@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@media (max-width:768px){.diagram-grid,.stats-grid,.faq-grid{grid-template-columns:1fr!important}}.hero-section{background:linear-gradient(#f0f9ff 0%,#e0f2fe 100%);border-bottom:1px solid #bae6fd;padding:6rem 2rem;position:relative}.hero-bg-decoration{opacity:.1;pointer-events:none;background-image:radial-gradient(#3b82f6 1px,#0000 1px);background-size:32px 32px;height:100%;position:absolute;top:0;left:0;right:0;-webkit-mask-image:linear-gradient(#000 40%,#0000 100%);mask-image:linear-gradient(#000 40%,#0000 100%)}.search-section{z-index:20;max-width:640px;margin:0 auto;position:relative}.search-input{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffe6;border:1px solid #e5e7eb;border-radius:16px;outline:none;width:100%;padding:16px 60px 16px 24px;font-size:18px;transition:all .3s cubic-bezier(.4,0,.2,1);box-shadow:0 4px 6px -1px #0000000d,0 10px 15px -3px #0000000d}.search-input:focus{background:#fff;border-color:#3b82f6;transform:translateY(-2px);box-shadow:0 0 0 4px #3b82f626,0 10px 25px -5px #0000001a}.search-button{cursor:pointer;background:#2563eb;border:none;border-radius:12px;justify-content:center;align-items:center;width:44px;height:44px;transition:all .2s;display:flex;position:absolute;top:50%;right:10px;transform:translateY(-50%);box-shadow:0 2px 4px #2563eb33}.search-button:hover{background:#1d4ed8;transform:translateY(-50%)scale(1.05);box-shadow:0 4px 6px #2563eb4d}.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px #0000001a}.card-header{background:#fafafa;border-bottom:1px solid #e5e7eb;padding:20px 24px}.card-title{align-items:center;gap:12px;display:flex}.card-icon{background:linear-gradient(135deg,#111827 0%,#374151 100%);border-radius:8px;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.diagram-container{border:1px solid #e5e7eb;border-radius:8px;position:relative;overflow:hidden;box-shadow:0 4px 6px -1px #0000001a}.hotspot-highlight{pointer-events:none;background:#ef444433;border:3px solid #ef4444;border-radius:6px;animation:2s cubic-bezier(.4,0,.6,1) infinite pulse}.hotspot-label{color:#fff;white-space:nowrap;background:#ef4444;border-radius:6px;padding:5px 12px;font-size:12px;font-weight:700;position:absolute;top:-28px;left:50%;transform:translate(-50%);box-shadow:0 4px 6px -1px #0000001a}.hotspot-area{cursor:pointer;background:0 0;border-radius:4px;transition:background .15s}.hotspot-area:hover{background:#3b82f633}.part-button{cursor:pointer;color:#4b5563;background:#fff;border:1px solid #d1d5db;border-radius:6px;padding:8px 14px;font-size:13px;font-weight:500;transition:all .15s}.part-button.active{color:#fff;background:#111827;border:2px solid #111827;font-weight:600;box-shadow:0 4px 6px -1px #0000001a}.part-button:hover:not(.active){background:#f9fafb;border-color:#9ca3af}.guide-container{background:#f9fafb;padding:24px}.guide-placeholder{text-align:center;color:#9ca3af;padding:60px 20px}.guide-content{background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:24px}.difficulty-badge{border-radius:4px;padding:4px 10px;font-size:12px;font-weight:600;display:inline-block}.difficulty-easy{color:#16a34a;background:#dcfce7}.difficulty-medium{color:#ca8a04;background:#fef9c3}.difficulty-hard{color:#dc2626;background:#fee2e2}.stat-item{text-align:center;background:#fafafa;border-radius:8px;padding:16px}.stat-label{color:#6b7280;margin-bottom:4px;font-size:13px}.stat-value{color:#111827;font-size:15px;font-weight:600}.placeholder-hint-text{color:#6b7280;margin:0;font-size:15px;font-weight:500}.placeholder-sub-text{color:#9ca3af;margin-top:8px;font-size:13px}.amazon-link{color:#fff;background:#f90;border-radius:6px;align-items:center;gap:6px;margin-top:16px;padding:10px 18px;font-size:14px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.amazon-link:hover{background:#ec8b00;transform:translateY(-1px);box-shadow:0 4px 6px -1px #0003}.tip-box{background:#eff6ff;border-left:4px solid #3b82f6;border-radius:4px;margin-top:16px;padding:12px 16px}.tip-label{color:#1e40af;margin-bottom:4px;font-size:13px;font-weight:600}.tip-text{color:#1e3a8a;margin:0;font-size:13px;line-height:1.5}.page-container{background:#f9fafb;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}.hero-content{text-align:center;max-width:1100px;margin:0 auto;position:relative}.hero-title{color:#111827;letter-spacing:-.02em;margin:0 0 12px;font-size:40px;font-weight:800}.hero-subtitle{color:#6b7280;max-width:600px;margin:0 auto 32px;font-size:16px}.search-section{max-width:640px;margin:0 auto;position:relative}.search-button svg{color:#fff;width:20px;height:20px}.search-results{z-index:10;background:#fff;border:1px solid #e5e7eb;border-radius:8px;max-height:300px;margin-top:8px;position:absolute;top:100%;left:0;right:0;overflow:auto;box-shadow:0 10px 15px -3px #0000001a}.search-result-header{color:#6b7280;background:#f9fafb;border-bottom:1px solid #e5e7eb;padding:8px 16px;font-size:12px;font-weight:500}.search-result-item{border-bottom:1px solid #f3f4f6;padding:12px 16px;font-size:14px;transition:background .2s}.search-result-item:last-child{border-bottom:none}.search-result-found{color:#1f2937;cursor:pointer}.search-result-found:hover{background:#f3f4f6}.search-result-not-found{color:#9ca3af;cursor:default}.main-content{max-width:1100px;margin:0 auto;padding:48px 16px}.diagram-section{background:#fff;border:1px solid #e5e7eb;border-radius:12px;margin-bottom:48px;overflow:hidden;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.diagram-header{background:linear-gradient(90deg,#fafafa 0%,#fff 100%);border-bottom:1px solid #e5e7eb;padding:24px 28px}.diagram-header-content{flex-wrap:nowrap;align-items:center;gap:12px;display:flex}.diagram-title-wrapper{text-align:center;width:100%}.diagram-title-wrapper h2{color:#111827;margin:0 0 8px;font-size:28px;font-weight:800}.diagram-title-wrapper p{color:#6b7280;margin:0;font-size:15px}.diagram-grid{grid-template-columns:minmax(500px,55%) 1fr;gap:0;min-height:600px;display:grid}.diagram-image-container{background:#f8fafc;border-right:1px solid #f1f5f9;flex-direction:column;align-items:center;padding:32px;display:flex;position:relative}.diagram-image-wrapper{border:4px solid #fff;border-radius:16px;width:100%;max-width:550px;position:relative;overflow:hidden;box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -4px #0000000d}.diagram-image-wrapper img{width:100%;height:auto}@media (max-width:768px){.hero-section{padding:40px 20px 60px!important}.hero-title{font-size:32px!important}.hero-subtitle{font-size:15px!important}.main-content{padding:32px 16px!important}.diagram-header-content{flex-wrap:wrap!important}.diagram-title-wrapper h2{font-size:17px!important}.diagram-title-wrapper p{font-size:12px!important}.diagram-image-container{border-right:none!important}}.part-buttons-container{flex-wrap:wrap;gap:8px;margin-top:20px;display:flex}.guide-panel{flex-direction:column;min-height:450px;padding:28px;display:flex}.guide-panel.active{background:linear-gradient(135deg,#f9fafb 0%,#fff 100%)}.guide-panel.inactive{background:#fafafa}.guide-content-wrapper{flex:1}.guide-header{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:20px;display:flex}.guide-title{color:#111827;align-items:center;gap:8px;margin:0;font-size:20px;font-weight:700;display:flex}.guide-title span{font-size:24px}.difficulty-tag{border-radius:6px;padding:5px 14px;font-size:12px;font-weight:600}.cause-box{background:#fff;border-left:4px solid #111827;border-radius:8px;margin-bottom:20px;padding:16px;box-shadow:0 1px 3px #0000001a}.cause-box strong{color:#111827;font-size:13px}.cause-box span{color:#4b5563;font-size:14px}.stats-grid{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px;display:grid}.stat-box{background:#fff;border:1px solid #e5e7eb;border-radius:8px;flex-direction:column;justify-content:center;padding:16px;display:flex;box-shadow:0 1px 2px #0000000d}.cost-box{background:linear-gradient(90deg,#f0f9ff,#e0f2fe);border-color:#bae6fd;grid-column:1/-1}.cost-box .stat-box-value{color:#0369a1;font-size:18px}.time-box,.tools-box{background:#fafafa}.stat-box-label{color:#6b7280;margin-bottom:6px;font-size:11px;font-weight:600}.stat-box-value{color:#111827;font-size:15px;font-weight:700}.stat-box-value.small{font-size:14px}.steps-box{background:#fff;border:1px solid #e5e7eb;border-radius:8px;margin-bottom:18px;padding:16px;box-shadow:0 1px 2px #0000000d}.steps-box strong{color:#111827;font-size:14px}.steps-list{color:#374151;margin:12px 0 0;padding-left:22px;font-size:14px;line-height:1.7}.steps-list li{margin-bottom:8px}.tip-box-yellow{background:#fffbeb;border:1px solid #fcd34d;border-radius:8px;margin-bottom:18px;padding:14px;font-size:14px}.tip-box-yellow strong{color:#92400e}.tip-box-yellow span{color:#78350f}.buy-button{color:#fff;background:linear-gradient(135deg,#111827 0%,#1f2937 100%);border:1px solid #111827;border-radius:8px;align-items:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:700;text-decoration:none;transition:all .2s;display:inline-flex;box-shadow:0 4px 6px -1px #0000001a}.buy-button:hover{transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000001a}.buy-button svg{width:16px;height:16px}.placeholder-box{background:#fff;border:2px dashed #e5e7eb;border-radius:8px;flex:1;justify-content:center;align-items:center;display:flex}.placeholder-content{text-align:center;color:#9ca3af;padding:40px 20px}.placeholder-content p{margin:8px 0 0;font-size:13px}.faq-section{background:#fff;border:1px solid #e5e7eb;border-radius:24px;padding:48px;box-shadow:0 10px 15px -3px #0000000d}.faq-header{text-align:center;margin-bottom:32px}.faq-header h2{color:#111827;margin:0 0 8px;font-size:28px;font-weight:800}.faq-header p{color:#6b7280;margin:0;font-size:15px}.faq-grid{grid-template-columns:1fr 1fr;gap:16px;display:grid}.hotspot-positioned{position:absolute}.faq-item{background:#f8fafc;border:1px solid #f1f5f9;border-radius:16px;padding:24px;transition:all .3s cubic-bezier(.4,0,.2,1)}.faq-item:hover{background:#fff;border-color:#3b82f6;transform:translateY(-2px);box-shadow:0 10px 15px -3px #0000000d}.faq-question{color:#111827;align-items:center;gap:8px;margin:0;font-size:15px;font-weight:600;display:flex}.faq-question-icon{color:#2563eb;background:#dbeafe;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;font-weight:700;display:flex}.faq-answer{color:#6b7280;margin:12px 0 0 36px;font-size:14px;line-height:1.7}.single-guide-section{margin-bottom:0}.part-problems-section{background:linear-gradient(to bottom right,#fff,#f8fafc);border:1px solid #e2e8f0;border-radius:16px;padding:24px;box-shadow:0 4px 6px -1px #0000000d}.part-problems-section h3{color:#1e293b;align-items:center;gap:10px;margin:0 0 8px;font-size:20px;font-weight:800;display:flex}.part-problems-section h3:before{content:"";background:#3b82f6;border-radius:3px;width:6px;height:24px;display:block}.part-problems-section p{color:#64748b;margin-bottom:24px;padding-left:16px;font-size:14px}.problem-list{flex-direction:column;gap:16px;display:flex}.problem-item{cursor:pointer;background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:20px;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}.problem-item:after{content:"→";color:#cbd5e1;font-size:20px;font-weight:300;transition:all .3s;position:absolute;top:50%;right:20px;transform:translateY(-50%)}.problem-item:hover{border-color:#3b82f6;transform:translateY(-2px);box-shadow:0 10px 15px -3px #3b82f61a,0 4px 6px -4px #3b82f60d}.problem-item:hover:after{color:#3b82f6;transform:translate(4px,-50%)}.problem-item h4{color:#1e293b;margin:0 0 8px;padding-right:24px;font-size:17px;font-weight:700}.problem-symptoms{color:#64748b;margin:0;padding-right:24px;font-size:14px;line-height:1.6}.guide-divider{background:linear-gradient(90deg,#0000,#e5e7eb 20% 80%,#0000);height:2px;margin:32px 0}