:root{--font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;--font-size-xs:0.75rem;--font-size-sm:0.875rem;--font-size-base:1rem;--font-size-lg:1.125rem;--font-size-xl:1.25rem;--font-size-2xl:1.5rem;--font-size-3xl:1.875rem;--font-size-4xl:2.25rem;--font-size-5xl:3rem;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--radius-sm:0.375rem;--radius-md:0.5rem;--radius-lg:0.75rem;--radius-xl:1rem;--radius-2xl:1.5rem;--radius-full:9999px;--shadow-sm:0 1px 2px rgba(0,0,0,0.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);--shadow-xl:0 20px 25px -5px rgba(0,0,0,0.1),0 8px 10px -6px rgba(0,0,0,0.1);--shadow-glow:0 0 40px rgba(124,58,237,0.15);--transition-fast:150ms cubic-bezier(0.4,0,0.2,1);--transition-base:250ms 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rgba(0,0,0,0.3);--input-bg:rgba(255,255,255,0.05);--input-border:rgba(148,163,184,0.15);--input-focus:rgba(124,58,237,0.5);--card-bg:rgba(26,26,62,0.6);--card-border:rgba(148,163,184,0.08);--scrollbar-thumb:rgba(148,163,184,0.2);--scrollbar-track:transparent;--ad-bg:rgba(255,255,255,0.02);--ad-border:rgba(148,163,184,0.06)}[data-theme="light"]{--bg-primary:#f8fafc;--bg-secondary:#f1f5f9;--bg-surface:#ffffff;--bg-elevated:#ffffff;--bg-hover:#f1f5f9;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#94a3b8;--text-inverse:#f8fafc;--border-color:rgba(15,23,42,0.08);--border-hover:rgba(15,23,42,0.15);--accent-primary:#7c3aed;--accent-primary-hover:#6d28d9;--accent-secondary:#0891b2;--accent-success:#059669;--accent-warning:#d97706;--accent-error:#dc2626;--glass-bg:rgba(255,255,255,0.8);--glass-border:rgba(15,23,42,0.06);--glass-shadow:0 8px 32px rgba(0,0,0,0.08);--input-bg:rgba(15,23,42,0.03);--input-border:rgba(15,23,42,0.12);--input-focus:rgba(124,58,237,0.4);--card-bg:rgba(255,255,255,0.9);--card-border:rgba(15,23,42,0.06);--scrollbar-thumb:rgba(15,23,42,0.15);--scrollbar-track:transparent;--ad-bg:rgba(0,0,0,0.02);--ad-border:rgba(15,23,42,0.06)}*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-family);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden;transition:background var(--transition-base),color var(--transition-base)}body::before{content:'';position:fixed;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at 20% 50%,rgba(124,58,237,0.08) 0%,transparent 50%),radial-gradient(ellipse at 80% 20%,rgba(6,182,212,0.06) 0%,transparent 50%),radial-gradient(ellipse at 50% 80%,rgba(59,130,246,0.05) 0%,transparent 50%);z-index:-1;animation:bgFloat 20s ease-in-out infinite}@keyframes bgFloat{0%,100%{transform:translate(0,0) rotate(0deg)}33%{transform:translate(2%,-2%) rotate(1deg)}66%{transform:translate(-1%,1%) rotate(-1deg)}}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-primary-hover)}img{max-width:100%;height:auto}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:var(--accent-primary)}.app-layout{display:flex;min-height:100vh}.sidebar{position:fixed;top:0;left:0;width:var(--sidebar-width);height:100vh;background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-right:1px solid var(--glass-border);z-index:100;display:flex;flex-direction:column;transition:transform var(--transition-slow);overflow-y:auto;overflow-x:hidden}.sidebar-header{padding:var(--space-6) var(--space-6) var(--space-4);border-bottom:1px solid var(--border-color);flex-shrink:0}.sidebar-logo{display:flex;align-items:center;gap:var(--space-3);cursor:pointer;text-decoration:none}.sidebar-logo .logo-icon{width:42px;height:42px;background:var(--gradient-primary);border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:1.4rem;box-shadow:0 4px 15px rgba(124,58,237,0.3);transition:transform var(--transition-spring),box-shadow var(--transition-base)}.sidebar-logo:hover .logo-icon{transform:scale(1.05) rotate(-5deg);box-shadow:0 6px 20px rgba(124,58,237,0.4)}.sidebar-logo .logo-text{font-size:var(--font-size-xl);font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-0.02em}.sidebar-logo .logo-badge{font-size:var(--font-size-xs);font-weight:600;color:var(--accent-secondary);background:rgba(6,182,212,0.1);padding:2px 8px;border-radius:var(--radius-full);letter-spacing:0.05em;margin-left:-4px}.sidebar-search{padding:var(--space-4) var(--space-6);flex-shrink:0}.search-input-wrapper{position:relative;display:flex;align-items:center}.search-input-wrapper .search-icon{position:absolute;left:12px;font-size:var(--font-size-sm);color:var(--text-tertiary);pointer-events:none;transition:color var(--transition-fast)}.search-input{width:100%;padding:10px 12px 10px 38px;background:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--radius-lg);color:var(--text-primary);font-family:var(--font-family);font-size:var(--font-size-sm);outline:none;transition:all var(--transition-fast)}.search-input::placeholder{color:var(--text-tertiary)}.search-input:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--input-focus);background:var(--bg-surface)}.search-input:focus ~ .search-icon{color:var(--accent-primary)}.sidebar-nav{flex:1;padding:var(--space-2) var(--space-3);overflow-y:auto}.nav-group{margin-bottom:var(--space-4)}.nav-group-title{font-size:var(--font-size-xs);font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:0.08em;padding:var(--space-2) var(--space-3);margin-bottom:var(--space-1)}.nav-item{display:flex;align-items:center;gap:var(--space-3);padding:10px var(--space-3);border-radius:var(--radius-lg);color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:500;cursor:pointer;transition:all var(--transition-fast);position:relative;overflow:hidden;text-decoration:none}.nav-item::before{content:'';position:absolute;inset:0;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-fast);border-radius:var(--radius-lg)}.nav-item:hover{color:var(--text-primary);background:var(--bg-hover)}.nav-item.active{color:#ffffff;font-weight:600}.nav-item.active::before{opacity:1}.nav-item .nav-icon{font-size:var(--font-size-lg);width:28px;text-align:center;flex-shrink:0;position:relative;z-index:1}.nav-item .nav-text{position:relative;z-index:1}.nav-item .nav-badge{margin-left:auto;font-size:var(--font-size-xs);font-weight:600;background:rgba(124,58,237,0.15);color:var(--accent-primary);padding:2px 8px;border-radius:var(--radius-full);position:relative;z-index:1}.nav-item.active .nav-badge{background:rgba(255,255,255,0.2);color:#ffffff}.sidebar-footer{padding:var(--space-4) var(--space-6);border-top:1px solid var(--border-color);flex-shrink:0}.theme-toggle{display:flex;align-items:center;gap:var(--space-3);padding:10px var(--space-3);border-radius:var(--radius-lg);cursor:pointer;color:var(--text-secondary);font-size:var(--font-size-sm);font-weight:500;transition:all var(--transition-fast);background:none;border:none;width:100%;font-family:var(--font-family)}.theme-toggle:hover{background:var(--bg-hover);color:var(--text-primary)}.theme-toggle .toggle-icon{font-size:var(--font-size-lg);width:28px;text-align:center}.theme-toggle .toggle-switch{margin-left:auto;width:44px;height:24px;background:var(--input-border);border-radius:var(--radius-full);position:relative;transition:background var(--transition-fast)}.theme-toggle .toggle-switch::after{content:'';position:absolute;top:3px;left:3px;width:18px;height:18px;background:white;border-radius:50%;transition:transform var(--transition-base);box-shadow:0 1px 3px rgba(0,0,0,0.2)}[data-theme="light"] .theme-toggle .toggle-switch{background:var(--accent-primary)}[data-theme="light"] .theme-toggle .toggle-switch::after{transform:translateX(20px)}.main-content{flex:1;margin-left:var(--sidebar-width);min-height:100vh;display:flex;flex-direction:column}.main-header{position:sticky;top:0;z-index:50;height:var(--header-height);background:var(--glass-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--glass-border);display:flex;align-items:center;padding:0 var(--space-8);gap:var(--space-4)}.mobile-menu-btn{display:none;background:none;border:none;color:var(--text-primary);font-size:var(--font-size-xl);cursor:pointer;padding:var(--space-2);border-radius:var(--radius-md);transition:background var(--transition-fast)}.mobile-menu-btn:hover{background:var(--bg-hover)}.header-breadcrumb{display:flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-sm);color:var(--text-tertiary)}.header-breadcrumb a{color:var(--text-tertiary);transition:color var(--transition-fast)}.header-breadcrumb a:hover{color:var(--accent-primary)}.header-breadcrumb .separator{font-size:var(--font-size-xs)}.header-breadcrumb .current{color:var(--text-primary);font-weight:600}.header-actions{margin-left:auto;display:flex;align-items:center;gap:var(--space-3)}.header-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--input-bg);border:1px solid var(--input-border);border-radius:var(--radius-lg);color:var(--text-secondary);font-size:var(--font-size-lg);cursor:pointer;transition:all var(--transition-fast)}.header-btn:hover{background:var(--bg-hover);border-color:var(--border-hover);color:var(--text-primary)}.content-area{flex:1;padding:var(--space-8);max-width:var(--max-content-width);width:100%;margin:0 auto}.ad-slot{background:var(--ad-bg);border:1px dashed 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.stat-value{font-size:var(--font-size-3xl);font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-stat .stat-label{font-size:var(--font-size-sm);color:var(--text-tertiary);font-weight:500}.tools-section{padding:var(--space-8) 0}.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-6)}.section-title{font-size:var(--font-size-2xl);font-weight:700;letter-spacing:-0.02em}.section-subtitle{color:var(--text-secondary);font-size:var(--font-size-sm)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--space-5)}.tool-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:var(--radius-xl);padding:var(--space-6);cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden;text-decoration:none;color:inherit;display:block}.tool-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary);opacity:0;transition:opacity var(--transition-base)}.tool-card:hover{transform:translateY(-4px);border-color:rgba(124,58,237,0.2);box-shadow:var(--shadow-glow)}.tool-card:hover::before{opacity:1}.tool-card-icon{width:52px;height:52px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;font-size:1.6rem;margin-bottom:var(--space-4);transition:transform var(--transition-spring)}.tool-card:hover .tool-card-icon{transform:scale(1.1) rotate(-3deg)}.tool-card-icon.image{background:rgba(239,68,68,0.1)}.tool-card-icon.text{background:rgba(59,130,246,0.1)}.tool-card-icon.design{background:rgba(168,85,247,0.1)}.tool-card-icon.dev{background:rgba(16,185,129,0.1)}.tool-card-title{font-size:var(--font-size-lg);font-weight:700;margin-bottom:var(--space-2);letter-spacing:-0.01em}.tool-card-desc{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:1.6;margin-bottom:var(--space-4)}.tool-card-action{display:inline-flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-sm);font-weight:600;color:var(--accent-primary);transition:gap var(--transition-fast)}.tool-card:hover .tool-card-action{gap:var(--space-3)}.tool-card-action .arrow{transition:transform var(--transition-fast)}.tool-card:hover .tool-card-action .arrow{transform:translateX(2px)}.tool-page{animation:fadeIn 0.4s ease}.tool-page-header{margin-bottom:var(--space-6)}.tool-page-header 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var(--input-border);border-radius:var(--radius-lg);color:var(--text-primary);font-family:var(--font-family);font-size:var(--font-size-base);outline:none;transition:all var(--transition-fast)}.form-input:focus,.form-textarea:focus,.form-select:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px var(--input-focus);background:var(--bg-surface)}.form-textarea{resize:vertical;min-height:120px;line-height:1.6}.form-select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 16px center;padding-right:40px}.form-range{width:100%;height:6px;background:var(--input-border);border-radius:var(--radius-full);outline:none;-webkit-appearance:none;appearance:none}.form-range::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;background:var(--accent-primary);border-radius:50%;cursor:pointer;box-shadow:0 2px 8px rgba(124,58,237,0.3);transition:transform var(--transition-fast)}.form-range::-webkit-slider-thumb:hover{transform:scale(1.15)}.form-range::-moz-range-thumb{width:20px;height:20px;background:var(--accent-primary);border:none;border-radius:50%;cursor:pointer;box-shadow:0 2px 8px rgba(124,58,237,0.3)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:12px 24px;font-family:var(--font-family);font-size:var(--font-size-sm);font-weight:600;border-radius:var(--radius-lg);border:none;cursor:pointer;transition:all var(--transition-fast);text-decoration:none;line-height:1;position:relative;overflow:hidden}.btn:active{transform:scale(0.97)}.btn-primary{background:var(--gradient-primary);color:white;box-shadow:0 4px 15px rgba(124,58,237,0.3)}.btn-primary:hover{box-shadow:0 6px 20px rgba(124,58,237,0.4);transform:translateY(-1px)}.btn-secondary{background:var(--input-bg);border:1px solid var(--input-border);color:var(--text-primary)}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--border-hover)}.btn-success{background:var(--accent-success);color:white;box-shadow:0 4px 15px rgba(16,185,129,0.3)}.btn-success:hover{opacity:0.9}.btn-danger{background:var(--accent-error);color:white}.btn-danger:hover{opacity:0.9}.btn-icon{padding:10px;min-width:40px;min-height:40px}.btn-lg{padding:14px 32px;font-size:var(--font-size-base)}.btn-sm{padding:8px 16px;font-size:var(--font-size-xs)}.btn-group{display:flex;gap:var(--space-3);flex-wrap:wrap}.drop-zone{border:2px dashed var(--border-color);border-radius:var(--radius-xl);padding:var(--space-12) var(--space-8);text-align:center;cursor:pointer;transition:all var(--transition-base);position:relative}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent-primary);background:rgba(124,58,237,0.05)}.drop-zone.drag-over{transform:scale(1.01)}.drop-zone-icon{font-size:3rem;margin-bottom:var(--space-4);opacity:0.6}.drop-zone-text{font-size:var(--font-size-base);color:var(--text-secondary);margin-bottom:var(--space-2)}.drop-zone-hint{font-size:var(--font-size-sm);color:var(--text-tertiary)}.drop-zone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer}.result-area{margin-top:var(--space-6);padding:var(--space-6);background:var(--bg-secondary);border-radius:var(--radius-xl);border:1px solid 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0}.trust-badge{display:inline-flex;align-items:center;gap:var(--space-2);font-size:var(--font-size-sm);color:var(--text-secondary);padding:6px 14px;background:var(--bg-surface);border:1px solid var(--border-color);border-radius:var(--radius-full)}@media (max-width:768px){.seo-content h2{font-size:var(--font-size-xl)}.seo-content h3{font-size:var(--font-size-lg)}.related-tools-grid{grid-template-columns:1fr}.trust-badges{flex-direction:column}.steps-list li{padding-left:44px}}