:root{--bg-deep:#f8fafc;--bg-page:#ffffff;--bg-card:rgba(255,255,255,0.92);--bg-card-solid:#ffffff;--bg-muted:#f1f5f9;--border-subtle:rgba(15,23,42,0.08);--border-strong:rgba(15,23,42,0.12);--text:#0f172a;--text-muted:#64748b;--accent:#0d8bd9;--accent-dim:#0369a1;--accent-glow:rgba(13,139,217,0.28);--accent-soft:rgba(13,139,217,0.1);--shadow-sm:0 1px 2px rgba(15,23,42,0.06);--shadow-md:0 8px 24px rgba(15,23,42,0.08);--shadow-lg:0 20px 50px rgba(15,23,42,0.1);--radius:12px;--radius-lg:20px;--header-h:72px;--max-w:1180px;--ease-spring:cubic-bezier(0.34,1.3,0.64,1);--ease-out:cubic-bezier(0.22,1,0.36,1)}@keyframes fade-in-up{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes float-soft{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}*,:after,:before{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Noto Sans SC,system-ui,-apple-system,sans-serif;font-size:16px;line-height:1.65;color:var(--text);background:var(--bg-page);background-image:radial-gradient(ellipse 100% 80% at 50% -30%,rgba(13,139,217,.09),transparent 55%),radial-gradient(ellipse 50% 40% at 100% 0,rgba(3,105,161,.06),transparent 50%),linear-gradient(180deg,#ffffff,#f8fafc 45%,#ffffff);background-attachment:fixed}#root,body{min-height:100vh}#root{display:flex;flex-direction:column}a{color:var(--accent);text-decoration:none;transition:color .2s var(--ease-out)}a:hover{color:var(--accent-dim)}img{max-width:100%;height:auto;display:block}h1,h2,h3,h4{line-height:1.25;font-weight:600;margin:0 0 .5em}ol,p,ul{margin:0 0 1em;color:var(--text-muted)}ol,ul{padding-left:1.25em}.layout-main{flex:1 1;display:flex;flex-direction:column;margin-top:var(--header-h);min-height:calc(100vh - var(--header-h))}.page{flex:1 1;padding:2.5rem 1.25rem 4rem;max-width:var(--max-w);margin:0 auto;width:100%}.page-narrow{max-width:820px}.section-title{font-size:clamp(1.5rem,3vw,2rem);color:var(--text);text-align:center;margin-bottom:.35em}.section-sub{text-align:center;max-width:640px;margin:0 auto 2.5rem;font-size:.95rem}.btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.5rem;border-radius:999px;font-weight:500;font-size:.95rem;border:none;cursor:pointer;overflow:hidden;transition:transform .22s var(--ease-spring),box-shadow .25s var(--ease-out),background .2s}.btn:after{content:"";position:absolute;inset:-50%;background:linear-gradient(105deg,transparent 35%,rgba(255,255,255,.45) 50%,transparent 65%);transform:translateX(-100%) rotate(12deg);transition:transform .55s var(--ease-out);pointer-events:none}.btn:hover:after{transform:translateX(100%) rotate(12deg)}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}.btn:active{transform:scale(.96)}.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-dim));color:#fff;box-shadow:var(--shadow-md),0 4px 20px var(--accent-glow)}.btn-primary:hover{color:#fff;transform:translateY(-2px) scale(1.02);box-shadow:var(--shadow-lg),0 12px 36px var(--accent-glow)}.btn-primary:active{transform:scale(.96)}.btn-ghost{background:var(--bg-card-solid);color:var(--text);border:1px solid var(--border-strong);box-shadow:var(--shadow-sm)}.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-ghost:active{transform:scale(.96)}.card-grid{display:grid;grid-gap:1.25rem;gap:1.25rem;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}.card{background:var(--bg-card-solid);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-sm);transition:transform .28s var(--ease-spring),box-shadow .28s var(--ease-out),border-color .2s}.card:hover{border-color:rgba(13,139,217,.25);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.tag{display:inline-block;font-size:.75rem;padding:.2rem .55rem;border-radius:6px;background:var(--accent-soft);color:var(--accent-dim);margin-bottom:.75rem;transition:transform .2s var(--ease-spring)}.card:hover .tag,a:hover .tag{transform:scale(1.05)}.prose{color:var(--text-muted)}.prose h2{color:var(--text);font-size:1.35rem;margin-top:1.75rem}.prose h3{color:var(--text);font-size:1.1rem;margin-top:1.25rem}.prose img{max-width:100%;height:auto;border-radius:var(--radius);margin:1rem 0;border:1px solid var(--border-subtle);transition:transform .35s var(--ease-out),box-shadow .35s}.prose img:hover{transform:scale(1.01);box-shadow:var(--shadow-md)}.prose strong{color:var(--text)}.prose iframe,.prose video{display:block;width:100%;max-width:100%;margin:1rem 0;border-radius:var(--radius);border:1px solid var(--border-subtle);background:#0f172a;box-shadow:var(--shadow-sm)}.prose video{height:auto}.prose iframe{aspect-ratio:16/9}.link-animated{background-image:linear-gradient(currentColor,currentColor);background-position:0 100%;background-repeat:no-repeat;background-size:0 1px;transition:background-size .25s var(--ease-out)}.link-animated:hover{background-size:100% 1px}