:root{
  --bg:#f7f6f2;--paper:#ffffff;--ink:#1d2127;--ink2:#4b5563;--muted:#8a919c;--line:#e7e4dc;
  --acc:#f38020;--acc2:#ff9f45;--accbg:#fff3e8;--teal:#0f9f8f;--dark:#0c1117;--dark2:#151c25;
  --code:#0f172a;--codeink:#e2e8f0;--r:14px;--sh:0 1px 2px rgba(16,24,40,.04),0 8px 24px rgba(16,24,40,.06);
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Noto Sans SC",sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",Menlo,Consolas,"Liberation Mono","Noto Sans Mono CJK SC",monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
.narrow{max-width:780px}
/* ---------- header ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(247,246,242,.82);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav .wrap{display:flex;align-items:center;height:64px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.3px}
.brand svg{width:30px;height:30px}
.brand small{display:block;font-weight:500;font-size:11px;color:var(--muted);letter-spacing:1.5px;line-height:1}
.brand b{display:block;font-size:17px;line-height:1.2}
.links{margin-left:auto;display:flex;gap:4px}
.links a{padding:8px 14px;border-radius:999px;color:var(--ink2);font-size:15px;transition:background .2s,color .2s}
.links a:hover{background:#efece4;color:var(--ink)}
.links a.on{background:var(--ink);color:#fff}
.burger{display:none;margin-left:auto;background:none;border:0;width:42px;height:42px;border-radius:10px;cursor:pointer}
.burger span{display:block;width:20px;height:2px;background:var(--ink);margin:5px auto;border-radius:2px;transition:transform .25s,opacity .2s}
/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 85% -10%,rgba(243,128,32,.28),transparent 60%),radial-gradient(900px 500px at -10% 110%,rgba(15,159,143,.22),transparent 60%),var(--dark);color:#f3f4f6}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding-top:84px;padding-bottom:88px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:2px;color:#fdba74;border:1px solid rgba(253,186,116,.35);padding:5px 12px;border-radius:999px}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.2)}
.hero h1{font-size:clamp(34px,5.4vw,58px);line-height:1.15;margin:20px 0 18px;letter-spacing:.5px}
.hero h1 .hl{background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:18px;color:#c7cdd6;max-width:560px;margin:0 0 30px}
.btns{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;border-radius:12px;font-weight:700;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s}
.btn.pri{background:var(--acc);color:#fff;box-shadow:0 8px 24px rgba(243,128,32,.35)}
.btn.pri:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(243,128,32,.45)}
.btn.ghost{border:1px solid rgba(255,255,255,.22);color:#f3f4f6}
.btn.ghost:hover{background:rgba(255,255,255,.08)}
.btn.line{border:1px solid var(--line);background:var(--paper)}
.btn.line:hover{border-color:var(--acc);color:var(--acc)}
.graph{position:relative;aspect-ratio:1.15/1;border-radius:22px;background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.1);box-shadow:inset 0 1px 0 rgba(255,255,255,.06)}
.graph svg{position:absolute;inset:0;width:100%;height:100%}
.graph .readout{position:absolute;left:18px;bottom:14px;font-family:var(--mono);font-size:13px;color:#9aa4b2}
.graph .readout b{color:#fdba74;font-weight:600}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stats div b{display:block;font-size:28px;color:#fff;font-family:var(--mono)}
.stats div span{font-size:13px;color:#9aa4b2}
/* ---------- sections ---------- */
section.blk{padding:72px 0}
.sec-h{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.sec-h h2{font-size:clamp(24px,3vw,32px);margin:0;line-height:1.3}
.sec-h p{margin:6px 0 0;color:var(--muted)}
.sec-h a{color:var(--acc);font-weight:700;white-space:nowrap}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{position:relative;display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s,border-color .25s;will-change:transform}
.card:hover{transform:translateY(-4px);box-shadow:0 2px 4px rgba(16,24,40,.05),0 18px 40px rgba(16,24,40,.10);border-color:#e0d6c8}
.card .thumb{aspect-ratio:1080/460;background:#eee center/cover no-repeat;border-bottom:1px solid var(--line)}
.card .body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:8px;flex:1}
.card h3{margin:0;font-size:18px;line-height:1.45}
.card p{margin:0;color:var(--ink2);font-size:14.5px;line-height:1.7}
.meta{display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:12.5px;color:var(--muted)}
.tag{display:inline-block;padding:2px 9px;border-radius:999px;background:var(--accbg);color:#c2410c;font-size:12px;font-weight:600}
.tag.t{background:#e6f6f4;color:#0f766e}
.card .more{margin-top:auto;padding-top:6px;color:var(--acc);font-weight:700;font-size:14px}
.proj-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:24px;background:var(--accbg)}
.next{background:var(--paper);border:1px dashed #e2c9ad;border-radius:var(--r);padding:26px 28px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.next div b{display:block;margin-bottom:4px}
.next div span{color:var(--ink2);font-size:14px}
/* ---------- page head ---------- */
.phead{padding:64px 0 28px}
.phead h1{font-size:clamp(28px,4vw,42px);margin:0 0 10px;line-height:1.3}
.phead p{color:var(--ink2);margin:0;max-width:720px}
.crumb{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumb a:hover{color:var(--acc)}
/* list */
.plist{display:flex;flex-direction:column;gap:16px;padding-bottom:80px}
.prow{display:grid;grid-template-columns:300px 1fr;gap:22px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);transition:transform .25s,box-shadow .25s}
.prow:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(16,24,40,.10)}
.prow .thumb{background:#0c1117 center/contain no-repeat;min-height:128px;align-self:stretch}
.prow .body{padding:20px 22px 20px 0;display:flex;flex-direction:column;gap:8px}
.prow h3{margin:0;font-size:19px;line-height:1.45}
.prow p{margin:0;color:var(--ink2);font-size:14.5px}
/* ---------- article ---------- */
.post{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:44px clamp(20px,5vw,56px);box-shadow:var(--sh);margin-bottom:60px}
.post h1{font-size:clamp(26px,3.6vw,36px);line-height:1.35;margin:0 0 14px}
.post .meta{margin-bottom:26px}
.prose{font-size:17px;line-height:1.9;color:#262b33}
.prose p{margin:0 0 18px}
.prose h2{font-size:23px;margin:42px 0 16px;padding-left:12px;border-left:4px solid var(--acc);line-height:1.4}
.prose h3{font-size:19px;margin:30px 0 12px}
.prose strong{color:#b45309}
.prose a{color:var(--acc);border-bottom:1px solid rgba(243,128,32,.35)}
.prose ul,.prose ol{padding-left:24px;margin:0 0 18px}
.prose li{margin:4px 0}
.prose blockquote{margin:0 0 18px;padding:12px 18px;border-radius:10px;background:var(--accbg);color:#7c2d12}
.prose blockquote p:last-child{margin:0}
.prose figure{margin:26px 0}
.prose figure img{border-radius:12px;border:1px solid var(--line);margin:0 auto}
.prose figcaption{text-align:center;font-size:13.5px;color:var(--muted);margin-top:8px}
.prose :not(pre)>code{font-family:var(--mono);font-size:.88em;background:var(--accbg);color:#c2410c;padding:1px 6px;border-radius:5px;word-break:break-all}
.tbl{overflow-x:auto;margin:0 0 20px;border:1px solid var(--line);border-radius:12px}
.prose table{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.6}
.prose th,.prose td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.prose th{background:#faf8f3;font-weight:700;white-space:nowrap}
.prose tr:last-child td{border-bottom:0}
/* ---------- code ---------- */
.code{position:relative;margin:0 0 22px;border-radius:12px;background:var(--code);overflow:hidden;box-shadow:0 6px 18px rgba(15,23,42,.18)}
.code .bar{display:flex;align-items:center;gap:10px;padding:8px 10px 8px 14px;background:#111c33;border-bottom:1px solid rgba(255,255,255,.06);font-family:var(--mono);font-size:12.5px;color:#94a3b8}
.code .bar .dots{display:flex;gap:6px}
.code .bar .dots i{width:10px;height:10px;border-radius:50%;background:#334155}
.code .bar .dots i:nth-child(1){background:#f87171}.code .bar .dots i:nth-child(2){background:#fbbf24}.code .bar .dots i:nth-child(3){background:#34d399}
.code .bar .fn{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.copy{appearance:none;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:#e2e8f0;font:600 12.5px var(--font);padding:5px 12px;border-radius:8px;cursor:pointer;transition:background .2s,border-color .2s,color .2s;white-space:nowrap}
.copy:hover{background:rgba(255,255,255,.14)}
.copy.ok{background:#16a34a;border-color:#16a34a;color:#fff}
.code pre{margin:0;padding:16px 18px;overflow:auto;max-height:none}
.code code{font-family:var(--mono);font-size:13.5px;line-height:1.7;color:var(--codeink);white-space:pre;tab-size:4}
details.long>summary{list-style:none;cursor:pointer;padding:10px 14px;background:#111c33;color:#fdba74;font-size:13px;border-top:1px solid rgba(255,255,255,.06)}
details.long>summary::-webkit-details-marker{display:none}
details.long[open]>summary .o{display:none}
details.long:not([open])>summary .c{display:none}
.code .peek{max-height:340px;overflow:hidden;position:relative}
.code .peek::after{content:"";position:absolute;left:0;right:0;bottom:0;height:80px;background:linear-gradient(transparent,var(--code))}
.code.open .peek{max-height:none}.code.open .peek::after{display:none}
.expand{display:block;width:100%;border:0;border-top:1px solid rgba(255,255,255,.06);background:#111c33;color:#fdba74;font:600 13px var(--font);padding:10px;cursor:pointer}
/* project page */
.pbox{display:grid;grid-template-columns:1fr 300px;gap:28px;align-items:start;padding-bottom:80px}
.side{position:sticky;top:84px;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--sh)}
.side h4{margin:0 0 10px;font-size:14px;color:var(--muted);letter-spacing:1px}
.side .btn{width:100%;justify-content:center;margin-bottom:14px}
.files{list-style:none;padding:0;margin:0;font-family:var(--mono);font-size:13px}
.files li a{display:flex;justify-content:space-between;gap:8px;padding:5px 8px;border-radius:7px;color:var(--ink2)}
.files li a:hover{background:#f3efe7;color:var(--ink)}
.files li a span{color:var(--muted)}
.fileh{display:flex;align-items:baseline;gap:10px;margin:34px 0 10px;scroll-margin-top:84px}
.fileh h3{margin:0;font-family:var(--mono);font-size:16px}
.fileh span{color:var(--muted);font-size:13px}
/* about */
.about-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:26px;padding-bottom:80px}
.panel{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px 28px;box-shadow:var(--sh)}
/* footer */
footer{background:var(--dark);color:#9aa4b2;padding:44px 0;font-size:14px}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer a:hover{color:#fff}
.totop{position:fixed;right:18px;bottom:18px;width:44px;height:44px;border-radius:50%;border:1px solid var(--line);background:var(--paper);box-shadow:var(--sh);cursor:pointer;font-size:18px;opacity:0;pointer-events:none;transition:opacity .25s;z-index:40}
.totop.show{opacity:1;pointer-events:auto}
.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:9px 16px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:60}
.toast.show{opacity:1}
/* motion: only hidden while GSAP is loading; if it fails, the class is removed */
.anim-pending .reveal{opacity:0}
.anim-pending .hero .reveal{opacity:0}
@media (prefers-reduced-motion:reduce){.anim-pending .reveal{opacity:1}*{transition:none!important;scroll-behavior:auto!important}}
/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;padding-top:56px;padding-bottom:60px}
  .graph{max-width:520px;width:100%}
  .grid{grid-template-columns:repeat(2,1fr)}
  .pbox,.about-grid{grid-template-columns:1fr}
  .side{position:static;order:-1}
  .next{grid-template-columns:1fr}
}
@media (max-width:680px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  .burger{display:block}
  .links{position:fixed;left:0;right:0;top:64px;flex-direction:column;gap:2px;padding:10px 16px 16px;background:rgba(247,246,242,.98);border-bottom:1px solid var(--line);transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .2s,transform .2s}
  .links a{padding:12px 14px;font-size:16px}
  .nav.open .links{opacity:1;transform:none;pointer-events:auto}
  .nav.open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav.open .burger span:nth-child(2){opacity:0}
  .nav.open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .grid,.grid.two{grid-template-columns:1fr}
  .prow{grid-template-columns:1fr}
  .prow .thumb{min-height:0;aspect-ratio:1080/460}
  .prow .body{padding:0 18px 18px}
  section.blk{padding:52px 0}
  .sec-h{flex-direction:column;align-items:flex-start}
  .post{padding:28px 18px;border-radius:14px}
  .prose{font-size:16px}
  .stats{gap:22px}
  .code code{font-size:12.5px}
}
.pbox>div,.about-grid>div,.post,.prose{min-width:0}
.code code{line-height:1.6}