:root{--primary-color:#0284c7;--primary-hover:#0369a1;--primary-light:#e0f2fe;--text-main:#1e293b;--text-muted:#64748b;--bg-main:#f8fafc;--bg-card:#fff;--border-color:#e2e8f0;--shadow-sm:0 1px 3px #0000000d, 0 1px 2px #00000005;--shadow-md:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -2px #0000000a;--transition-normal:all .3s cubic-bezier(.4, 0, .2, 1);--radius-sm:6px;--radius-md:12px;--radius-lg:16px}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-main);color:var(--text-main);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;line-height:1.5}a{color:inherit;text-decoration:none}.container{max-width:1200px;margin:0 auto;padding:0 20px}.app-header{text-align:left;padding:24px 0 20px}.brand-badge{background-color:var(--bg-card);border:1px solid var(--border-color);color:var(--text-main);box-shadow:var(--shadow-sm);transition:var(--transition-normal);border-radius:50px;align-items:center;gap:6px;margin-bottom:20px;padding:8px 16px;font-size:.9rem;font-weight:600;display:inline-flex}.brand-badge:hover{border-color:var(--primary-color);color:var(--primary-color)}.brand-badge svg{width:16px;height:16px;fill:var(--primary-color)}.app-title{color:var(--text-main);letter-spacing:-.025em;margin-bottom:12px;font-size:2.5rem;font-weight:800}.app-description{color:var(--text-muted);max-width:600px;margin:0;font-size:1.1rem}.lang-section{background-color:var(--bg-card);border-bottom:1px solid var(--border-color);z-index:100;width:100%;max-height:42px;padding:10px 0;transition:max-height .35s cubic-bezier(.4,0,.2,1),box-shadow .3s;position:relative;overflow:hidden}.lang-section:hover{max-height:380px;box-shadow:var(--shadow-md)}.lang-list{flex-wrap:wrap;gap:8px 10px;max-width:1200px;margin:0 auto;padding:0 20px;display:flex}.lang-item{border-radius:var(--radius-sm);color:#475569;text-align:center;transition:var(--transition-normal);background-color:#f1f5f9;padding:4px 10px;font-size:.82rem;font-weight:500}.lang-item:hover,.lang-item.active{background-color:var(--primary-light);color:var(--primary-color)}.cards-grid{flex-direction:column;gap:20px;margin-bottom:48px;display:flex}.tool-card{background-color:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);transition:var(--transition-normal);justify-content:space-between;align-items:center;gap:24px;padding:24px;display:flex;position:relative;overflow:hidden}.tool-card:before{content:"";width:4px;height:100%;transition:var(--transition-normal);background-color:#0000;position:absolute;top:0;left:0}.tool-card:hover{box-shadow:var(--shadow-lg);border-color:#cbd5e1;transform:translateY(-2px)}.tool-card:hover:before{background-color:var(--primary-color)}.card-left{flex-direction:column;flex:1;display:flex}.card-title-link{align-self:flex-start;margin-bottom:8px;display:inline-block}.card-title{color:var(--text-main);transition:var(--transition-normal);font-size:1.25rem;font-weight:700}.card-title-link:hover .card-title{color:var(--primary-color)}.tags-row{flex-wrap:wrap;gap:6px;margin-bottom:12px;display:flex}.tag{color:#64748b;background-color:#f1f5f9;border-radius:4px;padding:2px 8px;font-size:.72rem;font-weight:600}.tag.tag-primary{background-color:var(--primary-light);color:var(--primary-color)}.tag.tag-free{color:#16a34a;background-color:#f0fdf4}.card-desc{color:var(--text-muted);font-size:.88rem;line-height:1.6}.card-right{border-left:1px dashed var(--border-color);justify-content:center;align-items:center;min-height:80px;padding-left:24px;display:flex}.btn-use{white-space:nowrap;background-color:var(--primary-color);color:#fff;border-radius:var(--radius-sm);transition:var(--transition-normal);justify-content:center;align-items:center;padding:10px 24px;font-size:.88rem;font-weight:600;display:inline-flex;box-shadow:0 2px 4px #0284c733}.btn-use:hover{background-color:var(--primary-hover);transform:scale(1.03);box-shadow:0 4px 8px #0284c74d}.sub-links{border-top:1px solid var(--border-color);flex-wrap:wrap;gap:6px 16px;margin-top:12px;padding-top:10px;display:flex}.sub-link{color:var(--primary-color);transition:var(--transition-normal);font-size:.75rem;font-weight:500}.sub-link:hover{color:var(--primary-hover);text-decoration:underline}.app-footer{text-align:center;border-top:1px solid var(--border-color);color:var(--text-muted);background-color:#fff;padding:48px 0;font-size:.9rem}.footer-links{flex-wrap:wrap;justify-content:center;gap:20px;margin-bottom:12px;display:flex}.footer-link{transition:var(--transition-normal);font-weight:500}.footer-link:hover{color:var(--primary-color)}@media (width<=768px){.app-title{font-size:2rem}.lang-section{padding:8px 0}.lang-list{padding:0 16px}.tool-card{flex-direction:column;align-items:stretch;gap:16px}.card-right{border-left:none;border-top:1px dashed var(--border-color);justify-content:flex-start;min-height:auto;padding-top:16px;padding-left:0}.btn-use{width:100%;padding:12px}}