:root{--bg-app: #F8FAFC;--bg-surface: #FFFFFF;--bg-surface-elevated: #FFFFFF;--bg-card: #FFFFFF;--bg-card-hover: #F1F5F9;--bg-subtle: #F1F5F9;--bg-input: #FFFFFF;--border-subtle: #E2E8F0;--border-strong: #CBD5E1;--border-focus: #6366F1;--text-primary: #0F172A;--text-secondary: #475569;--text-muted: #94A3B8;--text-inverse: #FFFFFF;--primary: #4F46E5;--primary-hover: #4338CA;--primary-light: #EEF2FF;--primary-glow: rgba(79, 70, 229, .15);--accent-cyan: #06B6D4;--accent-cyan-light: #ECFEFF;--accent-emerald: #10B981;--accent-emerald-light: #ECFDF5;--accent-amber: #F59E0B;--accent-amber-light: #FFFBEB;--accent-rose: #F43F5E;--accent-rose-light: #FFF1F2;--accent-purple: #8B5CF6;--accent-purple-light: #F5F3FF;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .08), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .04);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .08), 0 8px 10px -6px rgba(0, 0, 0, .04);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "PingFang TC", "Microsoft JhengHei", "Microsoft YaHei", "Noto Sans TC", sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-normal: .25s ease}[data-theme=dark]{--bg-app: #0B0F19;--bg-surface: #111827;--bg-surface-elevated: #1F2937;--bg-card: #131C2E;--bg-card-hover: #1E293B;--bg-subtle: #1E293B;--bg-input: #0F172A;--border-subtle: #1E293B;--border-strong: #334155;--border-focus: #818CF8;--text-primary: #F8FAFC;--text-secondary: #94A3B8;--text-muted: #64748B;--text-inverse: #0F172A;--primary: #6366F1;--primary-hover: #4F46E5;--primary-light: rgba(99, 102, 241, .15);--primary-glow: rgba(99, 102, 241, .25);--accent-cyan-light: rgba(6, 182, 212, .15);--accent-emerald-light: rgba(16, 185, 129, .15);--accent-amber-light: rgba(245, 158, 11, .15);--accent-rose-light: rgba(244, 63, 94, .15);--accent-purple-light: rgba(139, 92, 246, .15);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .5);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .4)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;-moz-tab-size:4;tab-size:4;scroll-behavior:smooth}body{min-height:100vh;line-height:1.6;font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}img,picture,video,canvas,svg{display:block;max-width:100%}input,button,textarea,select{font:inherit;color:inherit}button{cursor:pointer;border:none;background:none}a{color:inherit;text-decoration:none}ul,ol{list-style:none}table{border-collapse:collapse;width:100%}.app-container,#app{min-height:100vh;display:flex;flex-direction:column}.main-container,.main-content{flex:1;max-width:1280px;width:100%;margin:0 auto;padding:24px 20px 60px}.site-header{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.header-container,.header-inner{max-width:1280px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}.nav-brand,.brand-logo{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:800;font-size:1.25rem;color:var(--text-primary);flex-shrink:0}.brand-logo-icon,.brand-badge-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--primary) 0%,var(--accent-purple) 100%);color:#fff;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.2rem;box-shadow:0 4px 12px var(--primary-glow)}.brand-text-wrap{display:flex;align-items:center;gap:8px}.brand-name{font-size:1.2rem;font-weight:800;color:var(--text-primary);letter-spacing:-.01em}.brand-tag{font-size:.72rem;font-weight:800;padding:2px 6px;border-radius:var(--radius-sm);background:var(--primary-light);color:var(--primary);border:1px solid rgba(99,102,241,.25)}.header-search-bar,.header-search-box{flex:1;max-width:480px;position:relative;display:flex;align-items:center}.header-search-bar input,.header-search-input{width:100%;padding:10px 16px 10px 42px;background:var(--bg-subtle);border:1px solid var(--border-subtle);border-radius:var(--radius-full);font-size:.92rem;color:var(--text-primary);transition:all var(--transition-fast)}.header-search-bar input:focus,.header-search-input:focus{outline:none;border-color:var(--border-focus);background:var(--bg-surface);box-shadow:0 0 0 3px var(--primary-glow)}.search-icon,.search-icon-pos{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);pointer-events:none;font-size:1rem}[dir=rtl] .header-search-bar input,[dir=rtl] .header-search-input{padding:10px 42px 10px 16px}[dir=rtl] .search-icon,[dir=rtl] .search-icon-pos{left:auto;right:14px}[dir=rtl] .faq-arrow-icon{transform:scaleX(-1)}.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}.lang-selector-wrap,.lang-dropdown-wrapper{position:relative}.lang-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;background:var(--bg-subtle);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);font-size:.88rem;font-weight:700;cursor:pointer;transition:all var(--transition-fast)}.lang-btn:hover{border-color:var(--primary);color:var(--primary)}.lang-dropdown-menu,.lang-menu{display:none!important;position:absolute;top:calc(100% + 8px);right:0;width:180px;background:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:6px;z-index:999;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);animation:fadeIn .2s ease}[dir=rtl] .lang-dropdown-menu,[dir=rtl] .lang-menu{right:auto;left:0}.lang-dropdown-menu.show,.lang-menu.show{display:block!important}.lang-option{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:var(--radius-sm);color:var(--text-secondary);font-size:.88rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast)}.lang-option:hover{background:var(--primary-light);color:var(--primary)}.lang-option.active{background:var(--primary-light);color:var(--primary);font-weight:800}.theme-toggle-btn,.icon-btn{width:40px;height:40px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;background:var(--bg-subtle);color:var(--text-secondary);border:1px solid var(--border-subtle);cursor:pointer;font-size:1.1rem;transition:all var(--transition-fast)}.theme-toggle-btn:hover,.icon-btn:hover{color:var(--primary);border-color:var(--primary);background:var(--primary-light)}.ad-container{max-width:1280px;margin:20px auto;width:100%}.ad-card-wrapper{background:var(--bg-surface);border:1px dashed var(--border-subtle);border-radius:var(--radius-lg);padding:12px 16px;text-align:center;position:relative;transition:all var(--transition-fast)}.ad-card-wrapper:hover{border-color:var(--primary)}.ad-header-label{display:flex;justify-content:center;margin-bottom:8px}.ad-pill{font-size:.7rem;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;background:var(--bg-subtle);padding:2px 8px;border-radius:var(--radius-sm)}.ad-box-inner{min-height:80px;display:flex;align-items:center;justify-content:center}.ad-placeholder-view{display:flex;align-items:center;justify-content:center;gap:12px;color:var(--text-muted);font-size:.85rem}.ad-icon{font-size:1.5rem;opacity:.7}.ad-text-content{display:flex;flex-direction:column;align-items:flex-start;gap:2px}.ad-main-tip{font-weight:700;color:var(--text-secondary)}.ad-sub-tip{font-size:.78rem}.hero-section{text-align:center;padding:40px 16px 30px;margin-bottom:24px}.hero-pill{display:inline-flex;align-items:center;gap:6px;background:var(--primary-light);color:var(--primary);padding:6px 16px;border-radius:var(--radius-full);font-size:.85rem;font-weight:700;margin-bottom:16px;border:1px solid rgba(99,102,241,.2)}.hero-title{font-size:2.25rem;font-weight:900;letter-spacing:-.02em;margin-bottom:12px;background:linear-gradient(135deg,var(--text-primary) 30%,var(--primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-subtitle{font-size:1.05rem;color:var(--text-secondary);max-width:680px;margin:0 auto 28px}.category-filter-nav{display:flex;gap:8px;overflow-x:auto;padding-bottom:12px;margin-bottom:28px;scrollbar-width:thin}.category-filter-nav::-webkit-scrollbar{height:4px}.category-filter-nav::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:4px}.cat-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:var(--radius-full);background:var(--bg-surface);border:1px solid var(--border-subtle);color:var(--text-secondary);font-size:.92rem;font-weight:600;white-space:nowrap;cursor:pointer;transition:all var(--transition-fast)}.cat-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}.cat-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 12px var(--primary-glow)}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:20px}.tool-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:22px;display:flex;flex-direction:column;justify-content:space-between;transition:all var(--transition-normal);position:relative;text-decoration:none;color:inherit;box-shadow:var(--shadow-sm)}.tool-card:hover{transform:translateY(-3px);border-color:var(--border-focus);box-shadow:var(--shadow-lg)}.tool-card-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:14px}.tool-icon-box{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--bg-subtle);border:1px solid var(--border-subtle);flex-shrink:0}.tool-badge{font-size:.75rem;font-weight:700;padding:3px 8px;border-radius:var(--radius-sm);background:var(--primary-light);color:var(--primary)}.tool-badge-hot{background:var(--accent-rose-light);color:var(--accent-rose)}.tool-title{font-size:1.12rem;font-weight:700;margin-bottom:6px;color:var(--text-primary)}.tool-desc{font-size:.88rem;color:var(--text-secondary);line-height:1.5;margin-bottom:16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.tool-card-footer{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-subtle);font-size:.82rem;color:var(--text-muted)}.tool-open-tag{color:var(--primary);font-weight:700;display:inline-flex;align-items:center;gap:4px}.empty-results{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-icon{font-size:3rem;margin-bottom:12px}.site-footer{background:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:40px 20px 30px;color:var(--text-secondary);font-size:.9rem;margin-top:auto}.footer-container,.footer-inner{max-width:1280px;margin:0 auto 36px;display:grid;grid-template-columns:2fr 1fr;gap:32px}.footer-col-title,.footer-title{font-weight:700;color:var(--text-primary);margin-bottom:14px}.footer-links-list,.footer-links{display:flex;flex-direction:column;gap:8px;list-style:none;padding:0}.footer-links-list a,.footer-links a{color:var(--text-secondary);text-decoration:none;transition:color var(--transition-fast)}.footer-links-list a:hover,.footer-links a:hover{color:var(--primary)}.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid var(--border-subtle);font-size:.84rem;color:var(--text-muted)}@media(max-width:768px){.hero-title{font-size:1.75rem}.footer-container,.footer-inner{grid-template-columns:1fr;gap:24px}.header-container,.header-inner{flex-wrap:wrap}.header-search-bar,.header-search-box{order:3;max-width:100%;width:100%;margin-top:10px}}.tool-layout{display:flex;flex-direction:column;gap:32px}.tool-breadcrumb{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--text-muted);margin-bottom:8px}.tool-breadcrumb a:hover{color:var(--primary)}.tool-header-block{margin-bottom:16px}.tool-header-title{font-size:2rem;font-weight:900;color:var(--text-primary);display:flex;align-items:center;gap:12px;margin-bottom:8px;letter-spacing:-.01em}.tool-header-desc{font-size:1.05rem;color:var(--text-secondary);line-height:1.6}.tool-workbench-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:32px;box-shadow:var(--shadow-md)}.form-group{margin-bottom:20px}.form-label{display:block;font-size:.92rem;font-weight:700;color:var(--text-primary);margin-bottom:8px}.form-hint{font-size:.8rem;color:var(--text-muted);margin-top:4px}.form-input,.form-select,.form-textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1.5px solid var(--border-subtle);border-radius:var(--radius-md);font-size:.95rem;color:var(--text-primary);transition:all var(--transition-fast)}.form-input:focus,.form-select:focus,.form-textarea:focus{outline:none;border-color:var(--border-focus);box-shadow:0 0 0 3px var(--primary-glow)}.form-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}.form-grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}.form-grid-4{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}.btn-primary-action{background:var(--primary);color:#fff;font-weight:700;padding:14px 28px;border-radius:var(--radius-md);display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:1rem;box-shadow:0 4px 14px var(--primary-glow);transition:all var(--transition-fast);cursor:pointer}.btn-primary-action:hover{background:var(--primary-hover);transform:translateY(-2px)}.btn-secondary,.btn-secondary-action{background:var(--bg-subtle);color:var(--text-secondary);border:1px solid var(--border-subtle);font-weight:600;padding:12px 20px;border-radius:var(--radius-md);transition:all var(--transition-fast);cursor:pointer}.btn-secondary:hover,.btn-secondary-action:hover{color:var(--primary);border-color:var(--primary)}.result-display-box{background:var(--primary-light);border:1.5px solid rgba(99,102,241,.3);border-radius:var(--radius-lg);padding:24px;margin-top:24px}.result-main-val{font-size:2.2rem;font-weight:900;color:var(--primary);line-height:1.2}.result-sub-val{font-size:.95rem;color:var(--text-secondary);margin-top:6px}.copy-btn{display:inline-flex;align-items:center;gap:6px;background:var(--bg-surface);color:var(--text-primary);border:1px solid var(--border-subtle);padding:6px 14px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:600;transition:all var(--transition-fast)}.copy-btn:hover{border-color:var(--primary);color:var(--primary)}.tool-intro-section{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:36px 32px;box-shadow:var(--shadow-sm)}.intro-header-center{text-align:center;max-width:680px;margin:0 auto 32px}.intro-main-title{font-size:1.9rem;font-weight:900;color:var(--text-primary);margin:8px 0;letter-spacing:-.01em}.intro-sub-desc{font-size:1rem;color:var(--text-secondary);line-height:1.6}.intro-grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}.intro-card{background:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--radius-lg);padding:24px;display:flex;flex-direction:column;gap:12px;transition:all var(--transition-normal);box-shadow:var(--shadow-sm);text-decoration:none;color:inherit;cursor:pointer}.intro-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:var(--shadow-lg)}.intro-card-header{display:flex;align-items:center;gap:12px}.intro-card-icon{width:42px;height:42px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}.intro-card-title{font-size:1.12rem;font-weight:800;color:var(--text-primary)}.intro-card-text{font-size:.92rem;color:var(--text-secondary);line-height:1.7}.tool-seo-article{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:36px;line-height:1.8;color:var(--text-secondary)}.tool-seo-article h2{font-size:1.45rem;font-weight:800;color:var(--text-primary);margin:28px 0 14px;padding-bottom:8px;border-bottom:2px solid var(--border-subtle)}.tool-seo-article h2:first-child{margin-top:0}.tool-seo-article h3{font-size:1.15rem;font-weight:700;color:var(--text-primary);margin:20px 0 10px}.tool-seo-article p{margin-bottom:16px}.tool-seo-article ul,.tool-seo-article ol{padding-left:24px;margin-bottom:18px}.tool-seo-article li{list-style:disc;margin-bottom:8px}.tool-seo-table{width:100%;margin:20px 0;font-size:.9rem;border-collapse:collapse}.tool-seo-table th{background:var(--bg-subtle);padding:12px 16px;border:1px solid var(--border-subtle);font-weight:700;color:var(--text-primary);text-align:left}.tool-seo-table td{padding:12px 16px;border:1px solid var(--border-subtle)}.faq-section-wrapper{margin-top:36px;padding-top:36px;border-top:1px solid var(--border-subtle)}.faq-header-center{text-align:center;max-width:680px;margin:0 auto 32px}.faq-badge-pill{display:inline-flex;align-items:center;gap:6px;padding:6px 16px;background:var(--primary-light);color:var(--primary);border-radius:var(--radius-full);font-size:.85rem;font-weight:700;margin-bottom:12px;border:1px solid rgba(99,102,241,.2)}.faq-main-title{font-size:1.85rem;font-weight:900;color:var(--text-primary);margin-bottom:8px;letter-spacing:-.01em}.faq-sub-desc{font-size:.95rem;color:var(--text-secondary);line-height:1.6}.faq-accordion-list{display:flex;flex-direction:column;gap:16px;max-width:860px;margin:0 auto}.faq-accordion-card{background:var(--bg-surface);border:1.5px solid var(--border-subtle);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition-normal);box-shadow:var(--shadow-sm)}.faq-accordion-card:hover{border-color:var(--border-focus)}.faq-accordion-card.open{border-color:var(--primary);box-shadow:var(--shadow-md)}.faq-accordion-header{padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;-webkit-user-select:none;user-select:none;background:var(--bg-card);transition:background var(--transition-fast)}.faq-accordion-header:hover{background:var(--bg-subtle)}.faq-q-left{display:flex;align-items:center;gap:14px}.faq-number-badge{display:inline-flex;align-items:center;justify-content:center;width:32px;height:26px;background:var(--primary);color:#fff;font-size:.85rem;font-weight:800;border-radius:6px;flex-shrink:0;letter-spacing:.5px}.faq-q-text{font-size:1.05rem;font-weight:800;color:var(--text-primary);line-height:1.4}.faq-arrow-icon{font-size:1.1rem;color:var(--primary);transition:transform var(--transition-normal);font-weight:800;flex-shrink:0}.faq-accordion-card.open .faq-arrow-icon{transform:rotate(180deg)}.faq-accordion-body{display:none;padding:16px 24px 20px 70px;font-size:.95rem;color:var(--text-secondary);line-height:1.75;background:var(--bg-card);border-top:1px dashed var(--border-subtle)}.faq-accordion-card.open .faq-accordion-body{display:block;animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media(max-width:640px){.tool-workbench-card,.tool-seo-article,.tool-intro-section{padding:20px}.form-grid-2{grid-template-columns:1fr}.tool-header-title,.intro-main-title{font-size:1.5rem}.faq-accordion-header{padding:14px 16px}.faq-accordion-body{padding:14px 16px 16px}.faq-q-text{font-size:.95rem}.faq-main-title{font-size:1.5rem}}