/* paotuisg.com guide pages + 404 (seo/build_seo.py). Same tokens and type as the v2 homepage. */
:root{
  --ink:#08102b;--navy:#1a2785;--blue:#2e40c0;--sky:#4a62e0;--sky2:#6b7fe8;--flash:#f5c842;
  --fog:#f3f5ff;--mist:#e7ebfd;--line:#dfe3f3;--muted:#4c5675;--text-d:rgba(255,255,255,.74);--text-d2:rgba(255,255,255,.52);
  --f-display:"Archivo","PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --gut:clamp(16px,4.2vw,48px);--r:16px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:84px}
body{margin:0;font-family:var(--f-display);font-size:17px;line-height:1.65;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;height:auto}
a{color:var(--blue);text-underline-offset:3px}
a:hover{color:var(--navy)}
:focus-visible{outline:2px solid var(--sky);outline-offset:3px}
.mono{font-family:var(--f-mono);font-size:.92em;background:var(--fog);border-radius:6px;padding:.05em .4em;white-space:nowrap}
.g-wrap{max-width:1180px;margin:0 auto;padding:0 var(--gut)}
.g-skip{position:fixed;left:16px;top:-60px;z-index:99;background:var(--flash);color:var(--ink);padding:10px 16px;border-radius:10px;font-weight:700}
.g-skip:focus{top:12px}

/* header */
.g-nv{position:sticky;top:0;z-index:50;background:rgba(8,16,43,.94);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid rgba(197,204,245,.12)}
.g-nv-in{display:flex;flex-wrap:wrap;align-items:center;gap:20px;min-height:68px}
.g-brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-weight:800;font-stretch:110%;letter-spacing:-.01em;font-size:1.05rem;flex:none}
.g-brand img{width:40px;height:auto;background:#fff;border-radius:9px;padding:3px}
.g-links{display:flex;gap:4px;margin-left:auto}
.g-links a{color:var(--text-d);text-decoration:none;font-size:.92rem;font-weight:500;padding:8px 12px;border-radius:999px}
.g-links a:hover{color:#fff;background:rgba(255,255,255,.07)}
.g-lang{border:1px solid rgba(197,204,245,.25)}
.g-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:999px;font-weight:700;font-size:.95rem;text-decoration:none;transition:transform .2s,background .2s,color .2s;white-space:nowrap}
.g-btn:hover{transform:translateY(-1px)}
.g-btn-wa{background:var(--flash);color:var(--ink)}
.g-btn-wa:hover{background:#ffd558;color:var(--ink)}
.g-btn-ghost{color:#fff;border:1px solid rgba(197,204,245,.3)}
.g-btn-ghost:hover{color:#fff;background:rgba(255,255,255,.07)}
.g-nv-cta{min-height:40px;padding:0 16px;font-size:.88rem}
@media (max-width:700px){
  .g-nv-in{gap:10px 12px;padding-top:12px}
  .g-nv-cta{margin-left:auto}
  .g-links{order:3;width:100%;margin:0 0 0 -12px;padding-bottom:6px;overflow-x:auto;scrollbar-width:none;flex-wrap:nowrap}
  .g-links::-webkit-scrollbar{display:none}
  .g-links a{white-space:nowrap;padding:6px 12px;font-size:.88rem}
  html{scroll-padding-top:110px}
}
@media (max-width:400px){.g-brand span{display:none}}

/* hero */
.g-hero{position:relative;background:var(--ink);color:#fff;padding:36px 0 44px;overflow:hidden}
.g-hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(60% 80% at 85% 0%,rgba(74,98,224,.35),transparent 60%),
  linear-gradient(rgba(197,204,245,.06) 1px,transparent 1px) 0 0/48px 48px,
  linear-gradient(90deg,rgba(197,204,245,.06) 1px,transparent 1px) 0 0/48px 48px;pointer-events:none}
.g-hero .g-wrap{position:relative}
.g-crumbs{display:flex;flex-wrap:wrap;gap:8px;font-family:var(--f-mono);font-size:.74rem;letter-spacing:.04em;color:var(--text-d2);margin-bottom:28px}
.g-crumbs a{color:var(--text-d);text-decoration:none}
.g-crumbs a:hover{color:#fff}
.g-eyebrow{font-family:var(--f-mono);font-size:.74rem;letter-spacing:.16em;text-transform:uppercase;color:var(--sky2);margin:0 0 14px}
.g-hero h1{font-weight:780;font-stretch:112%;font-size:clamp(2.1rem,5vw,3.9rem);line-height:1;letter-spacing:-.035em;margin:0;max-width:17ch;text-wrap:balance}
html[lang^="zh"] .g-hero h1{letter-spacing:-.01em;line-height:1.12;font-stretch:100%}
.g-lede{font-size:clamp(1.02rem,1.6vw,1.18rem);color:var(--text-d);max-width:60ch;margin:20px 0 0}
.g-ctas{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
/* short answer (hero) */
.g-short{margin:36px 0 0;max-width:760px;border:1px solid rgba(197,204,245,.2);border-radius:var(--r);background:rgba(255,255,255,.04);padding:18px 22px 10px}
.g-short h2{margin:0 0 6px;font-family:var(--f-mono);font-size:.72rem;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--flash)}
.g-short ul{list-style:none;margin:0;padding:0}
.g-short li{display:grid;grid-template-columns:minmax(0,11.5rem) minmax(0,1fr);gap:4px 16px;padding:10px 0;border-top:1px solid rgba(197,204,245,.14)}
.g-short li:first-child{border-top:0}
.g-short-k{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--text-d2);padding-top:.25em}
.g-short-v{color:var(--text-d)}
.g-short-v b{color:#fff;font-weight:700}
@media (max-width:560px){.g-short{padding:14px 16px 6px}.g-short li{grid-template-columns:1fr;gap:2px}}
/* contents list + mid-page prompts (article) */
.g-toc{margin:14px 0 8px;padding:16px 20px;border:1px solid var(--line);border-radius:var(--r);background:var(--fog)}
.g-body nav.g-toc h2{margin:0 0 8px;font-family:var(--f-mono);font-size:.72rem;font-weight:500;font-stretch:100%;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.g-toc ol{margin:0;padding:0 0 0 1.3em;columns:2;column-gap:32px}
.g-toc li{margin:0;padding:3px 0;break-inside:avoid}
.g-toc a{color:var(--navy);font-weight:600;text-decoration:none}
.g-toc a:hover{text-decoration:underline}
@media (max-width:560px){.g-toc ol{columns:1}}
.g-mid{display:flex;align-items:center;justify-content:space-between;gap:14px 20px;flex-wrap:wrap;margin:36px 0 0;padding:14px 18px;border:1px solid var(--line);border-left:3px solid var(--flash);border-radius:0 var(--r) var(--r) 0;background:var(--fog)}
.g-body .g-mid p{margin:0;font-weight:700;color:var(--ink)}
.g-btn-line{color:var(--navy);border:1px solid var(--navy);background:#fff}
.g-btn-line:hover{background:var(--mist);color:var(--navy)}
.g-body [id]{scroll-margin-top:84px}
html[lang^="zh"] .g-hero h1{max-width:22em;word-break:keep-all;overflow-wrap:anywhere}
@media (max-width:560px){.mono{white-space:normal;overflow-wrap:anywhere}}
html[lang^="zh"] .g-short-k,html[lang^="zh"] .g-short h2,html[lang^="zh"] .g-toc h2{letter-spacing:.02em}

/* body */
.g-body{max-width:820px;padding-top:28px;padding-bottom:56px}
.g-updated{font-family:var(--f-mono);font-size:.75rem;color:var(--muted);margin:0 0 8px}
.g-body h2{font-weight:760;font-stretch:108%;font-size:clamp(1.45rem,2.6vw,1.9rem);line-height:1.15;letter-spacing:-.02em;margin:52px 0 14px;color:var(--ink);text-wrap:balance}
.g-body h2:first-of-type{margin-top:28px}
.g-body p,.g-body li{color:#232b45}
.g-body p{margin:0 0 14px}
.g-body b{color:var(--ink)}
ul.plain,ol.plain{padding-left:1.2em;margin:0 0 16px}
ul.plain li,ol.plain li{margin:0 0 8px;padding-left:4px}
ul.plain li::marker{color:var(--sky)}
ol.plain li::marker{color:var(--sky);font-family:var(--f-mono);font-weight:600}
ol.steps{list-style:none;counter-reset:s;padding:0;margin:0 0 18px}
ol.steps>li{counter-increment:s;position:relative;padding:14px 0 14px 54px;border-top:1px solid var(--line)}
ol.steps>li:last-child{border-bottom:1px solid var(--line)}
ol.steps>li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:14px;width:38px;height:38px;border-radius:12px;background:var(--fog);color:var(--navy);font-family:var(--f-mono);font-weight:600;font-size:.82rem;display:flex;align-items:center;justify-content:center}
ul.links{list-style:none;padding:0;margin:0 0 16px;display:flex;flex-wrap:wrap;gap:10px}
ul.links a{display:inline-flex;padding:9px 14px;border:1px solid var(--line);border-radius:999px;text-decoration:none;font-weight:600;font-size:.93rem;color:var(--navy)}
ul.links a:hover{border-color:var(--sky);background:var(--fog)}
.note{background:var(--fog);border-left:3px solid var(--flash);border-radius:0 12px 12px 0;padding:14px 18px;font-size:.96rem;margin:18px 0}
.example{border:1px solid var(--line);border-radius:var(--r);padding:16px 20px;margin:18px 0;background:linear-gradient(180deg,#fff,var(--fog))}
.example p{margin:0}
.example .ex-h{font-family:var(--f-mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--sky);margin-bottom:6px}

/* tables */
.tbl{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:16px 0 18px;border:1px solid var(--line);border-radius:var(--r)}
.tbl table{width:100%;border-collapse:collapse;font-size:.95rem}
.tbl.narrow{max-width:460px}
.tbl th,.tbl td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl tbody tr:last-child>*{border-bottom:0}
.tbl thead th{background:var(--fog);font-family:var(--f-mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:500}
.tbl tbody th{font-weight:700;color:var(--ink);white-space:nowrap}
.num{font-family:var(--f-mono);font-weight:500;font-feature-settings:"tnum" 1;white-space:nowrap}

/* screenshot */
.shot{margin:20px 0 24px;display:flex;gap:18px;align-items:flex-end}
.shot img{width:min(260px,62vw);border-radius:22px;border:1px solid var(--line);box-shadow:0 2px 4px rgba(8,16,43,.05),0 22px 48px -24px rgba(8,16,43,.32)}
.shot figcaption{font-size:.88rem;color:var(--muted);max-width:30ch}
@media (max-width:560px){.shot{flex-direction:column;align-items:flex-start}}

/* FAQ */
.g-faq{margin-top:56px}
.g-q{border-top:1px solid var(--line)}
.g-q:last-child{border-bottom:1px solid var(--line)}
.g-q summary{cursor:pointer;list-style:none;padding:16px 40px 16px 0;font-weight:700;position:relative;color:var(--ink)}
.g-q summary::-webkit-details-marker{display:none}
.g-q summary::after{content:"";position:absolute;right:6px;top:50%;width:10px;height:10px;border-right:2px solid var(--sky);border-bottom:2px solid var(--sky);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.g-q[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.g-a{padding:0 0 14px}
.g-a p{margin:0}

/* closing band + related */
.g-band{background:var(--navy);color:#fff}
.g-band-in{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:40px;padding-bottom:40px;flex-wrap:wrap}
.g-band h2{margin:0 0 6px;font-weight:760;font-stretch:108%;font-size:1.6rem;letter-spacing:-.02em}
.g-band p{margin:0;color:var(--text-d);max-width:56ch}
.g-related{padding-top:48px;padding-bottom:64px}
.g-related h2{font-weight:760;font-stretch:108%;font-size:1.4rem;margin:0 0 16px}
.g-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.g-card{display:flex;flex-direction:column;gap:8px;padding:18px;border:1px solid var(--line);border-radius:var(--r);text-decoration:none;color:var(--ink);transition:border-color .2s,transform .2s,box-shadow .2s}
.g-card:hover{border-color:var(--sky);transform:translateY(-2px);box-shadow:0 18px 40px -26px rgba(8,16,43,.45);color:var(--ink)}
.g-card-k{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.12em;text-transform:uppercase;color:var(--sky)}
.g-card-t{font-weight:700;line-height:1.3}

/* footer */
.g-ft{background:var(--ink);color:var(--text-d)}
.g-ft-in{display:grid;grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,1fr));gap:32px;padding-top:52px;padding-bottom:36px}
.g-ft-brand p{font-size:.92rem;margin:14px 0 0;max-width:34ch}
.g-ft-h{font-family:var(--f-mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--sky2);margin:0 0 14px}
.g-ft-col{display:flex;flex-direction:column;align-items:flex-start;gap:9px}
.g-ft-col a{color:var(--text-d);text-decoration:none;font-size:.92rem}
.g-ft-col a:hover{color:#fff}
.g-ft-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;padding-top:18px;padding-bottom:26px;border-top:1px solid rgba(197,204,245,.12);font-size:.8rem;color:var(--text-d2)}
@media (max-width:860px){.g-ft-in{grid-template-columns:1fr 1fr}.g-ft-brand{grid-column:1/-1}}
@media (max-width:420px){.g-ft-in{grid-template-columns:1fr}}

/* calculators (assets/guides-calc.js) */
.g-calc{margin:8px 0 28px;padding:20px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(180deg,var(--fog),#fff 60%);box-shadow:0 22px 48px -32px rgba(8,16,43,.35)}
.g-calc[hidden]{display:none}
.g-calc-head{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px}
.g-calc-k{margin:0;font-family:var(--f-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--navy);font-weight:600}
.g-calc-unit{display:flex;align-items:center;gap:8px;font-size:.88rem;color:var(--muted)}
.g-calc select,.g-calc input{font:inherit;font-size:1rem;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:10px;padding:9px 10px;min-height:44px}
.g-calc select:focus,.g-calc input:focus{border-color:var(--sky);outline:2px solid rgba(74,98,224,.25);outline-offset:0}
.g-calc-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr)) minmax(0,1.1fr) minmax(0,.8fr) 40px;gap:10px;align-items:end;padding:10px 0;border-top:1px dashed var(--line)}
.g-calc-row:first-child{border-top:0;padding-top:0}
.g-calc-f{display:flex;flex-direction:column;gap:4px;min-width:0}
.g-calc-f span{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.g-calc-f input{width:100%}
.g-calc-x{width:40px;height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--muted);font-size:1.2rem;cursor:pointer}
.g-calc-x:hover{border-color:var(--sky);color:var(--navy)}
.g-calc-x[hidden]{visibility:hidden;display:block}
.g-calc-add{margin-top:8px;border:0;background:none;color:var(--blue);font:inherit;font-weight:700;font-size:.93rem;cursor:pointer;padding:6px 0}
.g-calc-add:hover{color:var(--navy);text-decoration:underline}
.g-calc-out{margin-top:14px;border-top:1px solid var(--line);padding-top:14px}
.g-calc-res{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;margin:0}
.g-calc-line{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px 14px}
.g-calc-line dt{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.g-calc-line dd{margin:4px 0 0;font-weight:760;font-stretch:106%;font-size:1.3rem;letter-spacing:-.01em;color:var(--ink);font-feature-settings:"tnum" 1;overflow-wrap:anywhere}
.g-calc-line dd span{display:block;font-weight:500;font-size:.8rem;letter-spacing:0;color:var(--muted);font-stretch:100%}
.g-calc-note{font-size:.86rem;color:var(--muted);margin:10px 0 0}
.g-calc-empty{margin:0;color:var(--muted);font-size:.95rem}
.g-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
@media (max-width:640px){
  .g-calc{padding:16px}
  .g-calc-row{grid-template-columns:repeat(3,minmax(0,1fr))}
  .g-calc-x{justify-self:end}
  /* two result cards per row, so the prices sit close to the fields while typing */
  .g-calc-res{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .g-calc-line{padding:10px 12px}
  .g-calc-line dd{font-size:1.08rem}
}

/* phones: wide tables become one card per row, each value under its column name */
@media (max-width:640px){
  .tbl.stack table,.tbl.stack tbody,.tbl.stack tr,.tbl.stack td{display:block;width:100%}
  .tbl.stack thead{display:none}
  .tbl.stack tr{padding:12px 16px;border-bottom:1px solid var(--line)}
  .tbl.stack tbody tr:last-child{border-bottom:0}
  .tbl.stack td{border:0;padding:3px 0}
  .tbl.stack td::before{content:attr(data-label);display:block;font-family:var(--f-mono);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
  .tbl.stack td:first-child::before{display:none}
  .tbl.stack td:first-child{font-size:1.02rem}
  .tbl.stack .num{white-space:normal}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}