#app-content[data-theme=light]{--primary-light: #6c83f7;--darker: #020617;--gray-light: #94a3b8}#app-content[data-theme=light] .hero{background:linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #eef2ff 100%)}#app-content[data-theme=light] .hero h1{color:#1e293b}#app-content[data-theme=light] .hero p{color:#64748b}#app-content[data-theme=light] .hero::after{background:#f0f4ff;background:linear-gradient(135deg, #f0f4ff, #e0e7ff)}#app-content[data-theme=light] .file-info-bar{background:#f1f5f9}#app-content[data-theme=light] .preview-container{background:#f8fafc}#app-content[data-theme=light] .setting-card{background:#f8fafc}#app-content[data-theme=light] .setting-card select{background:#fff;color:#1e293b}#app-content[data-theme=light] .loading-overlay{background:rgba(248,250,252,.9)}#app-content[data-theme=light] .loading-text{color:#1e293b}#app-content[data-theme=light] .stat-box{background:#f8fafc}#app-content[data-theme=light] .stat-box .s-val{color:#1e293b}#app-content[data-theme=light] .progress-wrap{background:#f8fafc}#app-content[data-theme=light] .success-message h4{color:#059669}#app-content[data-theme=dark]{--primary-light: #6c83f7;--darker: #020617;--gray-light: #94a3b8}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:"Inter",system-ui,-apple-system,sans-serif;background:var(--bg-body);color:var(--text-primary);line-height:1.75;overflow-x:hidden;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3}a{color:var(--primary);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-light)}img{max-width:100%;height:auto}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.section{padding:60px 0}@media(max-width: 768px){.section{padding:40px 0}}::selection{background:var(--primary);color:#fff}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-body)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--gray)}.hero{padding:100px 0 80px;background:linear-gradient(135deg, #0b2b5c 0%, #1a4a8b 50%, #2563eb 100%);color:var(--text-primary);position:relative;overflow:hidden;text-align:center}.hero::before{content:"";position:absolute;top:-50%;left:-20%;width:600px;height:600px;background:radial-gradient(circle, rgba(67, 97, 238, 0.08) 0%, transparent 70%);pointer-events:none}.hero::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:60px;background:var(--bg-body);clip-path:ellipse(55% 100% at 50% 100%)}.hero .hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(67,97,238,.15);color:var(--primary);padding:8px 20px;border-radius:50px;font-size:.85rem;font-weight:600;margin-bottom:20px;border:1px solid rgba(67,97,238,.2)}.hero h1{font-size:clamp(2rem,5vw,3.5rem);font-weight:900;margin-bottom:16px;line-height:1.2}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:600px;margin:0 auto;line-height:1.7}.tool-wrapper{margin-top:-30px;position:relative;z-index:10;padding-bottom:2rem}.tool-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:2.5rem;box-shadow:var(--shadow);border:1px solid var(--border)}.upload-zone{border:2.5px dashed rgba(67,97,238,.3);border-radius:var(--radius-lg);padding:3.5rem 2rem;text-align:center;cursor:pointer;transition:all .3s;background:rgba(67,97,238,.03)}.upload-zone:hover,.upload-zone.dragover{border-color:var(--primary);background:rgba(67,97,238,.07);transform:scale(1.01)}.upload-zone .icon{font-size:3.5rem;color:var(--primary);margin-bottom:16px}.upload-zone h3{font-size:1.3rem;margin-bottom:8px}.upload-zone p{color:var(--text-secondary);margin-bottom:20px}.content-section{padding:40px 0}.content-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:40px;margin-bottom:32px;box-shadow:var(--shadow);border:1px solid var(--border)}.content-card h2{font-size:1.5rem;margin-bottom:16px;color:var(--text-primary)}.content-card h3{font-size:1.2rem;margin-bottom:12px;color:var(--text-primary)}.content-card p{color:var(--text-secondary);margin-bottom:16px;line-height:1.8}.content-card ul{color:var(--text-secondary);margin-bottom:16px;padding-left:20px}.content-card ul li{margin-bottom:8px}.file-info-bar{background:var(--bg-body);border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;font-size:.88rem;color:var(--text-secondary);margin-bottom:1rem}.file-info-bar .info-chip{display:inline-flex;align-items:center;gap:6px;background:var(--bg-card);padding:4px 12px;border-radius:8px;border:1px solid var(--border);white-space:nowrap}.file-info-bar .info-chip i{color:var(--primary);font-size:.8rem}.preview-container{background:var(--bg-body);border-radius:var(--radius);padding:1.5rem;min-height:250px;border:1px solid var(--border);overflow:auto}.excel-preview-table{border-collapse:collapse;width:100%;font-family:"Inter",sans-serif;font-size:13px}.excel-preview-table td{border:1px solid #e5e7eb;padding:8px 12px}.excel-preview-table tr:first-child td{background:#f3f4f6;font-weight:600}.settings-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));gap:16px;margin:16px 0}.setting-card{background:var(--bg-body);border:1px solid var(--border);border-radius:var(--radius);padding:1rem;transition:border-color .2s}.setting-card:focus-within{border-color:var(--primary)}.setting-card label{font-size:.82rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:8px;display:flex;align-items:center;gap:6px}.setting-card label i{color:var(--primary);font-size:.9rem}.setting-card select,.setting-card input[type=checkbox]{border:1.5px solid var(--border);border-radius:8px;padding:10px 12px;font-size:.92rem;color:var(--text-primary);background:var(--bg-card);width:100%;cursor:pointer}.setting-card select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(67,97,238,.1)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;font-weight:600;font-size:.95rem;border-radius:10px;border:none;cursor:pointer;transition:all .25s;text-decoration:none}.btn-primary{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;box-shadow:0 4px 15px rgba(67,97,238,.3)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(67,97,238,.4);color:#fff}.btn-success{background:linear-gradient(135deg, var(--success), #059669);color:#fff;box-shadow:0 4px 15px rgba(6,214,160,.3)}.btn-success:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(6,214,160,.4);color:#fff}.btn-outline{background:rgba(0,0,0,0);border:2px solid var(--border);color:var(--text-secondary)}.btn-outline:hover{background:var(--bg-card-hover);color:#fff;transform:translateY(-2px)}.btn-lg{padding:14px 36px;font-size:1.05rem}.btn-block{width:100%}.btn-sm{padding:8px 16px;font-size:.85rem}.d-none{display:none !important}.mt-3{margin-top:1rem !important}.mt-4{margin-top:1.5rem !important}.mb-3{margin-bottom:1rem !important}.mb-4{margin-bottom:1.5rem !important}.row{display:flex;flex-wrap:wrap;gap:16px}.col-md-3{flex:1;min-width:180px}.col-md-4{flex:1;min-width:200px}.col-md-6{flex:1;min-width:250px}@media(max-width: 768px){.col-md-3,.col-md-4,.col-md-6{min-width:100%}}.trust-bar{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;padding:20px;margin:16px 0;background:var(--bg-body);border-radius:var(--radius);border:1px solid var(--border)}.trust-item{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-secondary)}.trust-item i{color:var(--primary)}.case-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(320px, 1fr));gap:24px;margin:24px 0}.case-card{background:var(--bg-body);border-radius:14px;padding:24px;border:1px solid var(--border);transition:all .25s;position:relative}.case-card:hover{transform:translateY(-2px);box-shadow:var(--shadow)}.case-card h3{font-size:1rem;font-weight:600;margin-bottom:12px;color:var(--text-primary)}.case-number{position:absolute;top:12px;right:16px;font-size:2rem;font-weight:900;color:rgba(67,97,238,.08);line-height:1}.case-detail{font-size:.88rem;color:var(--text-secondary);margin-bottom:8px;line-height:1.5}.case-detail strong{color:var(--primary)}.usage-steps{margin:24px 0}.usage-step{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}.usage-step:last-child{margin-bottom:0}.usage-step-num{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.95rem;flex-shrink:0}.usage-step-content{flex:1}.usage-step-content h3{font-size:.95rem;margin-bottom:4px}.usage-step-content p{font-size:.85rem;color:var(--text-secondary);line-height:1.6;margin-bottom:0}.faq-list{max-width:800px;margin:0 auto}.faq-item{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;transition:all .2s;background:var(--bg-body)}.faq-item:hover{border-color:var(--primary)}.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;background:var(--bg-card);border:none;cursor:pointer;font-size:.95rem;font-weight:600;color:var(--text-primary);text-align:left;transition:all .2s}.faq-question:hover{background:rgba(67,97,238,.05)}.faq-toggle{transition:transform .3s;color:var(--gray);flex-shrink:0}.faq-item.open .faq-toggle{transform:rotate(180deg)}.faq-item.open .faq-answer{max-height:800px;padding:16px 20px}.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease,padding .3s ease;padding:0 20px;background:var(--bg-body)}.faq-answer div{font-size:.9rem;color:var(--text-secondary);line-height:1.7}.related-tools{margin:60px 0;padding:40px;background:var(--bg-card);border-radius:var(--radius-xl);box-shadow:var(--shadow);border:1px solid var(--border)}.related-tools h2{font-size:1.5rem;margin-bottom:8px}.related-tools>p{color:var(--text-secondary);margin-bottom:24px}.related-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));gap:12px}.related-card{display:flex;flex-direction:column;padding:14px 16px;background:var(--bg-body);border-radius:var(--radius);border:1px solid var(--border);transition:all .25s;text-decoration:none}.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--primary)}.related-icon{color:var(--primary);font-size:1.2rem;margin-bottom:6px}.related-name{font-weight:600;color:var(--primary);margin-bottom:4px;font-size:.9rem}.related-desc{color:var(--text-muted);font-size:.82rem;line-height:1.4}.smart-badge{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg, rgba(67, 97, 238, 0.15), rgba(114, 9, 183, 0.15));color:var(--primary);padding:4px 12px;border-radius:50px;font-size:.75rem;font-weight:600;border:1px solid rgba(67,97,238,.2)}.smart-badge i{font-size:.7rem}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.85);backdrop-filter:blur(8px);z-index:9998;display:none;align-items:center;justify-content:center;flex-direction:column;gap:16px}.loading-overlay.active{display:flex}.loading-spinner{width:48px;height:48px;border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{color:#fff;font-size:1rem;font-weight:500}.success-message{display:none;background:linear-gradient(135deg, rgba(6, 214, 160, 0.1), rgba(5, 150, 105, 0.1));border:1px solid rgba(6,214,160,.3);border-radius:14px;padding:28px;text-align:center;margin-top:1rem}.success-message.visible{display:block}.success-message i{font-size:2.5rem;color:var(--success);margin-bottom:12px}.success-message h4{color:var(--success);margin-bottom:8px}.success-message p{color:var(--text-secondary);margin-bottom:16px}.theme-float-btn{position:fixed;right:20px;top:50%;transform:translateY(-50%);width:44px;height:44px;border-radius:50%;background:var(--bg-card);color:var(--text-primary);border:1.5px solid var(--border);cursor:pointer;z-index:999;display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:var(--shadow);transition:all .3s}.theme-float-btn:hover{transform:translateY(-50%) scale(1.1);border-color:var(--primary);color:var(--primary)}.back-to-top{position:fixed;bottom:30px;right:30px;width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;border:none;cursor:pointer;z-index:999;display:none;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 4px 15px rgba(67,97,238,.3);transition:all .3s}.back-to-top.show{display:flex}.back-to-top:hover{transform:translateY(-3px)}.notification{position:fixed;bottom:30px;right:30px;padding:16px 24px;border-radius:var(--radius);color:#fff;font-weight:600;font-size:.9rem;z-index:9999;transform:translateY(100px);opacity:0;transition:all .4s}.notification.show{transform:translateY(0);opacity:1}.n-success{background:linear-gradient(135deg, var(--success), #059669)}.n-error{background:linear-gradient(135deg, var(--danger), #dc2626)}.n-info{background:linear-gradient(135deg, var(--primary), var(--primary-dark))}.progress-wrap{background:var(--bg-body);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem;margin-top:1rem}.progress-track{height:8px;background:hsla(0,0%,100%,.06);border-radius:4px;overflow:hidden}.progress-fill{height:100%;width:0%;background:linear-gradient(90deg, var(--primary), var(--accent));border-radius:4px;transition:width .3s}.stats-row{display:grid;grid-template-columns:repeat(auto-fill, minmax(120px, 1fr));gap:10px;margin:12px 0}.stat-box{background:var(--bg-body);border:1px solid var(--border);border-radius:10px;padding:12px;text-align:center}.stat-box .s-val{font-size:1.2rem;font-weight:800;color:var(--text-primary)}.stat-box .s-lbl{font-size:.7rem;text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin-top:2px}@media(max-width: 768px){.tool-card{padding:1.5rem}.upload-zone{padding:2rem 1rem}.content-card{padding:24px}.case-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:repeat(auto-fill, minmax(160px, 1fr))}.settings-grid{grid-template-columns:1fr}.stats-row{grid-template-columns:repeat(2, 1fr)}.hero{padding:80px 0 60px}.related-tools{padding:24px;margin:40px 0}}@media(max-width: 480px){.hero{padding:70px 0 50px}.hero h1{font-size:clamp(1.6rem,7vw,2.2rem)}.hero p{font-size:.95rem}.tool-card{padding:1rem;border-radius:var(--radius-lg)}.upload-zone{padding:1.5rem .75rem;border-width:2px}.upload-zone .icon{font-size:2.6rem}.upload-zone h3{font-size:1.1rem}.btn{width:100%}.content-card{padding:20px 16px}.stat-box{padding:10px}.stats-row{gap:8px}.case-card{padding:20px 16px}.usage-step{gap:12px}.usage-step-num{width:32px;height:32px;font-size:.85rem}.faq-question{padding:14px 16px;font-size:.9rem}.notification{right:12px;left:12px;text-align:center}.back-to-top{bottom:20px;right:20px;width:40px;height:40px}.theme-float-btn{right:14px;width:40px;height:40px}}@media(prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}}