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0 20px #ef444480;font-size:52px;font-weight:700;animation:.5s infinite alternate pulse;position:absolute;top:0;left:0;right:0}.ch2-surge-solution{border:2px solid var(--accent);background:#00ffff0d;border-radius:8px;padding:30px}.ch2-surge-solution p{color:var(--text);font-size:24px;line-height:1.6}@keyframes surgeShake{0%{transform:translate(0)scale(1)}50%{transform:translate(-30px,15px)scale(1.1)}to{transform:translate(30px,-15px)scale(.9)}}@keyframes safeFlow{0%{transform:translate(-50px)}to{transform:translate(50px)}}@keyframes pulse{0%{opacity:.6}to{opacity:1;transform:scale(1.05)}}.ch3-scene{width:100%;height:100%;color:var(--text);font-family:var(--font-body);position:relative;overflow:hidden}.ch3-bg-dark{background-color:var(--surface)}.ch3-bg-image{z-index:0;background-position:50%;background-size:cover;width:100%;height:100%;position:absolute;top:0;left:0}.ch3-bg-overlay{z-index:1;background:linear-gradient(90deg,#000000f2 0%,#0009 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li{margin-bottom:24px;padding-left:30px;font-size:26px;line-height:1.6;transition:all .3s;position:relative}.ch3-step-list-large li:before{content:"►";color:var(--accent);position:absolute;left:0}.ch3-dim-bullet{opacity:.3}.ch3-active-bullet{opacity:1;color:var(--text);border-left:4px solid var(--accent);background:#00ffff0d;border-radius:4px;padding-left:20px}.ch3-dense-text-panel{background:var(--surface-2);border-radius:12px;padding:40px}.ch3-detail-box{border-top:1px dashed var(--rule);margin-top:30px;padding-top:20px}.ch3-detail-box p{color:var(--text-2);margin:0;font-size:22px;line-height:1.6}.ch3-detail-box .hero-num{background:#00ffff1a;border-radius:4px;margin-right:12px;padding:4px 12px;font-size:32px;display:inline-block}.ch3-leak-animation-large{background:#ef44440d;border:2px solid #ef4444;justify-content:space-between;align-items:center;width:1200px;padding:60px 80px;display:flex}.ch3-leak-box{text-align:center;border-radius:12px;flex:1;padding:40px}.ch3-air-box{background:#3b82f61a;border:2px solid #3b82f6}.ch3-gas-box{background:#ef44441a;border:2px solid #ef4444}.ch3-leak-box h3{color:var(--text);margin:0 0 10px;font-size:36px}.ch3-leak-box p{color:var(--text-2);margin-bottom:30px;font-size:20px}.ch3-pressure-num{font-size:56px;font-family:var(--font-mono);font-weight:700}.ch3-air-box .ch3-pressure-num{color:#3b82f6}.ch3-gas-box .ch3-pressure-num{color:#ef4444}.ch3-leak-gap-large{text-align:center;color:#ef4444;flex-direction:column;align-items:center;padding:0 40px;display:flex}.ch3-leak-arrows{font-size:80px;font-family:var(--font-mono);letter-spacing:5px;font-weight:700;animation:.5s linear infinite leakFlow}.ch3-leak-label-box{color:#fff;background:#ef4444;border-radius:8px;margin-top:20px;padding:12px 24px}.ch3-leak-label{font-size:28px;font-weight:700}.ch3-leak-desc{opacity:.9;margin-top:8px;font-size:18px}.ch3-mushroom-viz-large{aspect-ratio:1;background:var(--surface-2);border:1px solid var(--rule);border-radius:16px;justify-content:center;align-items:center;width:100%;padding:40px;display:flex;box-shadow:0 10px 30px #0000004d}@keyframes pulseZone{0%,to{opacity:.8}50%{opacity:1}}@keyframes leakFlow{0%{transform:translate(-20px)}to{transform:translate(20px)}}.ch4-scene{width:100%;height:100%;color:var(--text);font-family:var(--font-body);position:relative;overflow:hidden}.ch4-bg-dark{background-color:var(--surface)}.ch4-bg-image{z-index:0;background-position:50%;background-size:cover;width:100%;height:100%;position:absolute;top:0;left:0}.ch4-bg-overlay{z-index:1;background:linear-gradient(90deg,#000000f2 0%,#0009 100%);width:100%;height:100%;position:absolute;top:0;left:0}.ch4-content{z-index:2;box-sizing:border-box;flex-direction:column;width:100%;height:100%;padding:80px 100px;display:flex;position:relative}.ch4-title-area{margin-top:80px;margin-bottom:40px}.ch4-huge-title{color:#fff;text-shadow:0 4px 15px #00000080;margin:0;font-size:5rem;font-weight:800}.ch4-huge-subtitle{color:var(--accent);margin-top:10px;font-size:2.5rem;font-weight:400}.ch4-section-title{color:var(--accent);border-bottom:2px solid #38bdf84d;margin-bottom:40px;padding-bottom:10px;font-size:3rem;font-weight:700}.ch4-center{text-align:center}.ch4-scene .card{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#1e293bd9;border:1px solid #ffffff1a;border-radius:12px;padding:30px;box-shadow:0 10px 30px #00000080}.ch4-dense-panel{max-width:800px}.ch4-intro-text{color:#cbd5e1;margin-bottom:30px;font-size:1.5rem;line-height:1.6}.ch4-param-grid{grid-template-columns:1fr 1fr;gap:20px;display:grid}.ch4-param-item{border-left:4px solid var(--accent);background:#0000004d;border-radius:8px;flex-direction:column;padding:20px;display:flex}.ch4-label{color:#94a3b8;margin-bottom:5px;font-size:1.2rem}.ch4-value{color:#fff;font-size:2rem;font-weight:700}.ch4-unit{color:#cbd5e1;font-size:1.2rem;font-weight:400}.ch4-scene .hero-num{color:var(--accent)}.ch4-three-cols{gap:30px;height:100%;display:flex}.ch4-col-dense{flex-direction:column;flex:1;display:flex}.ch4-highlight-col{border:2px solid var(--accent);background:#0f172af2;transform:scale(1.02);box-shadow:0 0 40px #38bdf833}.ch4-col-dense h3{color:#f8fafc;margin-top:0;margin-bottom:20px;font-size:2.2rem}.ch4-tech-table{flex-direction:column;gap:15px;margin-bottom:20px;display:flex}.ch4-tech-row{border-bottom:1px solid #ffffff0d;justify-content:space-between;padding-bottom:10px;display:flex}.ch4-tl{color:#94a3b8;font-size:1.2rem}.ch4-tv{color:#e2e8f0;text-align:right;max-width:60%;font-size:1.2rem;font-weight:600}.ch4-col-desc{color:#cbd5e1;background:#0003;border-radius:6px;margin-top:auto;padding:15px;font-size:1.2rem;line-height:1.5}.ch4-split-64,.ch4-split-layout{gap:40px;height:100%;display:flex}.ch4-split-left,.ch4-split-right{flex-direction:column;display:flex}.ch4-massive-img-container{background:#00000080;border:1px solid #ffffff1a;border-radius:12px;flex:1;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.ch4-massive-img{object-fit:cover;width:100%;height:100%}.ch4-particles{pointer-events:none;position:absolute;inset:0}.ch4-particle{opacity:0;background:#fff;border-radius:50%;position:absolute}.ch4-p-fine{width:6px;height:6px;animation:2s linear infinite p-fly;top:50%;left:50%;box-shadow:0 0 10px #fff}.ch4-p-fine2{width:4px;height:4px;animation:2.5s linear .5s infinite p-fly;top:55%;left:55%;box-shadow:0 0 8px #fff}.ch4-p-coarse{background:#64748b;width:12px;height:12px;animation:1.5s ease-in infinite p-drop;top:40%;left:48%}@keyframes p-fly{0%{opacity:0;transform:translate(0)}20%{opacity:1}80%{opacity:1}to{opacity:0;transform:translate(-150px,-300px)}}@keyframes p-drop{0%{opacity:1;transform:translate(0)}to{opacity:0;transform:translate(80px,150px)}}.ch4-hot-air{gap:150px;display:flex;position:absolute;bottom:20%;left:50%;transform:translate(-50%)}.ch4-air-arrow{color:#ef4444;text-shadow:0 0 20px #ef4444cc;opacity:0;font-size:4rem;font-weight:900}.ch4-up-1{animation:1.5s ease-out infinite air-rise}.ch4-up-2{animation:1.5s ease-out .75s infinite air-rise}@keyframes air-rise{0%{opacity:0;transform:translateY(50px)}50%{opacity:.8}to{opacity:0;transform:translateY(-150px)}}.ch4-text-block{justify-content:center}.ch4-step-list-large{flex-direction:column;gap:25px;margin:0;padding:0;list-style:none;display:flex}.ch4-step-list-large li{background:#0000004d;border-radius:8px;padding:20px;font-size:1.4rem;line-height:1.6;transition:all .3s}.ch4-active-bullet{border-left:5px solid var(--accent);color:#fff;background:#38bdf81a!important}.ch4-dim-bullet{color:#64748b;opacity:.5;border-left:5px solid #0000}.ch4-center-flex{text-align:center;justify-content:center;align-items:center}.ch4-seal-animation{width:100%;max-width:1000px;padding:40px}.ch4-seal-row{justify-content:space-between;align-items:center;height:250px;margin-bottom:40px;display:flex}.ch4-seal-box{border:2px solid;border-radius:12px;flex-direction:column;flex:1;justify-content:center;align-items:center;height:100%;display:flex}.ch4-box-coal{background:#f59e0b1a;border-color:#f59e0b}.ch4-box-air{background:#3b82f61a;border-color:#3b82f6}.ch4-seal-box h3{margin:0 0 10px;font-size:2rem}.ch4-seal-box p{color:#cbd5e1;margin:0 0 20px;font-size:1.2rem}.ch4-pressure{font-size:3.5rem;font-weight:800}.ch4-seal-wall{background:#38bdf833;border-left:4px dashed #38bdf8;border-right:4px dashed #38bdf8;flex-direction:column;justify-content:center;align-items:center;width:200px;height:120%;display:flex;position:relative;overflow:hidden}.ch4-seal-arrows{color:#38bdf8;letter-spacing:15px;font-size:3rem;animation:1s linear infinite seal-flow}@keyframes seal-flow{0%{opacity:0;transform:translateY(-50px)}50%{opacity:1}to{opacity:0;transform:translateY(50px)}}.ch4-seal-label{color:#38bdf8;font-size:1.2rem;font-weight:700;position:absolute;bottom:20px}.ch4-seal-desc{text-align:justify;font-size:1.5rem;line-height:1.6}.ch4-split-50{gap:40px;width:100%;height:100%;display:flex}.ch4-interlock-grid{grid-template-columns:1fr 1fr;gap:40px;height:calc(100% - 150px);display:grid}.ch4-interlock-card{border-radius:12px;flex-direction:column;padding:40px;display:flex}.ch4-card-green{background:#10b9811a;border:2px solid #10b981}.ch4-card-red{background:#ef44441a;border:2px solid #ef4444}.ch4-card-title-lg{text-align:center;margin:0;font-size:2.8rem}.ch4-card-green .ch4-card-title-lg{color:#10b981}.ch4-card-red .ch4-card-title-lg{color:#ef4444}.ch4-card-sub{text-align:center;color:#cbd5e1;margin-bottom:40px;font-size:1.2rem}.ch4-check-list{flex-direction:column;gap:20px;margin:0;padding:0;list-style:none;display:flex}.ch4-check-list li{background:#0000004d;border-radius:8px;padding:15px 20px;font-size:1.6rem}.ch4-check-ok{color:#a7f3d0;border-left:4px solid #10b981}.ch4-check-fail{color:#fecaca;border-left:4px solid #ef4444}.ch4-fault-grid{grid-template-rows:1fr 1fr;grid-template-columns:1fr 1fr;gap:30px;width:100%;max-width:1200px;height:600px;display:grid}.ch4-fault-card{flex-direction:column;padding:25px;display:flex}.ch4-fault-header{border-bottom:2px solid #ffffff1a;margin-bottom:20px;padding-bottom:10px;font-size:1.8rem;font-weight:700}.ch4-warn{color:#f59e0b;border-bottom-color:#f59e0b4d}.ch4-danger{color:#ef4444;border-bottom-color:#ef44444d}.ch4-info{color:#38bdf8;border-bottom-color:#38bdf84d}.ch4-fault-card p{color:#e2e8f0;margin:0 0 15px;font-size:1.3rem;line-height:1.5}.ch4-action{background:#0000004d;border-radius:6px;padding:15px;color:#a7f3d0!important;margin-top:auto!important}.ch4-highlight-box{background:#38bdf80d;border:2px solid #38bdf84d;border-radius:10px;padding:25px}.ch4-rich-text{color:var(--text-2);padding:40px;font-size:24px;line-height:1.8}.ch4-tech-list{color:var(--text-2);margin:0;padding:0;font-size:22px;line-height:1.8;list-style:none}.ch4-tech-list li{margin-bottom:16px;padding-left:24px;position:relative}.ch4-tech-list li:before{content:"•";color:var(--accent);font-size:28px;position:absolute;top:-4px;left:0}.ch4-tech-list strong{color:var(--text)}.ch4-side{flex-direction:column;gap:30px;display:flex}.ch5-scene{width:100%;height:100%;color:var(--text);font-family:var(--font-body);position:relative;overflow:hidden}.ch5-bg-dark{background-color:var(--surface)}.ch5-content{z-index:2;box-sizing:border-box;flex-direction:column;width:100%;height:100%;padding:80px 100px;display:flex;position:relative}.ch5-section-title{color:var(--accent);border-bottom:2px solid #38bdf84d;margin-bottom:40px;padding-bottom:10px;font-size:3rem;font-weight:700}.ch5-center{text-align:center}.ch5-center-flex{text-align:center;justify-content:center;align-items:center}.ch5-full-layout{justify-content:flex-start}.ch5-massive-diagram{background:#00000080;border:1px solid #ffffff1a;border-radius:12px;flex:1;justify-content:center;align-items:center;width:100%;display:flex;position:relative;overflow:hidden}.ch5-diagram-img{object-fit:contain;opacity:.75;width:100%;height:100%}.ch5-flow-overlay{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.ch5-path-cold{stroke:#60a5fa;stroke-width:8px;stroke-dasharray:10 10;opacity:.5}.ch5-path-main{stroke:#fff;stroke-width:10px;opacity:.7}.ch5-path-hot{stroke:#ef4444;stroke-width:8px;stroke-dasharray:15 10;opacity:.8}.ch5-path-cold-bypass{stroke:#60a5fa;stroke-width:6px;stroke-dasharray:5 5;opacity:.8}.ch5-path-mixed{stroke:#fcd34d;stroke-width:8px;stroke-dasharray:10 10;opacity:.8}.ch5-path-coal{stroke:#333;stroke-width:12px;opacity:.9}.ch5-stage-labels{pointer-events:none;width:100%;height:100%;position:absolute;top:0;left:0}.ch5-label{-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);border-radius:30px;padding:10px 20px;font-size:1.5rem;font-weight:700;position:absolute;box-shadow:0 4px 15px #00000080}.ch5-l-blue{background:#3b82f6cc;border:2px solid #60a5fa}.ch5-l-cyan{background:#06b6d4cc;border:2px solid #22d3ee}.ch5-l-red{background:#ef4444cc;border:2px solid #f87171}.ch5-l-yellow{background:#f59e0bcc;border:2px solid #fbbf24}.ch5-l-dark{color:#fff;background:#1e293be6;border:2px solid #94a3b8}.ch5-split-ducts{gap:40px;width:100%;max-width:1200px;margin-bottom:40px;display:flex}.ch5-duct{flex-direction:column;flex:1;display:flex}.ch5-duct-hot{border-top:5px solid #ef4444}.ch5-duct-cold{border-top:5px solid #3b82f6}.ch5-duct h3{margin-top:0;font-size:2.2rem}.ch5-duct-hot h3{color:#fca5a5}.ch5-duct-cold h3{color:#93c5fd}.ch5-route{color:#cbd5e1;margin-bottom:25px;font-size:1.3rem}.ch5-route strong{color:#fff}.ch5-stat-row{border-bottom:1px solid #ffffff1a;justify-content:space-between;padding:15px 0;display:flex}.ch5-stat-label{color:#94a3b8;font-size:1.4rem}.ch5-stat-val{font-size:1.6rem;font-weight:700}.ch5-role{background:#0000004d;border-radius:8px;margin-top:auto;padding:15px;font-size:1.3rem;line-height:1.5}.ch5-mix-point{text-align:center;margin-top:20px}.ch5-mix-arrow{color:#fbbf24;margin-bottom:10px;font-size:2rem;animation:1.5s infinite pulse-op}.ch5-mix-temp{background:#f59e0b33;border:2px solid #fbbf24;border-radius:40px;padding:15px 40px;font-size:3rem;display:inline-block}@keyframes pulse-op{0%,to{opacity:.5}50%{opacity:1}}.ch5-split-layout{gap:50px;height:100%;display:flex}.ch5-split-left,.ch5-split-right{flex-direction:column;min-width:0;display:flex;overflow:hidden}.ch5-table-card{padding:20px;overflow:hidden}.ch5-data-table{border-collapse:collapse;word-break:break-word;width:100%}.ch5-data-table th,.ch5-data-table td{text-align:left;text-align:left;border-bottom:1px solid #ffffff1a;padding:20px;font-size:1.4rem}.ch5-data-table th{color:var(--accent);border-bottom:2px solid #38bdf880;font-weight:600}.ch5-row-highlight{background:#38bdf81a}.ch5-table-note{color:#64748b;text-align:right;margin-top:15px;font-size:1.1rem}.ch5-chart-svg{width:100%;height:300px;margin-bottom:20px}.ch5-chart-desc{color:#cbd5e1;font-size:1.2rem;line-height:1.5}.ch5-param-board{flex:1;gap:40px;width:100%;display:flex}.ch5-board-col{flex-direction:column;flex:1;min-width:0;padding:30px;display:flex}.ch5-col-icon{text-align:center;margin-bottom:20px;font-size:4rem}.ch5-board-col h3{text-align:center;color:var(--accent);margin-bottom:30px;font-size:2rem}.ch5-board-col ul{flex-direction:column;flex:1;gap:18px;margin:0;padding:0;list-style:none;display:flex}.ch5-board-col li{background:#0003;border-radius:8px;justify-content:space-between;align-items:center;min-width:0;padding:14px 18px;display:flex}.ch5-board-col .lbl{color:#cbd5e1;white-space:nowrap;margin-right:10px;font-size:1.2rem}.ch5-board-col .val{white-space:nowrap;font-size:1.5rem;font-weight:700}.ch5-col-footer{color:#94a3b8;text-align:center;margin-top:24px;font-size:1.05rem;font-style:italic;line-height:1.5}.ch5-burner-card{flex-direction:column;justify-content:center;align-items:center;height:100%;display:flex;overflow:hidden}.ch5-burner-svg{align-items:center;width:380px;height:380px;margin-bottom:40px;display:flex;position:relative}.ch5-b-outer{z-index:2;background:#3b82f633;border:4px solid #3b82f6;border-radius:50%;justify-content:center;align-items:center;width:280px;height:280px;display:flex;position:relative}.ch5-b-inner{background:#1e293be6;border:4px solid 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p{color:var(--text-2);margin:0;font-size:1.2rem}.ch6-dcs-top{background:#f59e0b0d;border-left-color:#f59e0b}.ch6-dcs-mid{border-left-color:var(--accent);background:#38bdf80d}.ch6-dcs-bot{background:#10b9810d;border-left-color:#10b981}.ch6-checklist-grid{flex:1;grid-template-columns:repeat(4,1fr);gap:24px;display:grid}.ch6-checklist-col{border:2px solid;border-radius:12px;flex-direction:column;padding:25px;display:flex}.ch6-checklist-col h3{text-align:center;border-bottom:2px solid;margin:0 0 24px;padding-bottom:16px;font-size:1.8rem}.ch6-checklist-col ul{flex-direction:column;gap:14px;margin:0;padding:0;list-style:none;display:flex}.ch6-checklist-col li{background:#0003;border-radius:6px;padding:10px 14px;font-size:1.2rem}.ch6-cl-pah{border-color:#f59e0b}.ch6-cl-pah h3{color:#f59e0b;border-bottom-color:#f59e0b}.ch6-cl-pah li{color:#fcd34d}.ch6-cl-idf{border-color:#3b82f6}.ch6-cl-idf h3{color:#60a5fa;border-bottom-color:#3b82f6}.ch6-cl-idf 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30px;padding-bottom:16px;font-size:2rem}.ch6-fan-fdf h3{color:#34d399;border-bottom-color:#10b981}.ch6-fan-paf h3{color:var(--accent);border-bottom-color:var(--accent)}.ch6-fan-steps{flex-direction:column;gap:15px;margin:0;padding:0;list-style:none;display:flex}.ch6-fan-steps li{background:#0003;border-radius:8px;padding:14px;font-size:1.4rem}.ch6-timeline{flex-direction:column;flex:1;gap:24px;display:flex}.ch6-time-row{align-items:center;gap:20px;display:flex}.ch6-time-label{text-align:right;min-width:120px;font-size:1.4rem;font-weight:700}.ch6-time-bar-wrap{background:#ffffff0d;border-radius:8px;flex:1;height:40px;overflow:hidden}.ch6-time-bar{border-radius:8px;height:100%;animation:.8s ease-out 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