-large::before{background:linear-gradient(90deg,#0a4a2d,#0f5c38)}
.legacy-technology .price-card:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(0,0,0,.08)}
.legacy-technology .pc-wind-label{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--gray2);margin-bottom:10px}
.legacy-technology .pc-range{font-family:'Noto Serif SC',serif;font-size:28px;font-weight:700;line-height:1.2;margin-bottom:6px}
.legacy-technology .pc-small .pc-range{color:#1a7c4f}
.legacy-technology .pc-medium .pc-range{color:#0f5c38}
.legacy-technology .pc-large .pc-range{color:#0a4a2d}
.legacy-technology .pc-unit{font-size:13px;color:var(--gray);margin-bottom:14px}
.legacy-technology .pc-specs{display:flex;flex-direction:column;gap:7px}
.legacy-technology .pc-spec{display:flex;gap:8px;font-size:12px}
.legacy-technology .pc-spec-label{color:var(--gray2);width:68px;flex-shrink:0}
.legacy-technology .pc-spec-val{color:var(--ink2);font-weight:500;flex:1}
.legacy-technology .pc-badge{display:inline-block;margin-top:12px;border-radius:6px;padding:3px 10px;font-size:11px;font-weight:700}
.legacy-technology .pc-small .pc-badge{background:var(--gl);color:var(--g2)}
.legacy-technology .pc-medium .pc-badge{background:var(--gl);color:var(--g2)}
.legacy-technology .pc-large .pc-badge{background:var(--gl);color:var(--g2)}

/* ===== Cost01 因素卡片 ===== */
.legacy-technology .factor-card.fc-mat::before{background:linear-gradient(90deg,#0f5c38,#1a7c4f)}
.legacy-technology .factor-card.fc-auto::before{background:linear-gradient(90deg,#0a4a2d,#0f5c38)}
.legacy-technology .fc-mat .factor-num{background:var(--g2)}
.legacy-technology .fc-auto .factor-num{background:var(--g3)}

/* ===== Cost01 成本明细 ===== */
.legacy-technology .cost-breakdown{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;margin-bottom:28px}
.legacy-technology .cb-header{background:var(--g);color:#fff;padding:16px 24px;display:flex;align-items:center;gap:12px}
.legacy-technology .cb-header h4{font-family:'Noto Serif SC',serif;font-size:16px}
.legacy-technology .cb-body{padding:0}
.legacy-technology .cb-row{display:grid;grid-template-columns:200px 1fr 120px;align-items:center;padding:14px 20px;border-bottom:1px solid var(--line);gap:16px;font-size:13px}
.legacy-technology .cb-row:last-child{border-bottom:none;background:var(--gl)}
.legacy-technology .cb-row:last-child .cb-item{font-weight:700;color:var(--g2)}
.legacy-technology .cb-row:last-child .cb-amount{font-weight:700;color:var(--g2);font-size:15px}
.legacy-technology .cb-row-header{background:var(--bg);color:var(--gray);font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.legacy-technology .cb-item{font-weight:600;color:var(--ink2)}
.legacy-technology .cb-desc{color:var(--gray);line-height:1.5}
.legacy-technology .cb-amount{font-weight:700;color:var(--ink2);text-align:right;white-space:nowrap}
.legacy-technology .cb-bar{height:4px;background:var(--gl);border-radius:2px;margin-top:6px}
.legacy-technology .cb-bar-fill{height:100%;background:var(--g);border-radius:2px}

/* ===== Cost01 检查清单组 ===== */
.legacy-technology .cl-group{border-bottom:1px solid var(--line)}
.legacy-technology .cl-group:last-of-type{border-bottom:none}
.legacy-technology .cl-group-title{padding:12px 20px 8px;font-size:11px;font-weight:700;color:var(--gray);text-transform:uppercase;letter-spacing:.06em;background:var(--bg)}
.legacy-technology .cl-items{padding:4px 0 10px}
.legacy-technology .cl-item{padding:8px 20px}

/* ===== Cost01 提示信息框 ===== */
.legacy-technology .tip-box{background:var(--gl);border-left:3px solid var(--g);border-radius:0 8px 8px 0;padding:13px 16px;font-size:13px;color:var(--g2);line-height:1.7;margin:16px 0}
.legacy-technology .info-box{background:var(--blue-l);border-left:3px solid var(--blue);border-radius:0 8px 8px 0;padding:13px 16px;font-size:13px;color:var(--blue);line-height:1.7;margin:16px 0}

/* ===== Cost01 响应式 ===== */
@media(max-width:1100px){.legacy-technology .price-range-grid{grid-template-columns:1fr}
}
@media(max-width:768px){.legacy-technology .cb-row{grid-template-columns:1fr;gap:8px}
  .legacy-technology .cb-amount{text-align:left}
}
.legacy-technology .toc-bar{position:relative;top:auto}
@media(max-width:760px){.legacy-technology{max-width:100%;overflow-x:hidden}.legacy-technology .main-wrap,.legacy-technology #mainContent,.legacy-technology .content-section{width:100%;min-width:0}.legacy-technology .compare-wrap,.legacy-technology .table-wrap{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}}