:root{
    --bg:#ffffff;--bg2:#f6f6fb;--surface:#ffffff;--border:#ececf4;--ink:#17182a;--ink2:#54566b;--ink3:#8a8ca3;
    --indigo:#6A5AF9;--indigo-d:#5645E0;--indigo-weak:#efecff;--amber:#FFB020;--amber-ink:#8a5a00;
    --shadow:0 1px 2px rgba(20,20,40,.04),0 12px 40px rgba(60,50,160,.10);
    --sans:'Lexend',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  }
  @media(prefers-color-scheme:dark){:root{--bg:#0e0e16;--bg2:#14141f;--surface:#1b1b26;--border:#2b2b3c;--ink:#f3f3fb;--ink2:#b7bacd;--ink3:#7f829b;--indigo:#8b7dff;--indigo-d:#9e93ff;--indigo-weak:#221f3c;--shadow:0 1px 2px rgba(0,0,0,.3),0 16px 48px rgba(0,0,0,.5)}}
  :root[data-theme=light]{--bg:#fff;--bg2:#f6f6fb;--surface:#fff;--border:#ececf4;--ink:#17182a;--ink2:#54566b;--ink3:#8a8ca3;--indigo:#6A5AF9;--indigo-d:#5645E0;--indigo-weak:#efecff}
  :root[data-theme=dark]{--bg:#0e0e16;--bg2:#14141f;--surface:#1b1b26;--border:#2b2b3c;--ink:#f3f3fb;--ink2:#b7bacd;--ink3:#7f829b;--indigo:#8b7dff;--indigo-d:#9e93ff;--indigo-weak:#221f3c}
  *{box-sizing:border-box}
  body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;line-height:1.5}
  a{color:inherit;text-decoration:none}
  .wrap{max-width:1080px;margin:0 auto;padding:0 22px}
  nav{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 82%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
  .nav-in{display:flex;align-items:center;gap:16px;height:62px}
  .brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:19px;letter-spacing:-.4px}
  .brand .dot{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--indigo),var(--indigo-d));display:grid;place-items:center;font-size:17px}
  .nav-links{display:flex;gap:22px;margin-inline-start:auto;font-size:14px;color:var(--ink2);font-weight:500}
  .nav-links a:hover{color:var(--ink)}
  @media(max-width:760px){.nav-links{display:none}}
  .btn{display:inline-flex;align-items:center;gap:8px;font-weight:650;font-size:14px;padding:10px 18px;border-radius:12px;cursor:pointer;border:none;font-family:inherit;transition:.15s}
  .btn.primary{background:var(--indigo);color:#fff;box-shadow:0 6px 18px rgba(106,90,249,.32)}
  .btn.primary:hover{background:var(--indigo-d)}
  .btn.ghost{background:var(--surface);color:var(--ink);border:1px solid var(--border)}
  .langsel{font-family:inherit;font-size:13px;font-weight:600;color:var(--ink2);background:var(--surface);border:1px solid var(--border);border-radius:9px;padding:7px 8px;cursor:pointer}
  .hero{padding:70px 0 40px;display:grid;grid-template-columns:1.15fr .85fr;gap:32px;align-items:center}
  @media(max-width:820px){.hero{grid-template-columns:1fr;text-align:center;padding:44px 0 20px}}
  .eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:700;letter-spacing:.3px;color:var(--indigo);background:var(--indigo-weak);padding:6px 13px;border-radius:999px}
  h1{font-size:clamp(34px,5.4vw,54px);line-height:1.05;letter-spacing:-1.4px;font-weight:800;margin:18px 0 0;text-wrap:balance}
  h1 .g{background:linear-gradient(120deg,var(--indigo),var(--amber));-webkit-background-clip:text;background-clip:text;color:transparent}
  .sub{font-size:17px;color:var(--ink2);margin:16px 0 0;max-width:40ch}
  @media(max-width:820px){.sub{margin-inline:auto}}
  .cta{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
  @media(max-width:820px){.cta{justify-content:center}}
  .hero-art{position:relative;display:grid;place-items:center}
  .blob{position:absolute;inset:-10% 0 0 0;background:radial-gradient(60% 55% at 55% 42%,rgba(106,90,249,.28),transparent 70%),radial-gradient(45% 40% at 30% 75%,rgba(255,176,32,.22),transparent 70%);filter:blur(6px)}
  .hero-art img{position:relative;width:min(300px,72vw);height:auto;filter:drop-shadow(0 24px 40px rgba(60,40,160,.28))}
  .flow{margin:22px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;font-weight:600}
  @media(max-width:820px){.flow{justify-content:center}}
  .chip{padding:6px 12px;border-radius:999px;border:1px solid var(--border);background:var(--surface);color:var(--ink2)}
  .chip.in{border-color:color-mix(in srgb,var(--indigo) 30%,var(--border));color:var(--indigo)}
  .chip.out{border-color:color-mix(in srgb,var(--amber) 45%,var(--border));color:var(--amber-ink);background:color-mix(in srgb,var(--amber) 10%,var(--surface))}
  .arrow{color:var(--ink3);font-weight:800}
  section{padding:64px 0}
  .kicker{font-size:12.5px;font-weight:750;letter-spacing:.6px;text-transform:uppercase;color:var(--indigo)}
  h2{font-size:clamp(26px,3.6vw,36px);letter-spacing:-.8px;font-weight:800;margin:8px 0 0;text-wrap:balance}
  .lead{font-size:16px;color:var(--ink2);margin:12px 0 0;max-width:60ch}
  .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}
  @media(max-width:820px){.grid{grid-template-columns:1fr 1fr}}
  @media(max-width:520px){.grid{grid-template-columns:1fr}}
  .card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}
  .card .ic{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;font-size:22px;background:var(--indigo-weak);margin-bottom:12px}
  .card h3{margin:0 0 6px;font-size:16px;font-weight:750}
  .card p{margin:0;font-size:13.5px;color:var(--ink2);line-height:1.5}
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px;counter-reset:s}
  @media(max-width:720px){.steps{grid-template-columns:1fr}}
  .step{position:relative;padding:22px 20px;border-radius:16px;border:1px dashed var(--border)}
  .step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;inset-inline-start:20px;width:28px;height:28px;border-radius:8px;background:var(--indigo);color:#fff;display:grid;place-items:center;font-weight:800;font-size:14px}
  .step h3{margin:8px 0 5px;font-size:15px;font-weight:750}.step p{margin:0;font-size:13.5px;color:var(--ink2)}
  .disc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:30px}
  @media(max-width:900px){.disc-grid{grid-template-columns:repeat(3,1fr)}}
  @media(max-width:640px){.disc-grid{grid-template-columns:repeat(2,1fr)}}
  .disc-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);transition:.15s}
  .disc-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--indigo) 40%,var(--border))}
  .disc-thumb{display:block;aspect-ratio:3/4;background:var(--indigo-weak) center/cover no-repeat}
  .disc-body{padding:11px 12px}
  .disc-title{font-size:13.5px;font-weight:650;line-height:1.3;margin:0 0 7px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .disc-meta{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:11px;color:var(--ink3)}
  .disc-empty{color:var(--ink3);font-size:14px;margin-top:20px}
  .band{margin:20px 0 0;background:linear-gradient(120deg,var(--indigo),var(--indigo-d));border-radius:22px;padding:40px;text-align:center;color:#fff}
  .band h2{color:#fff}.band .lead{color:rgba(255,255,255,.85);margin-inline:auto}
  .band .btn.primary{background:#fff;color:var(--indigo-d);box-shadow:none;margin-top:22px}
  footer{border-top:1px solid var(--border);padding:34px 0;margin-top:50px;color:var(--ink3);font-size:13px}
  .foot-in{display:flex;flex-wrap:wrap;gap:16px 26px;align-items:center}
  .foot-links{display:flex;gap:20px;flex-wrap:wrap;margin-inline-start:auto}
  .foot-links a:hover{color:var(--ink)}
  .themebtn{background:var(--surface);border:1px solid var(--border);color:var(--ink);width:34px;height:34px;border-radius:9px;cursor:pointer}
  .brand .dot{overflow:hidden}
  .brand .dot img{width:100%;height:100%;object-fit:cover}
  .step .mascot{position:absolute;top:14px;inset-inline-end:12px;width:50px;height:50px;filter:drop-shadow(0 6px 12px rgba(60,40,160,.18));pointer-events:none}
  .step h3{max-width:calc(100% - 54px)}
  .band .band-mascot{display:block;width:92px;height:92px;margin:0 auto 4px;filter:drop-shadow(0 12px 22px rgba(0,0,0,.28))}
  .disc-empty{grid-column:1/-1;text-align:center;color:var(--ink3);padding:26px 0}
  .disc-empty .mascot{display:block;width:88px;height:88px;margin:0 auto 8px;opacity:.9}

/* ---------- Blog ---------- */
.blog-hero{padding:56px 0 8px}
.blog-hero .kicker{display:inline-flex;align-items:center;gap:8px}
.blog-hero h1{font-size:clamp(30px,4.6vw,46px);letter-spacing:-1px;margin:10px 0 0}
.blog-hero .lead{max-width:56ch}
.post-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:36px 0 10px}
@media(max-width:720px){.post-list{grid-template-columns:1fr}}
.post-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);transition:.15s}
.post-card:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--indigo) 40%,var(--border))}
.post-card .top{display:flex;align-items:center;gap:14px;padding:20px 20px 0}
.post-card .m{width:56px;height:56px;flex:none;filter:drop-shadow(0 6px 12px rgba(60,40,160,.18))}
.post-card .cat{font-size:11.5px;font-weight:750;letter-spacing:.5px;text-transform:uppercase;color:var(--indigo)}
.post-card h2{font-size:19px;letter-spacing:-.4px;margin:4px 0 0;line-height:1.25}
.post-card .body{padding:12px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-card p{margin:0;font-size:14px;color:var(--ink2);line-height:1.55}
.post-card .meta{margin-top:auto;display:flex;gap:10px;align-items:center;font-size:12.5px;color:var(--ink3);font-weight:600}
.post-card .go{color:var(--indigo);font-weight:700;font-size:13.5px}
/* Article */
.article{max-width:720px;margin:0 auto}
.article .back{display:inline-block;margin:30px 0 0;font-size:13.5px;font-weight:650;color:var(--ink2)}
.article .back:hover{color:var(--ink)}
.article header{padding:14px 0 6px}
.article .cat{font-size:12px;font-weight:750;letter-spacing:.5px;text-transform:uppercase;color:var(--indigo)}
.article h1{font-size:clamp(28px,4.4vw,42px);letter-spacing:-1px;line-height:1.1;margin:10px 0 0;text-wrap:balance}
.article .dek{font-size:18px;color:var(--ink2);margin:14px 0 0;line-height:1.5}
.article .byline{display:flex;align-items:center;gap:12px;margin:20px 0 0;padding-bottom:22px;border-bottom:1px solid var(--border);font-size:13px;color:var(--ink3);font-weight:600}
.article .byline img{width:40px;height:40px;border-radius:10px}
.article .cover{margin:26px 0 6px;background:linear-gradient(135deg,var(--indigo-weak),color-mix(in srgb,var(--amber) 16%,var(--surface)));border-radius:18px;display:grid;place-items:center;padding:28px}
.article .cover img{width:180px;height:180px;filter:drop-shadow(0 16px 30px rgba(60,40,160,.24))}
.prose{font-size:17px;line-height:1.72;color:var(--ink)}
.prose>p{margin:20px 0 0}
.prose h2{font-size:25px;letter-spacing:-.5px;margin:38px 0 0}
.prose h3{font-size:19px;margin:28px 0 0}
.prose ul,.prose ol{margin:16px 0 0;padding-inline-start:24px}
.prose li{margin:8px 0 0}
.prose li::marker{color:var(--indigo)}
.prose a{color:var(--indigo);font-weight:600;text-decoration:underline;text-underline-offset:2px}
.prose blockquote{margin:24px 0 0;padding:4px 0 4px 18px;border-inline-start:3px solid var(--indigo);color:var(--ink2);font-style:italic}
.prose .note{margin:24px 0 0;background:var(--indigo-weak);border:1px solid color-mix(in srgb,var(--indigo) 24%,var(--border));border-radius:14px;padding:16px 18px;font-size:15.5px;color:var(--ink)}
.prose strong{font-weight:700}
.post-cta{margin:40px auto 0;max-width:720px}
.post-cta .band{margin-top:0}
.toc{margin:22px 0 0;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:16px 18px}
.toc .t{font-size:12px;font-weight:750;letter-spacing:.5px;text-transform:uppercase;color:var(--ink3)}
.toc ul{margin:10px 0 0;padding-inline-start:18px}
.toc li{margin:6px 0 0}
.toc a{color:var(--ink2);font-size:14.5px;font-weight:500}
.toc a:hover{color:var(--indigo)}