:root{--bg:#f4f6fb;--surface:#fff;--surface-2:#eef1f7;--text:#15171f;--text-muted:#5d6470;--border:#dfe3ec;--primary:#7c5cff;--primary-hover:#6a48ff;--accent:#22d3ee;--glow:rgba(124,92,255,.18);--grad:linear-gradient(135deg,#7c5cff 0%,#22d3ee 100%);--nav-bg:rgba(244,246,251,.92)}@media (prefers-color-scheme:dark){:root{--bg:#0c0f1a;--surface:#161a26;--surface-2:#1e2433;--text:#e7e9f3;--text-muted:#97a0b5;--border:#2a3142;--primary:#9b85ff;--primary-hover:#8570ff;--accent:#22d3ee;--glow:rgba(155,133,255,.28);--nav-bg:rgba(12,15,26,.92)}}html[data-theme=dark]{--bg:#0c0f1a;--surface:#161a26;--surface-2:#1e2433;--text:#e7e9f3;--text-muted:#97a0b5;--border:#2a3142;--primary:#9b85ff;--primary-hover:#8570ff;--accent:#22d3ee;--glow:rgba(155,133,255,.28);--nav-bg:rgba(12,15,26,.92)}html[data-theme=light]{--bg:#f4f6fb;--surface:#fff;--surface-2:#eef1f7;--text:#15171f;--text-muted:#5d6470;--border:#dfe3ec;--primary:#7c5cff;--primary-hover:#6a48ff;--accent:#22d3ee;--glow:rgba(124,92,255,.18);--nav-bg:rgba(244,246,251,.92)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;transition:background .25s,color .25s}a{color:inherit;text-decoration:none}ul{list-style:none}.container{max-width:1100px;margin:0 auto;padding:0 24px}.section{padding:64px 0}.navbar{z-index:50;background:var(--nav-bg);border-bottom:1px solid var(--border);transition:background .25s,border-color .25s;position:sticky;top:0}@supports (backdrop-filter:blur(10px)){.navbar{-webkit-backdrop-filter:blur(10px)}}.nav-inner{justify-content:space-between;align-items:center;height:60px;display:flex}.logo{align-items:center;gap:8px;font-size:1.15rem;font-weight:700;display:flex}.logo-mark{background:var(--grad);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.4rem}.nav-links{align-items:center;gap:24px;display:flex}.nav-links a{color:var(--text-muted);font-weight:500;transition:color .15s}.nav-links a:hover{color:var(--primary)}.theme-btn{border:1px solid var(--border);background:var(--surface);width:36px;height:36px;color:var(--text-muted);cursor:pointer;border-radius:8px;place-items:center;padding:0;line-height:1;transition:all .15s;display:grid}.theme-btn:hover{border-color:var(--primary);color:var(--primary)}.theme-btn .icon-sun{display:none}.theme-btn .icon-moon,html[data-theme=dark] .theme-btn .icon-sun{display:block}html[data-theme=dark] .theme-btn .icon-moon{display:none}.hero{text-align:center;padding:110px 0 90px;position:relative;overflow:hidden}.hero-inner{z-index:1;position:relative}.hero-title{letter-spacing:-.02em;margin-bottom:16px;font-size:max(2.4rem,min(5.5vw,3.8rem));font-weight:800}.gradient-text{background:var(--grad);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.hero-subtitle{color:var(--text-muted);margin-bottom:36px;font-size:1.1rem;line-height:1.7}.search-bar{max-width:520px;margin:0 auto;position:relative}.search-icon{width:20px;height:20px;color:var(--text-muted);position:absolute;top:50%;left:16px;transform:translateY(-50%)}.search-bar input{border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text);border-radius:12px;outline:none;padding:14px 16px 14px 48px;font-size:1rem;transition:border-color .15s}.search-bar input:focus{border-color:var(--primary)}.search-bar input::placeholder{color:var(--text-muted)}.hero-glow{background:var(--grad);opacity:.14;pointer-events:none;border-radius:50%;width:760px;height:440px;position:absolute;top:-140px;left:50%;transform:translate(-50%)}.section-head{text-align:center;margin-bottom:36px}.section-head h2{margin-bottom:6px;font-size:1.6rem;font-weight:700}.section-head p{color:var(--text-muted)}.category-list{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.category-chip{border:1px solid var(--border);background:var(--surface);color:var(--text-muted);cursor:pointer;border-radius:999px;padding:8px 20px;font-size:.92rem;font-weight:500;transition:all .15s}.category-chip:hover{border-color:var(--primary);color:var(--primary)}.category-chip.active{background:var(--grad);color:#fff;border-color:transparent}.tools-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:20px;display:grid}.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:14px;flex-direction:column;gap:12px;padding:24px;transition:transform .15s,border-color .15s,background .25s;display:flex}.tool-card:hover{border-color:var(--primary);transform:translateY(-3px)}.tool-icon{background:var(--grad);color:#fff;border-radius:10px;place-items:center;width:46px;height:46px;font-size:1.4rem;display:grid}.tool-name{font-size:1.1rem;font-weight:600}.tool-desc{color:var(--text-muted);flex:1;font-size:.9rem;line-height:1.6}.tool-tag{background:color-mix(in srgb,var(--primary) 12%,transparent);color:var(--primary);border-radius:999px;align-self:flex-start;padding:3px 10px;font-size:.78rem;font-weight:500;display:inline-block}.empty-state{text-align:center;color:var(--text-muted);padding:80px 20px}.empty-icon{margin-bottom:16px;font-size:3.5rem}.empty-state h3{color:var(--text);margin-bottom:8px;font-size:1.3rem}.about-card{background:var(--surface);border:1px solid var(--border);text-align:center;border-radius:14px;padding:40px;transition:background .25s}.about-card h2{margin-bottom:12px;font-size:1.5rem;font-weight:700}.about-card p{color:var(--text-muted);margin-bottom:28px;line-height:1.8}.about-stats{flex-wrap:wrap;justify-content:center;gap:48px;display:flex}.stat{flex-direction:column;gap:4px;display:flex}.stat-num{background:var(--grad);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.8rem;font-weight:800}.stat-label{color:var(--text-muted);font-size:.85rem}.footer{border-top:1px solid var(--border);margin-top:40px;padding:24px 0;transition:border-color .25s}.footer-inner{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;font-size:.88rem;display:flex}.footer-links{gap:16px;display:flex}.footer-links a{transition:color .15s}.footer-links a:hover{color:var(--primary)}@media (max-width:640px){.section{padding:48px 0}.about-stats{gap:28px}.about-card{padding:28px 20px}}