:root{--bg:#fafaf7;--surface:#fff;--ink:#17181c;--ink-soft:#2a2c33;--muted:#6f7378;--line:#e8e6df;--line-strong:#d8d5cc;--accent:#c8f169;--accent-ink:#14171a;--orange:#f5a25d;--blue:#6ba6e8;--green:#7fc98a;--purple:#b18cd9;--radius:14px;--radius-lg:20px;--shadow:0 1px 2px #14161a0a, 0 8px 24px #14161a0f;--shadow-lg:0 4px 8px #14161a0f, 0 16px 40px #14161a1a;--sans:"PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--mono:ui-monospace, "JetBrains Mono", "Cascadia Code", Consolas, 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12px;font-size:12.5px;font-weight:600;line-height:1.4;display:inline-flex}.chip.orange{color:#b45309;background:#fdeee0}.chip.blue{color:#1d4ed8;background:#e3f0fd}.chip.green{color:#15803d;background:#e4f6e8}.chip.purple{color:#7c3aed;background:#f1e7fb}.chip.ink{color:#374151;background:#eceef0}.projects-grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px;display:grid}.project-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;transition:transform .18s,box-shadow .18s,border-color .18s;position:relative}.project-card:hover{box-shadow:var(--shadow-lg);border-color:var(--line-strong);transform:translateY(-3px)}.project-card .status-dot{border-radius:50%;width:8px;height:8px;margin-right:6px;display:inline-block}.project-card h3{margin:14px 0 8px;font-size:19px}.project-card .desc{color:var(--muted);font-size:14.5px}.project-card .stack{flex-wrap:wrap;gap:6px;margin-top:16px;display:flex}.project-card .stack 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.15s}.comment-form textarea{resize:vertical;min-height:110px}.comment-form input:focus,.comment-form textarea:focus{border-color:var(--ink);box-shadow:0 0 0 3px #17181c14}.chat-shell{max-width:820px;margin:0 auto;padding:48px 24px 60px}.chat-intro{text-align:center;margin-bottom:30px}.chat-intro h1{margin-bottom:10px;font-size:34px}.chat-intro p{color:var(--muted)}.chat-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden}.chat-messages{flex-direction:column;gap:16px;height:420px;padding:24px;display:flex;overflow-y:auto}.msg{white-space:pre-wrap;word-break:break-word;border-radius:16px;max-width:82%;padding:12px 16px;font-size:14.5px;line-height:1.7}.msg.user{background:var(--ink);color:#fff;border-bottom-right-radius:4px;align-self:flex-end}.msg.assistant{background:var(--bg);border:1px solid var(--line);border-bottom-left-radius:4px;align-self:flex-start}.msg.typing:after{content:"▋";color:var(--muted);animation:1s step-end infinite blink}@keyframes blink{50%{opacity:0}}.chat-input{border-top:1px solid var(--line);background:var(--surface);gap:10px;padding:16px;display:flex}.chat-input textarea{resize:none;border:1px solid var(--line-strong);border-radius:12px;outline:none;flex:1;min-height:46px;max-height:140px;padding:12px 16px;font-family:inherit;font-size:14.5px;transition:border-color .15s}.chat-input textarea:focus{border-color:var(--ink)}.chat-input button{background:var(--accent);color:var(--accent-ink);border:0;border-radius:12px;padding:0 22px;font-size:15px;font-weight:700;transition:transform .15s}.chat-input button:hover:not(:disabled){transform:translateY(-1px)}.chat-input button:disabled{opacity:.5;cursor:not-allowed}.chat-suggestions{flex-wrap:wrap;justify-content:center;gap:8px;margin-top:14px;display:flex}.chat-suggestions button{border:1px solid var(--line-strong);color:var(--muted);background:0 0;border-radius:999px;padding:7px 14px;font-size:13px;transition:all .15s}.chat-suggestions button:hover{border-color:var(--ink);color:var(--ink)}.footer{border-top:1px solid var(--line);margin-top:40px;padding:40px 0}.footer-inner{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;display:flex}.footer .brand{font-size:15px}.footer p{color:var(--muted);font-size:13.5px}.skills{flex-wrap:wrap;gap:10px;display:flex}.skills span{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:9px 16px;font-size:14px;font-weight:500}@media (width<=720px){.nav-links{background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:4px;padding:12px 16px;display:none;position:fixed;inset:64px 0 auto}.nav-links.open{display:flex}.nav-link{text-align:center;padding:12px}.mobile-toggle{display:block}.hero{padding:56px 0 44px}.section{padding:44px 0}.posts-grid,.projects-grid{grid-template-columns:1fr}.section-head{flex-direction:column;align-items:flex-start;gap:10px}}