:root{--primary:#4f46e5;--primary-light:#6366f1;--primary-dark:#3730a3;--bg:#f0f2f5;--card-bg:#fff;--sidebar-bg:#1e1e2d;--sidebar-hover:#2a2a3d;--sidebar-active:#3a3a5d;--text:#333;--text-light:#666;--text-muted:#999;--border:#e5e7eb;--shadow:0 2px 8px #00000014;--shadow-hover:0 4px 16px #0000001f;--radius:8px;--transition:all .3s ease}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;line-height:1.6;overflow-x:hidden}.layout{min-height:100vh;display:flex}.sidebar{background:var(--sidebar-bg);color:#fff;z-index:100;width:220px;min-width:220px;transition:var(--transition);position:fixed;top:0;bottom:0;left:0;overflow-y:auto}.sidebar-logo{border-bottom:1px solid #ffffff1a;align-items:center;gap:10px;padding:20px;display:flex}.sidebar-logo a{align-items:center;gap:10px;text-decoration:none;display:flex}.sidebar-logo img{border-radius:8px;width:36px;height:36px}.sidebar-logo h1{color:#fff;white-space:nowrap;font-size:18px;font-weight:700}.sidebar-nav{padding:10px 0}.sidebar-nav a{color:#ffffffb3;transition:var(--transition);border-left:3px solid #0000;align-items:center;gap:10px;padding:12px 20px;font-size:14px;text-decoration:none;display:flex}.sidebar-nav a:hover{background:var(--sidebar-hover);color:#fff;border-left-color:var(--primary-light)}.sidebar-nav a.active{background:var(--sidebar-active);color:#fff;border-left-color:var(--primary)}.sidebar-nav a .nav-icon{flex-shrink:0;justify-content:center;align-items:center;width:20px;height:20px;font-size:16px;display:flex}.sidebar-nav a .nav-text{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.sidebar-nav .nav-count{color:#ffffff59;background:#ffffff14;border-radius:10px;margin-left:auto;padding:1px 7px;font-size:11px}.main-content{flex:1;min-width:0;margin-left:220px}.header{background:var(--card-bg);z-index:50;justify-content:space-between;align-items:center;padding:16px 30px;display:flex;position:sticky;top:0;box-shadow:0 1px 4px #0000000f}.header-left{align-items:center;gap:16px;display:flex}.header-search{position:relative}.header-search input{border:1px solid var(--border);width:320px;transition:var(--transition);border-radius:20px;outline:none;padding:8px 16px 8px 36px;font-size:14px}.header-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.header-search .search-icon{color:var(--text-muted);font-size:14px;position:absolute;top:50%;left:12px;transform:translateY(-50%)}.header-right{align-items:center;gap:12px;display:flex}.header-right a{color:var(--text-light);transition:var(--transition);border-radius:4px;padding:6px 12px;font-size:13px;text-decoration:none}.header-right a:hover{color:var(--primary);background:#4f46e50d}.content{padding:20px 30px}.breadcrumb{color:var(--text-muted);margin-bottom:16px;font-size:13px}.breadcrumb a{color:var(--text-light);text-decoration:none}.breadcrumb a:hover{color:var(--primary)}.breadcrumb .sep{color:var(--border);margin:0 6px}.page-head{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px;padding:24px 28px}.page-head h2{align-items:center;gap:10px;font-size:22px;font-weight:700;display:flex}.page-head p{color:var(--text-light);margin-top:8px;font-size:13px}.page-head .sub-tabs{margin-top:14px}.section{margin-bottom:30px}.section-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.section-title{color:var(--text);align-items:center;gap:8px;font-size:18px;font-weight:700;display:flex}.section-title .title-icon{background:var(--primary);color:#fff;border-radius:6px;justify-content:center;align-items:center;width:24px;height:24px;font-size:14px;display:flex}.section-more{color:var(--text-muted);transition:var(--transition);font-size:13px;text-decoration:none}.section-more:hover{color:var(--primary)}.card-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;display:grid}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);transition:var(--transition);cursor:pointer;align-items:flex-start;gap:12px;padding:16px;display:flex;position:relative;overflow:hidden}.card:hover{box-shadow:var(--shadow-hover);transform:translateY(-2px)}.card-main{min-width:0;color:var(--text);flex:1;align-items:flex-start;gap:12px;text-decoration:none;display:flex}.card-icon{object-fit:contain;background:#f5f5f5;border-radius:8px;flex-shrink:0;width:40px;height:40px}.card-info{flex:1;min-width:0}.card-name{color:var(--text);white-space:nowrap;text-overflow:ellipsis;margin-bottom:4px;font-size:14px;font-weight:600;overflow:hidden}.card-desc{color:var(--text-muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:12px;line-height:1.5;display:-webkit-box;overflow:hidden}.card-link{width:24px;height:24px;color:var(--text-muted);opacity:0;transition:var(--transition);justify-content:center;align-items:center;font-size:12px;text-decoration:none;display:flex;position:absolute;top:8px;right:8px}.card:hover .card-link{opacity:1;color:var(--primary)}.tab-bar{border-bottom:2px solid var(--border);gap:0;margin-bottom:16px;display:flex}.tab-item{color:var(--text-muted);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-2px;padding:8px 20px;font-family:inherit;font-size:14px}.tab-item:hover{color:var(--primary)}.tab-item.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}.sub-tabs{flex-wrap:wrap;gap:8px;margin-bottom:12px;display:flex}.sub-tab{color:var(--text-light);cursor:pointer;transition:var(--transition);background:#f0f0f0;border-radius:12px;padding:4px 12px;font-size:12px}.sub-tab:hover,.sub-tab.active{background:var(--primary);color:#fff}.hero-banner{background:linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);border-radius:var(--radius);color:#fff;justify-content:space-between;align-items:center;margin-bottom:24px;padding:30px;display:flex}.hero-text h2{margin-bottom:8px;font-size:24px;font-weight:700}.hero-text p{opacity:.85;font-size:14px}.hero-actions{flex-shrink:0;align-items:center;gap:12px;display:flex}.btn-hero{color:#fff;border-radius:var(--radius);cursor:pointer;transition:var(--transition);white-space:nowrap;background:#ffffff29;border:1px solid #ffffff73;padding:10px 22px;font-family:inherit;font-size:14px;font-weight:600}.btn-hero:hover{background:#ffffff4d}.footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);margin-top:40px;padding:20px;font-size:12px}.footer a{color:var(--text-light);text-decoration:none}.footer a:hover{color:var(--primary)}.footer .beian{margin-top:6px;font-size:12px}.footer .beian a{color:var(--text-muted);margin:0 4px;text-decoration:none}.footer .beian a:hover{color:var(--primary);text-decoration:underline}.footer .beian img{vertical-align:-1px;width:12px;height:12px;margin-right:3px}.mobile-toggle{background:var(--primary);color:#fff;cursor:pointer;z-index:200;border:none;border-radius:50%;width:44px;height:44px;font-size:20px;display:none;position:fixed;bottom:20px;right:20px;box-shadow:0 2px 8px #0003}.back-to-top{background:var(--card-bg);border:1px solid var(--border);cursor:pointer;z-index:90;width:40px;height:40px;box-shadow:var(--shadow);color:var(--text-light);transition:var(--transition);border-radius:50%;justify-content:center;align-items:center;font-size:16px;display:none;position:fixed;bottom:76px;right:20px}.back-to-top:hover{color:var(--primary);border-color:var(--primary)}.back-to-top.visible{display:flex}.tool-detail{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:24px;padding:30px}.tool-detail-head{align-items:flex-start;gap:20px;margin-bottom:20px;display:flex}.tool-detail-icon{object-fit:contain;background:#f5f5f5;border-radius:14px;flex-shrink:0;width:72px;height:72px}.tool-detail-title{flex-wrap:wrap;align-items:center;gap:10px;font-size:24px;font-weight:700;display:flex}.tool-detail-desc{color:var(--text-light);max-width:720px;margin-top:8px;font-size:14px}.tool-detail-meta{border-top:1px solid var(--border);border-bottom:1px solid var(--border);color:var(--text-light);flex-wrap:wrap;gap:20px;margin-bottom:20px;padding:16px 0;font-size:13px;display:flex}.tool-detail-meta .meta-label{color:var(--text-muted);margin-right:6px}.tool-detail-actions{flex-wrap:wrap;gap:12px;display:flex}.btn{border-radius:var(--radius);transition:var(--transition);cursor:pointer;border:none;align-items:center;gap:6px;padding:10px 22px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}.btn-outline{color:var(--primary);border:1px solid var(--primary);background:0 0}.btn-outline:hover{background:#4f46e50f}.prose{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);color:var(--text);padding:28px 32px;font-size:14px;line-height:1.9}.prose h2{margin:20px 0 10px;font-size:18px}.prose h2:first-child{margin-top:0}.prose ul{padding-left:20px}.prose li{margin-bottom:6px}.prose a{color:var(--primary)}.submit-form{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);max-width:640px;padding:28px 32px}.submit-form label{color:var(--text);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.submit-form input,.submit-form textarea,.submit-form select{border:1px solid var(--border);border-radius:var(--radius);width:100%;transition:var(--transition);background:#fff;outline:none;margin-bottom:16px;padding:10px 14px;font-family:inherit;font-size:14px}.submit-form input:focus,.submit-form textarea:focus,.submit-form select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.form-status{margin-top:12px;font-size:13px;line-height:1.6}.form-status:empty{display:none}.form-status.ok{color:#16a34a}.form-status.err{color:#dc2626}.sidebar::-webkit-scrollbar{width:4px}.sidebar::-webkit-scrollbar-thumb{background:#fff3;border-radius:2px}@media (width<=768px){.sidebar{transform:translate(-100%)}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.mobile-toggle{justify-content:center;align-items:center;display:flex}.header-search input{width:200px}.card-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:10px}.content{padding:12px 16px}.tool-detail-head{flex-direction:column;gap:12px}.hero-banner{flex-direction:column;align-items:flex-start;gap:16px}.btn-hero{text-align:center;width:100%}}.card-tag{background:var(--primary);color:#fff;vertical-align:middle;border-radius:4px;margin-left:4px;padding:2px 6px;font-size:10px;display:inline-block}.card.search-hidden,.section.search-hidden{display:none}.loading{text-align:center;color:var(--text-muted);padding:40px}.card-tag.vpn-required{background:#ff6b35;font-size:10px}