:root{--bg:#ffffff;--bg-light:#f8f9fa;--bg-header:#ffffff;--bg-hover:#e9ecef;--bg-active:#dee2e6;--text:#212529;--text-light:#6c757d;--text-dark:#1a1a1a;--text-heading:#2d3748;--primary:#5a67d8;--primary-hover:#4c51bf;--primary-dark:#434190;--border:#e2e8f0;--shadow:rgba(0,0,0,0.08);--shadow-dark:rgba(0,0,0,0.15);--logo-shadow:rgba(90,103,216,0.3);--toggle-shadow:rgba(90,103,216,0.25);--gradient-primary:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--gradient-accent:linear-gradient(135deg,#f093fb 0%,#f5576c 100%);--toggle-bg:linear-gradient(135deg,#667eea 0%,#764ba2 100%);--input-bg:#ffffff;--card-bg:#ffffff}[data-theme="dark"]{--bg:#0f1419;--bg-light:#1a1f2e;--bg-header:#141820;--bg-hover:#2d3748;--bg-active:#3d4a5c;--text:#e2e8f0;--text-light:#a0aec0;--text-dark:#f7fafc;--text-heading:#63b3ed;--primary:#63b3ed;--primary-hover:#4299e1;--primary-dark:#3182ce;--border:#2d3748;--shadow:rgba(0,0,0,0.3);--shadow-dark:rgba(0,0,0,0.5);--logo-shadow:rgba(99,179,237,0.4);--toggle-shadow:rgba(99,179,237,0.3);--gradient-primary:linear-gradient(135deg,#4facfe 0%,#00f2fe 100%);--gradient-accent:linear-gradient(135deg,#43e97b 0%,#38f9d7 100%);--toggle-bg:linear-gradient(135deg,#4facfe 0%,#00f2fe 100%);--input-bg:#1a1f2e;--card-bg:#1a1f2e}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;min-height:100dvh;transition:background 0.3s ease,color 0.3s ease;line-height:1.6;-webkit-text-size-adjust:100%;overflow-x:hidden}header{background:var(--bg-header);border-bottom:1px solid var(--border);padding:1rem 1.5rem;position:relative;z-index:10}.header-container{max-width:800px;margin:0 auto;display:flex;align-items:center;gap:1rem}.header-container img{width:56px;height:56px;border-radius:50%;box-shadow:0 4px 12px var(--logo-shadow);cursor:pointer;transition:transform 0.3s ease,box-shadow 0.3s ease;flex-shrink:0}.header-container img:active{transform:scale(0.95)}.header-content{flex:1;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:0.75rem}.header-content h1{color:var(--text-heading);font-size:1.35rem;font-weight:700;display:flex;align-items:center;gap:0.5rem}.header-content h1::before{content:'\f002';font-family:'Font Awesome 7 Free';font-weight:900;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-buttons{display:flex;gap:0.5rem;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.5rem 1rem;border-radius:8px;font-size:0.85rem;font-weight:500;text-decoration:none;cursor:pointer;border:none;transition:transform 0.2s ease,box-shadow 0.2s ease,opacity 0.2s ease;-webkit-tap-highlight-color:transparent}.btn-primary,.theme-switch{background:var(--gradient-primary);color:#fff !important;box-shadow:0 3px 10px var(--toggle-shadow)}.btn-primary:active,.theme-switch:active{transform:scale(0.97);opacity:0.9}.btn-secondary{background:var(--bg-light);color:var(--text) !important;border:1px solid var(--border)}.btn-secondary:active{background:var(--bg-active)}.theme-switch::before{content:'\f186';font-family:'Font Awesome 7 Free';font-weight:900}[data-theme="dark"] .theme-switch::before{content:'\f185'}.author-qq-button::before{content:'\f015';font-family:'Font Awesome 7 Free';font-weight:900}main{max-width:800px;margin:0 auto;padding:1.5rem 1rem;padding-bottom:calc(1.5rem + env(safe-area-inset-bottom,0))}.tool-card{background:var(--card-bg);border-radius:16px;padding:1.5rem;box-shadow:0 4px 20px var(--shadow);border:1px solid var(--border);animation:fadeInUp 0.4s ease}.tool-card + .tool-card{margin-top:1.25rem}.card-header{text-align:center;margin-bottom:1.5rem}.card-header h2{color:var(--text-heading);font-size:1.25rem;margin-bottom:0.4rem;display:flex;align-items:center;justify-content:center;gap:0.5rem}.card-header h2 i{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.card-header p{color:var(--text-light);font-size:0.9rem}.form-group{margin-bottom:1.25rem}.form-label{display:flex;align-items:center;gap:0.5rem;margin-bottom:0.5rem;font-weight:600;color:var(--text-dark);font-size:0.95rem}.form-label i{color:var(--primary);width:18px;text-align:center}.qq-container{position:relative}.qq-select{width:100%;padding:0.875rem 1rem;border:2px solid var(--border);border-radius:10px;background:var(--input-bg);color:var(--text);font-size:1rem;transition:border-color 0.3s ease,box-shadow 0.3s ease;cursor:pointer;appearance:none;-webkit-appearance:none}.qq-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--toggle-shadow)}.input-wrapper{position:relative}.input-wrapper > i{position:absolute;left:1rem;top:50%;transform:translateY(-50%);color:var(--primary);font-size:1rem;pointer-events:none;z-index:1}.qq-input{width:100%;padding:0.875rem 1rem 0.875rem 2.75rem;border:2px solid var(--border);border-radius:10px;background:var(--input-bg);color:var(--text);font-size:1rem;transition:border-color 0.3s ease,box-shadow 0.3s ease;-webkit-appearance:none;appearance:none}.qq-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--toggle-shadow)}.qq-input::placeholder{color:var(--text-light);opacity:0.8}.select2-container{width:100% !important}.select2-container--default .select2-selection--single{height:auto;min-height:52px;padding:0.75rem 1rem;border:2px solid var(--border);border-radius:10px;background:var(--input-bg);transition:border-color 0.3s ease,box-shadow 0.3s ease}.select2-container--default .select2-selection--single .select2-selection__rendered{color:var(--text);line-height:1.5;padding:0;font-size:1rem}.select2-container--default .select2-selection--single .select2-selection__arrow{height:100%;right:12px;top:0}.select2-container--default .select2-selection--single .select2-selection__arrow b{border-color:var(--text-light) transparent transparent transparent;border-width:6px 5px 0 5px}.select2-container--default.select2-container--open .select2-selection--single{border-color:var(--primary);box-shadow:0 0 0 3px var(--toggle-shadow)}.select2-dropdown{background:var(--card-bg);border:2px solid var(--border);border-radius:10px;box-shadow:0 10px 40px var(--shadow-dark);overflow:hidden;margin-top:4px}.select2-search--dropdown{padding:0.75rem}.select2-search--dropdown .select2-search__field{width:100%;padding:0.625rem 0.875rem;border:2px solid var(--border);border-radius:8px;background:var(--input-bg);color:var(--text);font-size:0.95rem;outline:none;transition:border-color 0.3s ease}.select2-search--dropdown .select2-search__field:focus{border-color:var(--primary)}.select2-results__options{max-height:280px;overflow-y:auto}.select2-container--default .select2-results__option{padding:0.75rem 1rem;color:var(--text);transition:background 0.15s ease;font-size:0.95rem}.select2-container--default .select2-results__option--highlighted[aria-selected]{background:var(--gradient-primary);color:#fff}.select2-container--default .select2-results__option[aria-selected=true]{background:var(--bg-hover);color:var(--text)}.select2-container--default .select2-results__group{padding:0.625rem 1rem;font-weight:600;color:var(--text-heading);background:var(--bg-light);border-top:1px solid var(--border);font-size:0.85rem;text-transform:uppercase;letter-spacing:0.5px}.select2-container--default .select2-results__group:first-child{border-top:none}.qq-button{display:flex;align-items:center;justify-content:center;gap:0.75rem;width:100%;padding:1rem 2rem;margin-top:1.5rem;background:var(--gradient-primary);color:#fff !important;border:none;border-radius:12px;font-size:1.05rem;font-weight:600;cursor:pointer;text-decoration:none;transition:transform 0.2s ease,box-shadow 0.2s ease,opacity 0.2s ease;box-shadow:0 4px 15px var(--toggle-shadow);-webkit-tap-highlight-color:transparent}.qq-button i{font-size:1rem}.qq-button:active{transform:scale(0.98);opacity:0.9}.feature-tags{display:flex;flex-wrap:wrap;gap:0.5rem;margin-top:1.5rem;padding-top:1.25rem;border-top:1px solid var(--border);justify-content:center}.feature-tag{display:inline-flex;align-items:center;gap:0.35rem;padding:0.35rem 0.75rem;background:var(--bg-light);color:var(--text-light);border-radius:20px;font-size:0.8rem;border:1px solid var(--border)}.feature-tag i{color:var(--primary);font-size:0.75rem}.quick-actions{display:grid;grid-template-columns:repeat(3,1fr);gap:0.75rem;margin-top:1.25rem}.quick-action-btn{display:flex;flex-direction:column;align-items:center;gap:0.4rem;padding:1rem 0.5rem;background:var(--bg-light);border:1px solid var(--border);border-radius:12px;color:var(--text);text-decoration:none;cursor:pointer;transition:transform 0.2s ease,background 0.2s ease,border-color 0.2s ease;-webkit-tap-highlight-color:transparent}.quick-action-btn i{font-size:1.35rem;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.quick-action-btn span{font-size:0.8rem;font-weight:500;color:var(--text)}.quick-action-btn:active{transform:scale(0.96);background:var(--bg-hover)}footer{text-align:center;padding:1.5rem 1rem;color:var(--text-light);font-size:0.85rem}footer a{color:var(--primary);text-decoration:none;font-weight:500}.toast-notification{position:fixed;top:20px;left:50%;transform:translateX(-50%);padding:0.875rem 1.25rem;background:var(--gradient-primary);color:#fff;border-radius:10px;box-shadow:0 6px 20px rgba(0,0,0,0.25);z-index:10000;animation:toastIn 0.3s ease;display:flex;align-items:center;gap:0.5rem;font-size:0.9rem;max-width:calc(100% - 2rem);text-align:center}@keyframes fadeInUp{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:translateY(0)}}@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(-10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}@media (hover:hover) and (pointer:fine){.header-container img:hover{transform:scale(1.05)}.btn-primary:hover,.theme-switch:hover{transform:translateY(-2px);box-shadow:0 6px 20px var(--toggle-shadow)}.btn-secondary:hover{background:var(--bg-hover);border-color:var(--primary)}.qq-button:hover{transform:translateY(-2px);box-shadow:0 8px 25px var(--toggle-shadow)}.quick-action-btn:hover{background:var(--bg-hover);border-color:var(--primary);transform:translateY(-2px)}}@media (max-width:600px){header{padding:0.875rem 1rem}.header-container{gap:0.75rem}.header-container img{width:48px;height:48px}.header-content h1{font-size:1.15rem}.header-buttons{gap:0.4rem}.btn{padding:0.45rem 0.75rem;font-size:0.8rem}main{padding:1rem 0.875rem}.tool-card{padding:1.25rem;border-radius:14px}.card-header h2{font-size:1.1rem}.card-header p{font-size:0.85rem}.quick-actions{grid-template-columns:repeat(3,1fr);gap:0.6rem}.quick-action-btn{padding:0.875rem 0.4rem}.quick-action-btn i{font-size:1.2rem}.quick-action-btn span{font-size:0.75rem}.qq-button{padding:0.9rem 1.5rem;font-size:1rem}}@media (max-width:380px){.header-content{flex-direction:column;align-items:flex-start}.quick-actions{grid-template-columns:repeat(2,1fr)}}@media (hover:hover) and (pointer:fine){[data-tooltip]{position:relative}[data-tooltip]::after{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);padding:0.5rem 0.75rem;background:var(--text-dark);color:var(--bg);font-size:0.75rem;border-radius:6px;white-space:nowrap;opacity:0;visibility:hidden;transition:all 0.2s ease;z-index:1000;pointer-events:none}[data-tooltip]:hover::after{opacity:1;visibility:visible}}