:root{
  --ink:#12263A; --ink-2:#0B1B2B; --paper:#FAFAF7; --card:#FFFFFF;
  --line:#E7E4DC; --line-2:#D8D4C9; --text:#1B2530; --muted:#5C6672; --faint:#8A929C;
  --amber:#C9973B; --amber-bg:#FAEEDA; --amber-tx:#854F0B;
  --blue-tx:#B5D4F4; --radius:12px; --maxw:960px;
  --serif:"Newsreader",Georgia,"Times New Roman",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font-family:var(--sans);font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* top bar */
.nav{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(8px);border-bottom:.5px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-weight:600;letter-spacing:-.01em}
.brand .mark{width:28px;height:28px;border-radius:7px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:15px}
.brand .dim{color:var(--faint);font-weight:400}
.nav-links{display:flex;align-items:center;gap:20px}
.nav-links a{font-size:14px;color:var(--muted);text-decoration:none}
.nav-links a:hover{color:var(--text)}
.lang{display:inline-flex;border:.5px solid var(--line-2);border-radius:999px;overflow:hidden;font-size:12px}
.lang a{padding:5px 11px;text-decoration:none;color:var(--muted)}
.lang a.on{background:var(--ink);color:#fff}
@media(max-width:600px){.nav-links .hide-sm{display:none}}

/* hero */
.hero{text-align:center;padding:56px 0 30px}
.eyebrow{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--amber-tx);background:var(--amber-bg);border-radius:999px;padding:5px 13px;margin-bottom:22px}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(28px,5vw,40px);line-height:1.15;letter-spacing:-.02em;margin:0 auto 14px;max-width:16em}
.hero .lede{font-size:16px;color:var(--muted);max-width:38em;margin:0 auto 28px}

/* disclaimer banner */
.disc-bar{background:var(--ink);color:var(--blue-tx)}
.disc-bar .wrap{display:flex;align-items:center;justify-content:center;gap:9px;padding:11px 20px;text-align:center;font-size:13px;line-height:1.4}
.disc-bar i{color:#FAC775;flex:none}

/* sections */
section{padding:34px 0}
.sec-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.sec-head h2{font-size:18px;font-weight:600;margin:0}
.sec-head a{font-size:13px;color:var(--muted);text-decoration:none}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}
.card{background:var(--card);border:.5px solid var(--line);border-radius:var(--radius);padding:16px 17px;text-decoration:none;color:inherit;transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--line-2);transform:translateY(-1px)}
.card .ic{color:var(--ink);font-size:20px}
.card h3{font-size:15px;font-weight:600;margin:10px 0 4px;line-height:1.35}
.card .meta{font-size:12px;color:var(--faint)}

.pills{display:flex;flex-wrap:wrap;gap:7px;align-items:center;justify-content:center}
.pill{font-size:12px;color:var(--muted);background:#F1EFE8;border-radius:999px;padding:5px 12px}

.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:18px}
.step .n{width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600}
.step h3{font-size:15px;margin:10px 0 4px}
.step p{font-size:14px;color:var(--muted);margin:0}

/* footer */
footer{border-top:.5px solid var(--line);background:#fff;margin-top:20px}
footer .wrap{padding:30px 20px}
footer .cols{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between}
footer a{color:var(--muted);text-decoration:none;font-size:14px;display:block;margin:6px 0}
footer a:hover{color:var(--text)}
footer .fine{font-size:12px;color:var(--faint);margin-top:22px;line-height:1.6;max-width:60em}

/* article */
article.doc{max-width:720px;margin:0 auto;padding:36px 20px 20px}
article.doc h1{font-family:var(--serif);font-weight:500;font-size:clamp(26px,4vw,34px);line-height:1.2;letter-spacing:-.02em;margin:0 0 10px}
article.doc .updated{font-size:13px;color:var(--faint);margin-bottom:24px}
article.doc h2{font-size:20px;font-weight:600;margin:30px 0 10px}
article.doc h3{font-size:17px;font-weight:600;margin:22px 0 8px}
article.doc p,article.doc li{font-size:16.5px;line-height:1.75}
article.doc a{color:var(--ink);text-underline-offset:2px}
.callout{background:var(--amber-bg);border-radius:var(--radius);padding:14px 16px;font-size:14.5px;color:#5a4413;margin:22px 0}
.faq dt{font-weight:600;margin-top:16px}
.faq dd{margin:4px 0 0;color:var(--muted)}
.article-cta{background:var(--ink);color:#fff;border-radius:16px;padding:22px 22px;margin:30px 0;text-align:center}
.article-cta p{margin:0 0 12px;color:var(--blue-tx);font-size:15px}
.article-cta button{border:0;background:#fff;color:var(--ink);font-weight:600;border-radius:10px;padding:10px 18px;font-size:14px;cursor:pointer}

/* ===== assistant widget ===== */
.al-panel{text-align:left}
.al-panel.al-inline{background:var(--card);border:.5px solid var(--line-2);border-radius:16px;box-shadow:0 2px 10px rgba(15,27,43,.06);overflow:hidden}
.al-thread{padding:16px 16px 6px;max-height:340px;overflow-y:auto;display:flex;flex-direction:column;gap:14px}
.al-panel:not(.al-inline) .al-thread{max-height:none;flex:1}
.al-row{display:flex;flex-direction:column}
.al-row.al-user{align-items:flex-end}
.al-bhead{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:600;color:var(--muted);margin-bottom:5px}
.al-avatar{width:20px;height:20px;border-radius:5px;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px}
.al-bubble{font-size:14.5px;line-height:1.6;max-width:88%}
.al-user .al-bubble{background:#EEF2F6;border-radius:12px;padding:9px 13px}
.al-disc{font-size:11.5px;color:var(--faint);margin-top:7px;padding-top:7px;border-top:.5px solid var(--line);max-width:88%}
.al-form{border-top:.5px solid var(--line);padding:12px 14px}
.al-panel:not(.al-inline) .al-form{border-top:.5px solid var(--line)}
.al-input{width:100%;border:0;resize:none;outline:none;background:transparent;font-family:inherit;font-size:15px;line-height:1.55;color:var(--text);max-height:160px;overflow-y:auto}
.al-formbar{display:flex;align-items:center;justify-content:space-between;margin-top:8px;gap:10px}
.al-hint{font-size:11.5px;color:var(--faint)}
.al-sendbtn{width:34px;height:34px;flex:none;border:0;border-radius:9px;background:var(--ink);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:17px}
.al-sendbtn:active{transform:scale(.96)}

/* launcher bubble + online dot */
.al-launcher{position:fixed;right:22px;bottom:22px;z-index:60;width:56px;height:56px;border-radius:50%;border:0;background:var(--ink);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:24px;box-shadow:0 6px 20px rgba(15,27,43,.28)}
.al-dot{width:12px;height:12px;border-radius:50%;background:#2FBF71;display:inline-block;box-shadow:0 0 0 0 rgba(47,191,113,.6);animation:alpulse 2s infinite}
.al-launcher .al-dot{position:absolute;top:9px;left:9px;width:11px;height:11px;border:2px solid var(--ink)}
@keyframes alpulse{0%{box-shadow:0 0 0 0 rgba(47,191,113,.55)}70%{box-shadow:0 0 0 7px rgba(47,191,113,0)}100%{box-shadow:0 0 0 0 rgba(47,191,113,0)}}
.al-pop{position:fixed;right:22px;bottom:22px;z-index:61;width:380px;max-width:calc(100vw - 32px);height:560px;max-height:calc(100dvh - 40px);background:var(--card);border:.5px solid var(--line-2);border-radius:16px;box-shadow:0 16px 46px rgba(15,27,43,.24);display:flex;flex-direction:column;overflow:hidden}
.al-pop .al-panel{display:flex;flex-direction:column;flex:1;min-height:0}
.al-pophead{display:flex;align-items:center;justify-content:space-between;padding:13px 15px;border-bottom:.5px solid var(--line);font-weight:600;font-size:14px}
.al-pophead .al-dot{margin-right:5px;vertical-align:middle}
.al-close{border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:18px}
@media(max-width:480px){.al-pop{right:0;bottom:0;width:100vw;height:100dvh;max-height:100dvh;border-radius:0}}