:root{--bg-page:#f8fafc;--bg-card:#fff;--bg-card-hover:#fff;--border-card:#e2e8f0;--border-card-hover:#cbd5e1;--text-main:#0f172a;--text-muted:#475569;--text-dim:#94a3b8;--primary:#0284c7;--primary-light:#e0f2fe;--primary-glow:#0284c71f;--code-bg:#f8fafc;--code-border:#e2e8f0;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-page);color:var(--text-main);-webkit-font-smoothing:antialiased;background-image:radial-gradient(at 0 0,#e0f2fe99 0,#0000 50%),radial-gradient(at 100% 0,#f3e8ff80 0,#0000 50%);background-attachment:fixed;min-height:100vh;line-height:1.6}.site-container{flex-direction:column;max-width:1240px;min-height:100vh;margin:0 auto;padding:0 24px;display:flex}.site-header{text-align:center;padding:56px 0 32px}.site-title{letter-spacing:-.025em;color:#0f172a;margin-bottom:12px;font-size:2.5rem;font-weight:800}.site-subtitle{color:var(--text-muted);max-width:640px;margin:0 auto 32px;font-size:1.05rem;line-height:1.7}.control-bar{flex-direction:column;gap:20px;margin-bottom:40px;display:flex}.search-box-wrapper{width:100%;max-width:480px;margin:0 auto;position:relative}.search-icon{color:var(--text-dim);pointer-events:none;position:absolute;top:50%;left:15px;transform:translateY(-50%)}.search-input{border:1px solid var(--border-card);width:100%;color:var(--text-main);background:#fff;border-radius:12px;outline:none;padding:12px 16px 12px 44px;font-size:.95rem;transition:all .2s;box-shadow:0 1px 3px #0000000a}.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow), 0 2px 4px #0000000d}.search-input::placeholder{color:var(--text-dim)}.categories-pills{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.category-pill{border:1px solid var(--border-card);color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;background:#fff;border-radius:9999px;align-items:center;gap:6px;padding:7px 15px;font-size:.88rem;font-weight:500;transition:all .18s;display:inline-flex;box-shadow:0 1px 2px #00000008}.category-pill:hover{color:var(--text-main);border-color:var(--border-card-hover);background:#f1f5f9}.category-pill.active{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600;box-shadow:0 3px 10px #0284c740}.waterfall-grid{column-count:3;flex:1;column-gap:24px;margin-bottom:56px}@media (width<=1024px){.waterfall-grid{column-count:2;column-gap:20px}}@media (width<=640px){.waterfall-grid{column-count:1}.site-title{font-size:2rem}}.card-item{break-inside:avoid;background:var(--bg-card);border:1px solid var(--border-card);border-radius:16px;flex-direction:column;margin-bottom:24px;padding:24px;transition:all .25s cubic-bezier(.16,1,.3,1);display:flex;box-shadow:0 1px 3px #0000000a,0 6px 16px #00000005}.card-item:hover{border-color:var(--border-card-hover);transform:translateY(-3px);box-shadow:0 10px 25px -4px #00000014,0 4px 6px -2px #00000008}.card-header-meta{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.card-badge{letter-spacing:.02em;border-radius:6px;align-items:center;padding:3px 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