:root{--bg: #0f1320;--bg-2: #161b2e;--panel: #1c2238;--panel-2: #232a44;--text: #e8eaf2;--muted: #9aa3bf;--accent: #7c5cff;--accent-2: #20d4b8;--accent-3: #ff9f43;--danger: #ff5a7a;--border: rgba(255,255,255,.08);--glass: rgba(28, 34, 56, .6);--radius: 14px;--shadow-lg: 0 30px 60px -30px rgba(124, 92, 255, .45);--shadow-sm: 0 6px 20px -8px rgba(0,0,0,.5)}*{box-sizing:border-box}html,body{margin:0;padding:0}html{color-scheme:dark}body{background:radial-gradient(ellipse at 10% -10%,rgba(124,92,255,.18),transparent 60%),radial-gradient(ellipse at 90% 110%,rgba(32,212,184,.14),transparent 50%),var(--bg);color:var(--text);font-family:PingFang SC,Microsoft YaHei,Hiragino Sans GB,-apple-system,BlinkMacSystemFont,sans-serif;font-size:15px;line-height:1.65;min-height:100vh}a{color:var(--accent);text-decoration:none;transition:color 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(max-width: 800px){.site-nav{gap:0}.site-nav a{padding:6px 8px;font-size:13px}.footer-inner{grid-template-columns:1fr;gap:24px}.header-inner{padding:12px 14px}.container{padding:24px 14px}}.hero{position:relative;margin-bottom:50px;padding:70px 0 40px;text-align:center;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 30% 20%,rgba(124,92,255,.35),transparent 40%),radial-gradient(circle at 80% 80%,rgba(32,212,184,.25),transparent 40%);filter:blur(20px);z-index:-1}.hero h1{margin:0;font-size:clamp(34px,5vw,56px);font-weight:800;letter-spacing:-1px;background:linear-gradient(135deg,#fff,#c4b5fd 30%,#6ee7d9 70%,#fff);background-size:200% 200%;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:shimmer 6s linear infinite}@keyframes shimmer{0%,to{background-position:0% 50%}50%{background-position:100% 50%}}.hero p{margin:16px auto 28px;max-width:680px;font-size:17px;color:var(--muted)}.search-box{max-width:720px;margin:0 auto;position:relative}.search-box input{width:100%;background:#1c2238cc;border:1px solid var(--border);border-radius:16px;padding:18px 24px 18px 56px;color:var(--text);font-size:16px;font-family:inherit;outline:none;transition:all .25s;box-shadow:var(--shadow-sm)}.search-box input::placeholder{color:var(--muted)}.search-box input:focus{border-color:var(--accent);box-shadow:0 0 0 4px #7c5cff26,var(--shadow-sm)}.search-icon{position:absolute;left:22px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:18px}.search-hint{margin-top:14px;font-size:13px;color:var(--muted)}.search-hint kbd{background:var(--panel);border:1px solid var(--border);padding:2px 8px;border-radius:6px;font-size:12px;color:var(--text);font-family:JetBrains Mono,monospace}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:22px}.card{background:linear-gradient(180deg,var(--panel) 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.2s}.chip:hover{background:var(--accent);color:#fff;border-color:transparent}mark{background:linear-gradient(120deg,#7c5cff59,#ff9f4359);color:#fff;padding:0 4px;border-radius:4px}.empty-state{text-align:center;padding:80px 20px;color:var(--muted)}.empty-state h2{color:var(--text)}.search-results{max-width:880px;margin:36px auto 0}.search-result{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin-bottom:16px;transition:all .2s}.search-result:hover{border-color:var(--accent);background:var(--panel-2)}.search-result .title{font-size:17px;font-weight:700;color:var(--text);margin-bottom:6px}.search-result .summary{color:var(--muted);font-size:14px;line-height:1.6;margin-bottom:10px}.search-result .meta{display:flex;gap:8px;font-size:11px;color:var(--muted)}.ask-wrap{max-width:880px;margin:30px auto}.ask-card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:24px}.ask-input-row{display:flex;gap:12px}.ask-input-row textarea{flex:1;min-height:60px;background:var(--bg-2);border:1px solid var(--border);border-radius:12px;padding:14px 16px;color:var(--text);font-size:15px;font-family:inherit;resize:vertical}.ask-input-row textarea:focus{outline:none;border-color:var(--accent)}.btn-primary{background:linear-gradient(135deg,var(--accent),#5e3dff);color:#fff;border:none;padding:14px 24px;border-radius:12px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;align-self:stretch}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 8px 16px -8px #7c5cff99}.btn-primary:disabled{opacity:.6;cursor:not-allowed}.btn-primary svg{display:inline;vertical-align:middle;margin-right:6px}.answer-block{background:linear-gradient(180deg,#20d4b814,#1c223899);border:1px solid rgba(32,212,184,.3);border-radius:var(--radius);padding:26px;margin-top:20px;white-space:pre-wrap;line-height:1.8}.answer-block.streaming:after{content:"▍";animation:blink 1s infinite;color:var(--accent-2)}@keyframes blink{50%{opacity:0}}.cite-pill{display:inline-block;background:#7c5cff26;color:#c4b5fd;padding:2px 9px;border-radius:6px;font-size:12px;font-weight:600;margin-right:6px;cursor:pointer}.cite-pill:hover{background:var(--accent);color:#fff}.cite-section{margin-top:18px;padding-top:18px;border-top:1px dashed var(--border)}.cite-section h4{margin:0 0 10px;font-size:13px;color:var(--muted)}.cite-card{background:var(--bg-2);border:1px solid var(--border);border-radius:8px;padding:10px 14px;margin-bottom:8px;font-size:13px}.cite-card .t{color:var(--accent-2);font-weight:600}.cite-card .s{color:var(--muted)}.suggest-list{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.suggest-list .chip{background:#ffffff0a}.loading{display:inline-block;width:16px;height:16px;border:2px solid var(--accent);border-top-color:transparent;border-radius:50%;animation:spin .8s linear infinite;vertical-align:middle}@keyframes spin{to{transform:rotate(360deg)}}.card.cover-glow{background:radial-gradient(circle at 50% 0%,rgba(124,92,255,.25),transparent 60%)}