*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--primary:#6366f1;--primary-light:#818cf8;--primary-dark:#4f46e5;--bg:#f8fafc;--bg-alt:#f1f5f9;--text:#1e293b;--text-secondary:#64748b;--text-muted:#94a3b8;--card-bg:#fff;--card-border:#e2e8f0;--radius:12px;--radius-lg:20px;--shadow:0 4px 24px #0000000f;--shadow-lg:0 12px 48px #00000014;--transition:.3s cubic-bezier(.4, 0, .2, 1)}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans SC,sans-serif;line-height:1.6}a{color:var(--primary);transition:color var(--transition);text-decoration:none}a:hover{color:var(--primary-dark)}.container{max-width:1100px;margin:0 auto;padding:0 24px}.nav{z-index:100;-webkit-backdrop-filter:blur(12px);background:#f8fafccc;border-bottom:1px solid #e2e8f080;justify-content:space-between;align-items:center;padding:16px 32px;display:flex;position:fixed;top:0;left:0;right:0}.nav-brand{color:var(--text);align-items:center;gap:10px;font-size:20px;font-weight:700;display:flex}.nav-logo{width:28px;height:28px;color:var(--primary)}.nav-links{align-items:center;gap:24px;display:flex}.nav-link{color:var(--text-secondary);transition:color var(--transition);font-size:14px;font-weight:500}.nav-link:hover{color:var(--primary)}.nav-link-icon{opacity:.7;transition:opacity var(--transition);align-items:center;display:flex}.nav-link-icon:hover{opacity:1;color:var(--text)}.hero{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:100px 24px 60px;display:flex;position:relative;overflow:hidden}.hero-bg{pointer-events:none;background:radial-gradient(80% 60% at 50% -10%,#6366f11f,#0000),radial-gradient(60% 50% at 80% 80%,#818cf814,#0000),radial-gradient(50% 40% at 20% 70%,#6366f10f,#0000);position:absolute;inset:0}.hero-content{max-width:720px;animation:.8s fadeUp;position:relative}@keyframes fadeUp{0%{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}.hero-icon{width:72px;height:72px;color:var(--primary);margin:0 auto 24px}.hero-icon svg{width:100%;height:100%}.hero-title{letter-spacing:-.03em;background:linear-gradient(135deg, var(--primary), #a78bfa);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:16px;font-size:clamp(48px,10vw,80px);font-weight:800}.hero-subtitle{color:var(--text);margin-bottom:12px;font-size:clamp(18px,3vw,24px);font-weight:600}.hero-desc{color:var(--text-secondary);max-width:560px;margin-bottom:36px;margin-left:auto;margin-right:auto;font-size:16px;line-height:1.8}.hero-actions{flex-wrap:wrap;justify-content:center;gap:16px;display:flex}.btn{transition:all var(--transition);cursor:pointer;border:none;border-radius:999px;align-items:center;gap:8px;padding:14px 32px;font-size:15px;font-weight:600;display:inline-flex}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 4px 16px #6366f14d}.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 6px 24px #6366f166}.btn-secondary{background:var(--card-bg);color:var(--text);border:1px solid var(--card-border)}.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}.hero-scroll{width:24px;height:24px;color:var(--text-muted);animation:2s infinite bounce;position:absolute;bottom:32px}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(8px)}}.section{padding:80px 0}.section-alt{background:var(--bg-alt)}.section-title{text-align:center;letter-spacing:-.02em;margin-bottom:12px;font-size:32px;font-weight:700}.section-desc{color:var(--text-secondary);text-align:center;margin-bottom:48px;font-size:16px}.categories{gap:32px;display:grid}.category-card{background:var(--card-bg);border-radius:var(--radius-lg);border:1px solid var(--card-border);transition:all var(--transition);overflow:hidden}.category-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.category-header{cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:14px;padding:24px 28px 16px;display:flex}.category-header-icon{width:36px;height:36px;color:var(--primary);flex-shrink:0}.category-header-icon svg{width:100%;height:100%}.category-header-info{flex:1;min-width:0}.category-header-name{color:var(--text);font-size:18px;font-weight:600}.category-header-desc{color:var(--text-muted);margin-top:2px;font-size:13px}.category-header-count{color:var(--text-muted);background:var(--bg-alt);white-space:nowrap;border-radius:999px;padding:4px 12px;font-size:13px}.category-tools{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px;padding:0 28px 24px;display:grid}.tool-item{border-radius:var(--radius);background:var(--bg);transition:all var(--transition);border:1px solid #0000;align-items:center;gap:10px;padding:10px 14px;display:flex}.tool-item:hover{border-color:var(--card-border);background:var(--card-bg)}.tool-item-icon{width:20px;height:20px;color:var(--primary-light);flex-shrink:0}.tool-item-icon svg{width:100%;height:100%}.tool-item-info{flex:1;min-width:0}.tool-item-name{color:var(--text);font-size:13px;font-weight:500}.tool-item-desc{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;margin-top:1px;font-size:11px;overflow:hidden}.about-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-bottom:48px;display:grid}.about-card{background:var(--card-bg);border-radius:var(--radius-lg);text-align:center;border:1px solid var(--card-border);transition:all var(--transition);padding:32px}.about-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.about-card-icon{width:44px;height:44px;color:var(--primary);margin:0 auto 16px}.about-card-icon svg{width:100%;height:100%}.about-card h3{margin-bottom:10px;font-size:18px;font-weight:600}.about-card p{color:var(--text-secondary);font-size:14px;line-height:1.7}.about-author{background:var(--card-bg);border-radius:var(--radius-lg);border:1px solid var(--card-border);align-items:center;gap:24px;max-width:640px;margin:0 auto 32px;padding:32px;display:flex}.author-avatar{width:64px;height:64px;color:var(--primary);background:var(--bg-alt);border-radius:50%;flex-shrink:0;padding:14px}.author-avatar svg{width:100%;height:100%}.author-info h3{margin-bottom:4px;font-size:20px;font-weight:700}.author-info p{color:var(--text-secondary);font-size:14px}.author-motto{margin-top:6px;font-style:italic;color:var(--text-muted)!important;font-size:13px!important}.author-contacts{flex-wrap:wrap;gap:16px;margin-top:12px;display:flex}.contact-link{color:var(--text-secondary);transition:color var(--transition);align-items:center;gap:6px;font-size:13px;display:inline-flex}.contact-link svg{width:16px;height:16px}.contact-link:hover{color:var(--primary)}.contact-douyin{cursor:default}.about-credit{text-align:center;color:var(--text-muted);font-size:14px}.about-credit a{color:var(--primary);font-weight:500}.footer{border-top:1px solid var(--card-border);padding:40px 0}.footer-content{text-align:center}.footer-brand{color:var(--text);justify-content:center;align-items:center;gap:8px;margin-bottom:8px;font-size:18px;font-weight:700;display:flex}.footer-brand svg{color:var(--primary)}.footer-desc{color:var(--text-muted);margin-bottom:12px;font-size:14px}.footer-copy{color:var(--text-muted);font-size:13px}@media (width<=768px){.nav{padding:12px 20px}.hero{min-height:90vh;padding:80px 20px 40px}.hero-actions{flex-direction:column;align-items:center}.btn{justify-content:center;width:100%;max-width:280px}.section{padding:56px 0}.category-tools{grid-template-columns:1fr;padding:0 20px 20px}.category-header{padding:20px 20px 12px}.about-author{text-align:center;flex-direction:column;padding:24px}.author-contacts{justify-content:center}}