:root{--bg: #f5f1ea;--bg-2: #ede7da;--ink: #1a1a1a;--ink-2: #404040;--ink-3: #6b6b6b;--ink-4: #8c8c8c;--ink-5: #b3b3b3;--accent-zh: #c8392f;--accent-zh-glow: rgba(200, 57, 47, .22);--accent-en: #2a8a85;--accent-en-glow: rgba(42, 138, 133, .22);--accent-gold: #a87a3a;--accent-gold-glow: rgba(168, 122, 58, .25);--glass-bg: rgba(255, 255, 255, .55);--glass-bg-strong: rgba(255, 255, 255, .78);--glass-border: rgba(26, 26, 26, .08);--glass-border-strong: rgba(26, 26, 26, .14);--shadow-sm: 0 1px 2px rgba(26, 26, 26, .04), 0 2px 8px -2px rgba(26, 26, 26, .06);--shadow-md: 0 4px 12px -4px rgba(26, 26, 26, .08), 0 8px 24px -8px rgba(26, 26, 26, .1);--shadow-lg: 0 12px 32px -12px rgba(26, 26, 26, .12), 0 24px 64px -24px rgba(26, 26, 26, .15);--font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;--font-zh-display: "Ma Shan Zheng", "Noto Serif SC", "STKaiti", "KaiTi", "楷体", serif;--font-zh-body: "Noto Serif SC", "Source Han Serif SC", "STSong", "宋体", serif;--s-1: 4px;--s-2: 8px;--s-3: 12px;--s-4: 16px;--s-5: 20px;--s-6: 24px;--s-8: 32px;--s-10: 40px;--s-12: 48px;--s-16: 64px;--s-20: 80px;--s-24: 96px}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.6;color:var(--ink);background:var(--bg);background-image:radial-gradient(ellipse at top,rgba(200,57,47,.04),transparent 50%),radial-gradient(ellipse at bottom right,rgba(42,138,133,.04),transparent 50%),repeating-linear-gradient(0deg,transparent,transparent 24px,rgba(26,26,26,.012) 24px,rgba(26,26,26,.012) 25px),repeating-linear-gradient(90deg,transparent,transparent 24px,rgba(26,26,26,.012) 24px,rgba(26,26,26,.012) 25px);background-attachment:fixed;min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:1200px;margin:0 auto;padding:0 var(--s-6)}.nav{position:sticky;top:0;z-index:100;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);background:#f5f1ead9;border-bottom:1px solid var(--glass-border)}.nav-inner{max-width:1200px;margin:0 auto;padding:var(--s-3) var(--s-6);display:flex;align-items:center;justify-content:space-between}.nav-brand{font-family:var(--font-zh-display);font-size:1.3rem;color:var(--accent-zh);text-decoration:none;letter-spacing:.05em}.nav-brand .en{color:var(--ink-2);font-family:var(--font-sans);font-size:.95rem;margin-left:var(--s-2);font-weight:500}.nav-links{display:flex;gap:var(--s-5)}.nav-link{color:var(--ink-2);text-decoration:none;font-size:.95rem;font-weight:500;transition:color .2s}.nav-link:hover{color:var(--accent-zh)}.hero{padding:var(--s-24) 0 var(--s-20);text-align:center;position:relative;overflow:hidden}.hero-watermark{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-family:var(--font-zh-display);font-size:24rem;line-height:1;color:#c8392f0a;pointer-events:none;user-select:none;z-index:0}.hero-inner{position:relative;z-index:1}.hero-eyebrow{display:inline-flex;align-items:center;gap:var(--s-2);font-family:var(--font-mono);font-size:.85rem;color:var(--ink-3);margin-bottom:var(--s-6)}.hero-eyebrow-dot{width:8px;height:8px;background:var(--accent-zh);border-radius:50%;display:inline-block}.display{font-size:clamp(2.5rem,6vw,4.5rem);line-height:1.1;font-weight:600;margin:0 0 var(--s-6);letter-spacing:-.02em}.display .zh{font-family:var(--font-zh-display);color:var(--accent-zh)}.display .en{font-family:var(--font-sans);color:var(--ink)}.hero-tagline{font-size:1.15rem;color:var(--ink-2);max-width:56ch;margin:0 auto var(--s-8);line-height:1.7}.section{padding:var(--s-16) 0}.section-eyebrow{font-family:var(--font-mono);font-size:.85rem;color:var(--ink-3);margin-bottom:var(--s-4)}.section-title{font-size:2rem;font-weight:600;margin:0 0 var(--s-10);max-width:24ch;line-height:1.2}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));gap:var(--s-6)}.knowledge-card{display:block;position:relative;background:var(--glass-bg-strong);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:16px;padding:var(--s-8);text-decoration:none;color:var(--ink);transition:transform .3s cubic-bezier(.2,.8,.2,1),box-shadow .3s,border-color .3s;overflow:hidden;cursor:pointer;--mx: 50%;--my: 50%}.knowledge-card:before{content:"";position:absolute;inset:0;background:radial-gradient(circle 200px at var(--mx) var(--my),rgba(200,57,47,.05),transparent 70%);opacity:0;transition:opacity .3s;pointer-events:none}.knowledge-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--glass-border-strong)}.knowledge-card:hover:before{opacity:1}.card-tag{display:inline-flex;align-items:center;gap:var(--s-2);font-family:var(--font-mono);font-size:.8rem;color:var(--ink-3);margin-bottom:var(--s-4)}.card-tag-dot{width:6px;height:6px;border-radius:50%;display:inline-block}.card-tag-dot.zh{background:var(--accent-zh)}.card-tag-dot.en{background:var(--accent-en)}.card-tag-dot.future{background:var(--accent-gold)}.card-title-zh{font-family:var(--font-zh-display);font-size:1.8rem;line-height:1.2;margin:0 0 var(--s-2);color:var(--ink)}.card-title-en{font-size:1.1rem;font-weight:500;color:var(--ink-2);margin:0 0 var(--s-4)}.card-desc{font-size:.95rem;color:var(--ink-2);line-height:1.6;margin:0 0 var(--s-5)}.card-stats{display:flex;gap:var(--s-4);font-family:var(--font-mono);font-size:.8rem;color:var(--ink-3);flex-wrap:wrap}.card-stats span{color:var(--accent-zh);font-weight:600;margin-right:4px}.knowledge-card.en-card .card-stats span{color:var(--accent-en)}.knowledge-card.future-card{opacity:.7;border-style:dashed}.knowledge-card.future-card .card-stats span{color:var(--accent-gold)}.card-arrow{position:absolute;top:var(--s-6);right:var(--s-6);font-size:1.5rem;color:var(--ink-4);transition:transform .3s,color .3s}.knowledge-card:hover .card-arrow{transform:translate(4px,-4px);color:var(--accent-zh)}.future-card .card-arrow{display:none}.footer{padding:var(--s-12) 0;border-top:1px solid var(--glass-border);text-align:center;font-size:.9rem;color:var(--ink-3);margin-top:var(--s-20)}.footer-meta{font-family:var(--font-mono);font-size:.8rem;color:var(--ink-4);margin-top:var(--s-2)}.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.2,.8,.2,1),transform .7s cubic-bezier(.2,.8,.2,1)}.reveal.is-visible{opacity:1;transform:none}@media (max-width: 640px){.hero{padding:var(--s-16) 0 var(--s-12)}.hero-watermark{font-size:14rem}.section{padding:var(--s-10) 0}.card-grid{grid-template-columns:1fr}.nav-links{gap:var(--s-3)}.nav-link{font-size:.85rem}}.astro-route-announcer{position:absolute;left:0;top:0;clip:rect(0 0 0 0);clip-path:inset(50%);overflow:hidden;white-space:nowrap;width:1px;height:1px}